SOHO-LASCO Comet Reports for 200105

May 01 2001 11:55:20 Scarmato Toni
toniscarmato@libero.it
Suspect faint object visible on 4 consecutive LASCO C3

images 512x512 (0,0) top-left corner at left of the pilon

Approximate Positions:

2001/05/01 12:18 (87,443)
2001/05/01 12:42 (90,445)
2001/05/01 13:42 (97,438)
2001/05/01 14:42 (104,431)


I am waiting other images to confirm.

Regards,

Toni Scarmato

May 01 2001 11:57:47 Scarmato Toni
toniscarmato@libero.it
Possible comet on 4 C3 images at rigth of the pilon

faint and diffuse


Positons:


2001/05/01 12:18 (87,443)
2001/05/01 12:42 (90,445)
2001/05/01 13:42 (97,438)
2001/05/01 14:42 (104,431)

Other informations at next post.


Regards,

Toni Scarmato
May 01 2001 12:02:44 Michael Oates
mike@ph.u-net.com
Possible comet in realtime C3 images

(May just be noise) Sorry but I have to go out
and can't wait for further images
Faint and diffuse
0,0 in bottom left corner in 1024x1024 images

Seen in a few images before these

Image Col Row
20010501_1418_c3.gif 239 177
20010501_1442_c3.gif 242 179

Michael Oates
May 01 2001 12:06:19 Scarmato Toni
toniscarmato@libero.it
Sorry.


I sent the second report to correct my comment.
The object is at "rigth" of the pilon.

Toni
May 01 2001 12:46:19 Pavel Shkreby
pavel01@mail.ru
Possible sungrazing comet in a real-time C3 images now.

Visible from 2001/05/01 14:18 UT in 2 consecutive frames.
Telescope - C3
Position in last images
Time X Y
14:18 - 248.839
14:42 - 252.833
1024x1024 0.0 - upper left corner
----------
Pavel Shkreby
May 01 2001 12:52:07 Scarmato Toni
toniscarmato@libero.it
Update regarding my last report.


I have download the image B/W at 16:18 and is visible a
brigth point on the same trajectory of the object reported.

Approximate position: 512x512 (0,0) top left corner


2001/05/01 16:18 (115,416)

Regards,

Toni Scarmato
May 01 2001 13:03:14 Sebastian Hoenig
sfhoenig@aol.com
I tried to find the latest posts by Toni, Mike and Pavel:


I wasn't able to see any object at Toni's position (by the way:
the 14:18 image is missing in the report). Seems like it's
something down in the noise.

I also didn't find anything on the positions Pavel posted (I also
checked the 13:42 image).

I can't say anything about Mike's report. There's something faint,
possibly also in the 13:42 image but I wouldn't tell it comet so
far.

Regards, Sebastian
May 01 2001 13:06:59 michael boschat
aa063@chebucto.ns.ca
COMET IN C3;


I'm at the university but
can't get XY on this stupid Unix system.
I see nothing al all catching my eye with just
2 XY's.
I see som,ething to the left about 1/4 way
fom teh pylon moving to the SUn from 1342 UT
to 1442 UT.
But like Oates I am off to teh doctor again for tests
on a lump, so if it's a comet I can't do anything
with sending out XY's.

Mike B
May 01 2001 13:54:35 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

What is this? A May Day protest? I can't find anything in the
images even closely resembling a comet. And yet I've had posts
from virtually all of my regulars. Sorry. All of the May Day
posts up to this time have been checked and no positive
detections have been found.

Doug
May 01 2001 15:24:14 michael boschat
aa063@chebucto.ns.ca
Happy May Day comrade

comet hunters!

||
@@
<
U

Mike B.
May 02 2001 05:44:03 Paolo Laquale
paololaq@tin.it
Possible sungrazing comet approaching the sun in LASCO C2 images

(512,512). The orbit appear real.
The images are : (0,0 upper left)
2001/05/02 07:31 (164,338)
2001/05/02 07:54 (168,332) faint
2001/05/02 08:06 (172,326) bright
2001/05/02 08:31 (182,322) bright

Other post are not possible because the possible comet is very
near to the sun and she will be dead.

Regards Paolo Laquale
May 02 2001 09:00:02 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
I've examined the images indicated by P. Laquale and would say

that the points are classic examples of cosmic ray hits. First,
the apparent motion of the object is erratic (moving first towards
the left, and then a sharp right turn). Second, the appearance
(morphology) of the points changes randomly.

Finally, a brief comment. The sensitivity of both C2 and C3 goes
way down in the region of the images close to the occulter edge.
This is due to the vignetting caused by the occulter. This is
advantageous for observing the corona, as it allows observations
at a wide range of heights without needing an instrument with a
huge dynamic range. This is because the coronal brightness falls
off very rapidly with height. However, this vignetting means
that we are less likely to see comets close to the occulter. So,
my point is, be suspicious of anything you see close to either
occulter.

Doug
May 02 2001 11:47:04 Paolo Laquale
paololaq@tin.it
SORRY for my error and many thanks for your explanation !!!


Regards Paolo Laquale
May 03 2001 11:42:45 Scarmato Toni
toniscarmato@libero.it
Possible comet in LASCO C3 images 512x512 (0,0) top-left

corner at positions:

2001/05/03 13:42 (107,376)faint
2001/05/03 14:18 (112,371)
2001/05/03 14:42 (116,366)
2001/05/03 15:18 (121,360)



I am waiting other images to confirm.


Regards,
Toni Scarmato
May 03 2001 12:23:48 Scarmato Toni
toniscarmato@libero.it
Regarding my last report, the object is not visible on image

at 15:42.


Regards,

Toni
May 03 2001 13:03:22 Scarmato Toni
toniscarmato@libero.it
Dear Doug,


a possible brigth comet is visible on 4 consecutive
LASCO C3 images B/W 512x512 (0,0) top-left corner
down the pilon.

Approximate positions:

2001/05/03 15:18 (114,401)faint
2001/05/03 15:42 (117,398)
2001/05/03 16:18 (120,395)
2001/05/03 16:42 (123,392)


Well visible the object moving toward the sun.
I a waiting other images to confirm.

Regards,

Toni Scarmato
May 03 2001 15:21:52 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I am unable to confirm either of T. Scarmato's latest claims for
comets in May 3, 2001 C3 images. Note, the second claim has
positions which fall smack in the middle of the pylon. If you
draw an imaginary line from the bottom left corner of the images
to the center of the image, the sensitivity of C3 is zero (0)
along that line. The image is fully vignetted there by the
presence of the pylon which holds the occulter. Therefore, any
points you see there are guaranteed to be cosmic ray hits on the
CCD.

Doug
May 03 2001 17:51:48 Miroslaw Fröhlich
MiroslawFroehlich@gmx.de
Possible comet in LASCO C2 images


Date: May 03, 2001

Brief description:
Faint sungrazing comet, no
tail visible

Positions: 1024x1024 images, (0,0) upper left

Time (x,y)

17:54 275,750
18:06 277,750
18:30 282,749
18:54 287,749

The object is also visible on following pictures.

Regards,

Miroslaw Fröhlich
May 03 2001 18:36:28 lovejoy terry
tlovejoy@bigpond.net.au
Sorry Miroslaw but the object you reported is actually a star.


Terry Lovejoy
May 04 2001 07:05:40 Paolo Laquale
paololaq@tin.it
Possible object in LASCO C2 images. The positions and date are :

(0,0) upper left corner

20010504_09:08 (116,369)
20010504_09:30 (135,362)
20010504_09:54 (148,356)
20010504_10:06 (154,353)

In the first and second image the object appear with coma.
I hope that this object is not a cosmic ray !

Regards Paolo Laquale
May 04 2001 23:49:13 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010505_0218 UT


Lower left coming from edge of
frame.

Here are the (approximate) XY coordinates of
the object.

****** NOTE ******
x-coordinates are probably correct,
but y-coordinates may be off by
several pixels.


0,477 in lower left corner

LASCO C3 IMAGES

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010505_0218.gif 512 x 512 94, 415
20010505_0242.gif 512 x 512 98, 413

----------------
Michael Boschat
May 05 2001 00:00:02 michael boschat
aa063@chebucto.ns.ca
Note, my last posting has only 2 XY's because

my PC crashed 4 times and I decided to send the
data out before I had to re-boot.

*IF* it is noise when new
images come in I will post to that effect..
if I don't crash again!!

Sorry & thanks in advance...

Mike Boschat
May 05 2001 06:21:15 Kazimieras Cernis
cernis@itpa.lt
New real time possible sungrazer comet at C2 from 9:32 till 9:54

0,0 upper left 1024x1024


DATE TIME TEL COL ROW
2001/05/05 9:32 C2 352 981
2001/05/05 9:54 C2 363 966

I am waiting for other images

Kazimieras
May 05 2001 06:41:25 Kazimieras Cernis
cernis@itpa.lt
The comet is seen above number 2 in the image of 9:32

and at 8:30 image too.


0,0 upper left at 1024x1024

DATE TIME TEL COL ROW
2001/05/05 8:30 C2 322 1021

Kazimieras Cernis
May 05 2001 06:53:58 Kazimieras Cernis
cernis@itpa.lt
New sungrazer in C2: 

0,0 upper left 1024x1024

DATE TIME TEL COL ROW
2001/05/05 10:35 C2 384 937

Kazimieras
May 05 2001 07:00:02 Maik Meyer
maik@comethunter.de
Real time comet in C2 images of 2001/05/05 starting from 08:30. Details in the next post.


Maik
May 05 2001 07:21:59 Kazimieras Cernis
cernis@itpa.lt
The comet I reported is visible as faint object in C2 at 11:06

0,0 upper left corner and 1024x1024


DATE TIME TEL COL ROW
2001/05/05 11:06 C2 399 915

Kazimieras
May 05 2001 07:23:33 Maik Meyer
maik@comethunter.de
Details on the current real-time comet. It is the same as Kazimieras reported, but I was waiting for four pictures.. not two... So I had no chance... :(


(0,0) in upper left, 1024x1024

Image
20010505_0830_c2.gif 322 1021
20010505_0932_c2.gif 352 980
20010505_0953_c2.gif 363 965
20010505_1035_c2.gif 383 936

Maik
May 05 2001 07:36:34 Maik Meyer
maik@comethunter.de
Doug and all,


just a question: I am not so intensively into comet hunting in
SOHO images anymore. But I was following the discoveries over the
last few months nevertheless. Although it is clearly stated that
at least four images are necessary for a discovery announcement I
have seen more announcements after two images than after four.

If the object is clearly a comet (i.e. tail or very diffuse) I can
understand postings after two images. But if its only a point than
it is a wild goose chase. And sometimes one may have luck. But
others, who have waited for at least four images may lose their
credit.

Same for me this morning when I saw two images and was waiting
desperately for the next ones. When I was sure after the fourth
image that it is a comet I saw that Kazimieras had already posted
after two images. I think its a kind of sport and there are some
rules to follow.

Kazimieras, this is not against you, I am fine with my findings
before, but I think it is a basic question here for all searching.

Sorry for my rant. ;)

Maik
May 05 2001 07:44:20 michael boschat
aa063@cehbucto.ns.ca
DISREGARD my post for 0218 UT object.
No images came in till 0400 UT and it was not
seen thus only "noise".
Sorry.

I agree with Maik. I think we should post
4 coordinates and not 1-2 coordinates. Also,
we could hold off on the "talk" after the find
to not take up bandwidth on the form, unless the comet
changes course and is headed for Earth.
@@
<
0 D'Oh!

Mike B.
May 05 2001 09:32:56 Scarmato Toni
toniscarmato@libero.it
Possible new comet on 5 consecutive LASCO C3 images

512x512 (0,0) top-left corner at approximate positions:


2001/05/05 10:23 (502,364)
2001/05/05 11:18 (501,360)
2001/05/05 11:42 (500,357)
2001/05/05 12:18 (499,354)
2001/05/05 12:42 (498,350)



I am waiting other images.


Toni Scarmato
May 05 2001 12:43:27 Scarmato Toni
toniscarmato@libero.it
Not consider my last report.

The object is not visible on image at 13:42.


Toni
May 05 2001 20:40:55 Erwin Schwab
erwinschwab@t-online.de
hello Doug


object on 4 consecutive LASCO C2 Images,
moving toward the sun.

1024x1024 (0,0) top-left corner


Approximate positions:

x,y
20010505_20:30 (792,1006)
20010505_21:30 (726,867)
20010505_21:54 (686,819)
20010505_22:06 (678,806)
20010505_22:30 (617,729)


Regards Erwin Schwab
May 06 2001 08:19:11 Sebastian Hoenig
sfhoenig@aol.com
Sorry Erwin, but your object is just random cosmic ray hit as

there is no consitance in shape and a high unpredictable variety
in brightness. A real object doesn't behave that way.

Regards, Sebastian
May 06 2001 14:31:23 Michael Oates
mike@ph.u-net.com
Possible comet in realtime C2 images


0,0 in bottom left corner in 1024x1024 images

Image Col Row
20010506_1730_c2.gif 636 15
20010506_1754_c2.gif 644 35
20010506_1806_c2.gif 648 45


Michael Oates
May 06 2001 14:49:02 Michael Oates
mike@ph.u-net.com
Possible comet in realtime C2 images. Update:


A note on my posting with 3 point earlier...
I was about to add the 4th point to this report when
the computer started crashing, I just had the oportunity of
sending the post before I lost total control, I was not able to
measure the 4th position (in a bw image), even though I knew it
was there. The gif image is now in.

0,0 in bottom left corner in 1024x1024 images

Image Col Row
20010506_1730_c2.gif 636 15
20010506_1754_c2.gif 644 35
20010506_1806_c2.gif 648 45
20010506_1830_c2.gif 656 66

Michael Oates
May 06 2001 15:23:31 Sebastian Hoenig
sfhoenig@aol.com
I can also identify Mike's comet report. It would be interesting 

whether it will be calles a Kreutz or non-Kreutz comet.

Congrats.

Sebastian
May 06 2001 18:09:57 Miroslaw Fröhlich
MiroslawFroehlich@gmx.de
Possible comet in LASCO C2 images


Date: May 06, 2001

Positions: 512x512 images, (0,0) upper left

Time (x,y)

16:06 101,343
16:30 106,329
16:54 112,320
17:06 129,301
17:30 152,286

Regards,

Miroslaw Fröhlich
May 06 2001 18:41:04
 
May 06 2001 19:04:50 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C2 images - 20010506_2206 UT

Coordinates next post.

small, diffuse looking
to me....but waiting for 2 more
images to have 4 images to be sure.

Mike B.
May 06 2001 19:58:20 michael boschat
aa063@chebucto.ns.ca
Because no new images came in after 2230 UT 

I'm posting these 2 XY's -- sorry...
if and when new images come in it may be
too late to be positive till the mising
ones are put in...anyways...
it could be "noise" but who knows...

The object comes out of the bottom
mid right, close to were Mike O.
found the earlier one.

Here are the (approximate) XY coordinates of
the object.

****** NOTE ******
x-coordinates are probably correct,
but y-coordinates may be off by
several pixels.


0,477 in lower left corner

LASCO C2 IMAGES

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010506_2206.gif 512 x 512 281, 478
20010506_2230.gif 512 x 512 283, 474

Mike Boschat
May 06 2001 22:03:28 michael boschat
aa063@chebucto.ns.ca
DISREGARD My LAST POST of C2

Objevt --- it was "noise" only..

Mike B.
May 07 2001 03:19:31 Erwin Schwab
e.schwab@gsi.de
object on 3 consecutive LASCO C2 Images, 

moving toward the sun.


Approximate positions: 1024x1024 (0,0) top-left corner

20010507_05:54 (363,9)
20010507_06:06 (366,14)
20010507_06:30 (370,21)

waiting for next piccture

Regards Erwin
May 07 2001 07:55:57 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi all,
Due to other work commitments, I am unlikely to have much
time this week to check out the reports. I have forwarded a few
comments to Derek to check out. I may be able to do something
Wednesday. Or possibly Friday. Thanks for sending in your
reports.

Please, once you've reported an object with positions,
even if it is only 2 images. Wait until there a enough images, at
least 4, before posting again. Don't post after every single image.
There is no new information in that and it makes it more difficult
to track the posts. Also, you've already got the one post in for
credit, so there is no need to keep posting. One follow-up with
the final details is sufficient. Also, we have frequent data gaps,
for a variety of reasons. If you think you see something in the
last image or two before a gap, that certainly isn't sufficient to
post a report. Wait for the gap to fill in. Please.

There, I've written a paragraph that starts and ends with
the word 'please'. I'm sure there must be a law against that.

Doug
May 07 2001 11:07:04 Scarmato Toni
toniscarmato@libero.it
Suspect object moving toward the sun visible on 4

consecutive LASCO C3 images 512x512 (0,0) top-left corner


Positions:


2001/05/07 12:42 (77,376)?
2001/05/07 13:42 (81,372)
2001/05/07 14:18 (83,370)
2001/05/07 14:42 (85,368)Brigth


Regards,

Toni Scarmato
May 07 2001 11:48:04 Scarmato Toni
toniscarmato@libero.it
Regarding my last report the object is visible on image

at 2001/05/07 15:18 (87,366) but became faint.
Probably noise.



Toni
May 08 2001 09:41:51 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I've examined all of the reports and here's my take on them. But
first, an announcement. Please. Four points is a minimum. Yes,
we accept fewer, but only when it's such an obvious comet even
my Mom would recognize it. Please, don't guess. Don't speculate.
Don't hope. Watch comets which have been confirmed before trying
to report one yourself. Sorry, this is a big post. Please read it,
all of it, and consider the points that I raise. These are
cursory discussions. Not meant to be talked out here as a
discussion group. E-mail me if you want more information

Doug

1) M. Frohlich's report on May 3 is indeed a star. No, I've
not bothered to identify which one. No time.

2) P. Laquale's report on May 4. The object appears in only 4
frames, and changes in brightness quite rapidly. We can not
in any way verify any object if it appears in only 4 frames and
does not fit an expected profile (either an extended object, or
with a tail, or on a Kreutz trajectory and changing in brightness
as expected.)

3) M. Boschat's C3 claim on May 4. Only 2 points. Should not
have been posted. Nothing more than cosmic rays.

4) K. Cernis' May 5 C2 claim. Still under consideration. Probably
a real comet.

5) T. Scarmato's May 5 claim. Nothing there. See comment below.

6) E. Schwab's claim for May 5. The main point to make here is
that the points are so far apart, that there is essentially no
way to relate them to each other. It's a statistical argument. The
cosmic ray count is so high, if you consider any range of allowable
'velocities', you will always find something. Also if the
comet is near the Sun, the apparent velocity is too high. The
maximum velocity a body falling from infinity to the Sun will have
is about 600 km/sec. And that's at the Sun's surface. It's slower
than that in the C2 FOV. For those who want something to do.
a) Calculate the exact escape velocity of the Sun.
b) Determine the maximum number of pixels/hour that would be in C2
and in C3.

7) M. Oates claim on May 6. Interesting. Still under consideration.

8) M. Frohlich (I hope I'm spelling that correctly) claim for May 6.
This is a case of connect the dots (cosmic rays). The object
makes a right turn which just isn't natural.

9) E. Schwab claim for May 7. Hey, it's only 3 points. You've
managed to catch this 'disease' as well. And, as I'm sure you've
since realized, there's nothing in the subsequent images. Cosmic
rays.

10)T. Scarmato's claim for May 7. Definitely cosmic rays. But let
me add a few comments.

a) If you have a ? next to one of the data points, then you
effectively only have 3 data points. If there is a questionable data
point, it doesn't count towards the 4 image minimum

b) Toni, I still believe there must be something wrong with the image
processing you are doing. For example, in the latest post. At
14:42 you say the point is bright. But, I've checked the raw data
and that point is only 40 total counts above the background. That
is less than 2 counts/second. Bright comets are 100's to 1000's
of counts per second. As for the point at 14:18 UT. In the whole
area around the point you give, there is nothing exceeding a change
of 5 counts from the background. Dividing by the typical C2
exposure time gives 0.2 counts per second. That is so far in
the noise that there is no way to say there's anything there. Here's
my suggestion, if it's not at least as bright as the 4th point in
your post (which you label as bright), then ignore it. It's probably
not real.
May 10 2001 04:30:15 Mimeev Alexander
alexpm@iname.ru
Hello , Doug, Derek and all.

Search program FEDERICO detected all objects 20, 26, 30 april
and 5 may - all comets. FEDERICO not find (!!!) object 6 may (Mike Oates).

A. Mimeev, F. Mimeev
May 10 2001 12:43:29 Xavier Leprette
xavier.leprette@education.gouv.fr
A possible sungrazer comet in a real-time C2 images now.


It is a faint data point and it is visible in 4 consecutive images on 2001/05/10
from 03:30 to 04:54 UT in bottom left quadrant at the right of the date.
The object is moving towards the sun.

I'm waiting others images to confirm my report.
Positions in a next e-mail.

Xavier Leprette
May 10 2001 13:03:16 Xavier Leprette
xavier.leprette@education.gouv.fr
Possible sungrazer comet in a real-time C2 images 

(More information about the previous message)

The object is visible from 03:30 UT till 06:30 on 9 consecutive images
on 2001/05/10 in C2 real-time

Approximate positions measured from the top-left corner
of a 1024x1024 frames :

col, row
00:30 UT 204,502
03:54 UT 209,495
04:30 UT 211,490
04:54 UT 217,481
05:06 UT 222,472
05:30 UT 225,469

etc.

Xavier Leprette
May 10 2001 13:03:20 mike boschat
aa063@chebucto.ns.ca
I can confirm Xaviers comet find.

MB
May 10 2001 13:11:42 Xavier Leprette
xavier.leprette@education.gouv.fr
About my previous message :

I'm sorry, the positions are measured from the top-left corner
of a 512x512 frames

Xavier
May 10 2001 13:17:48 Scarmato Toni
toniscarmato@libero.it
Possible faint comet enter in C2 images at 2001/05/09.


The object is faint and diffuse at positions:

512x512 (0,0) top-left corner

2001/05/09 21:54 (192,502)
2001/05/09 22:06 (196,492)
2001/05/09 22:30 (201,474)
2001/05/09 23:06 (207,452)



Regards,

Toni Scarmato
May 10 2001 13:27:04 Xavier Leprette
xavier.leprette@education.gouv.fr
Possible sungrazer comet in a real-time C2 images 

(More information about the previous messages)

NEW UPDATE : There was a shift in my positions with hours,
I'm very sorry Doug for all these errors.

The object is visible from 03:30 UT till 06:30 on 10 consecutive images
on 2001/05/10

Approximate positions measured from the top-left corner
of a 512x512 frames :

col, row
03:30 UT 204,502
03:54 UT 209,495
04:06 UT 211,490
04:30 UT 217,481
04:54 UT 222,472
05:06 UT 225,469
etc.

Xavier Leprette
May 10 2001 14:08:37 Sebastian Hoenig
sfhoenig@aol.com
Can`t find a real object at Toni's positions. 


Congratulations Xavier - and could you please tell me your
resident city for my webpage (private reply).

Sebastian
May 11 2001 03:09:56 Michael Oates
mike@ph.u-net.com
Possible comet in realtime C2 images

This is an extreamly faint one, you may not accept it Doug,
but I think it worthy of reporting nevertheless.
This is a preliminary post to get my claim in, I will work on
this more this morning and post again with better positions,
and state it if I still think it a possible comet

(0,0 in bottom left corner in 1024x1024 images)

Image Col Row
20010511_0505_c2.gif 571 11
20010511_0515_c2.gif
20010511_0520_c2.gif
20010511_0530_c2.gif 982 42

Michael Oates
May 11 2001 05:32:20 Michael Oates
mike@ph.u-net.com
Re: My last report.

Doug, don't waste your time on this till I can I spend some time
on it my self - too busy at work today :(
I am skeptical about this one.
Mike
May 11 2001 11:13:57 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C2 images - 20010511_1415 UT

Not sure on this, mabey someone with better res
can see it? It's faint and may be "noise"
It's 1/2 way from the "5" in 1415 to a piece of "dirt" to the right.
1415 UT - 206, 469
1420 UT - 212, 465
1430 UT - 218, 459
1435 UT - 225, 452

Mike B
May 11 2001 11:17:21 Michael Oates
mike@ph.u-net.com
Doug,

I am not happy with this, so I will withdraw the claim.
This is just too faint to get any decent positions.
The second position I gave before, was a typing error
it should have been: 0530_c2.gif 585 42

Michael Oates
May 11 2001 11:27:22 michael boschat
aa063@chebucto.ns.ca
OK. I forgot that using the university computer

is no good, so here is the way I should have
reported this object...

SORRY!!!

A crude ascii drawing of the area

* -- "dirt"
yyyy/00/1415 x -- object
==============================

Here are the (approximate) XY coordinates of
the object.

****** NOTE ******
x-coordinates are probably correct,
but y-coordinates may be off by
several pixels.


0,477 in lower left corner

LASCO C2 IMAGES

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010511_1415.gif 512 x 512 206, 469
20010511_1420.gif 512 x 512 212, 465
20010511_1430.gif 512 x 512 218, 459
20010511_1435.gif 512 x 512 225, 452

----------------
Michael Boschat
May 11 2001 12:21:54 michael boschat
aa063@chebucto.ns.ca
DISREGARD my last observation for the 20010511_1415 UT
object in C2.
I managed to reverse the image at home
and it is NOT a comet but noise.

Sorry..

Mike B.
May 13 2001 14:51:10 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C2 images - 20010512_0241 UT

Coordinates:

****** NOTE ******
x-coordinates are probably correct,
but y-coordinates may be off by
several pixels.
Object faint. Michael Boschat -- ran out of room!!
0,477 in lower left corner
C2 images
20010513_0241.gif 512 x 512 223, 472
20010513_0250.gif 512 x 512 226, 469
20010513_0258.gif 512 x 512 228, 466
20010513_0305.gif 512 x 512 229, 462
May 13 2001 14:57:11 michael boschat
aa063@chebucto.ns.ca
CORRECTION!!! DATE SHOULD READ 13th  -- NOT 12th!!!!

images are coming in late!

Mike Boschat
May 14 2001 08:48:40 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi all,
First, let me say that I can't confirm M. Boschat's latest
claim on May 13th. The consistency of the points in the images
that I would like to see isn't there.

Second, I've finally accepted as confirmed the following
three comets.

SOHO Date Tel Discoverer
----------------------------------
311 01/05/05 C2 K. Cernis
312 01/05/06 C2 M. Oates
313 01/05/10 C2 X. Leprette

Doug
May 14 2001 13:14:52 Scarmato Toni
toniscarmato@libero.it
Suspect object visible on 4 consecutive LASCO C3 images 

512x512 (0,0) top-left corner at postions:


2001/05/14 16:10 (61,380)
2001/05/14 16:25 (63,379)
2001/05/14 16:40 (65,378)
2001/05/14 16:55 (67,377)


The object move toward the sun.


Regards,

Toni Scarmato
May 14 2001 14:18:13 Sebastian Hoenig
sfhoenig@aol.com
Regarding Toni's post:


No object visible in the following images.

Regards, Sebastian
May 15 2001 10:02:02 michael boschat
aa063@chebucto.ns.ca
OFF TOPIC --- the bright

object starting to enter the C3 field at

mid left is Saturn.

Mike B.
May 15 2001 16:13:26 mike roman
mroman2@ix.netcom.com
Possible comet or stary light?lasco c3 gif 900kb.386,270

5/15/01 18:42.thank you for your time.
May 15 2001 16:28:05 Sebastian Hoenig
sfhoenig@aol.com
Mike R,


compare with the previous image(s) and you will find out what it
is ;-)

Sebastian
May 15 2001 17:09:06 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Regarding M. Roman's claim. That is indeed a cosmic ray hit.
Remember, 4 images. If it's not in 4 images, it's not worth
reporting. If it's in only 1, then don't bother.

That is indeed Saturn. You can find the list of objects that
will be in C3 by clicking on the C3 Transits link on my homepage.

Doug
May 16 2001 05:01:30 Scarmato Toni
toniscarmato@libero.it
Possible comet visible on 4 consecutive LASCO C3 images

512x512 (0,0) top-left corner at approximate positions:


2001/05/16 04:18 (146,416)
2001/05/16 04:42 (147,414)
2001/05/16 05:18 (148,412)
2001/05/16 05:42 (149,410)


The object increase your brigthness in reliable way at this
distance of the Sun.
I am waiting other images to confirm.

Regards,

Toni Scarmato
May 16 2001 08:33:38 Scarmato Toni
toniscarmato@libero.it
SORRY!

Not consider my last report. The object is not visible
at 06:18.

Toni
May 16 2001 08:45:56 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I am unable to confirm either of T. Scarmato's claims for a
comet in C3 (May 14 and May 16). The indicated points appear
to be either random noise or cosmic rays.

Doug
May 17 2001 05:52:02 Scarmato Toni
toniscarmato@libero.it
Suspect object moving toward the sun at left of the pilon

visible on 4 consecutive images C3 512x512 (0,0) top-left
corner:

Approximate positions:

2001/05/17 04:18 (65,416)
2001/05/17 04:42 (67,414)
2001/05/17 05:18 (69,412)
2001/05/17 05:42 (71,410)


I am waiting other images to confirm.


Regards,

Toni Scarmato
May 17 2001 08:46:34 Scarmato Toni
toniscarmato@libero.it
Dear Doug,


regarding my last report, probably noise.

Regards,

Toni Scarmato
May 17 2001 14:30:42 Paolo Laquale
paololaq@tin.it
Suspect object in LASCO C2 images (1024x1024)

The object moving towards the sun and increase his brightness
The positions and dates are : (0,0 upper left corner)

x , y
20010517_16:28(UT) 701,979
20010517_16:50(UT) 693,957
20010517_17:06(UT) 690,936
20010517_17:26(UT) 687,910

Is there anybody that can confirm this post?

Regards Paolo Laquale
May 17 2001 15:47:11 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I am unable to confirm P. Laquale's claim for May 17 in C2. The
4 points vary randomly in brightness and the apparent motion
and velocity do not vary in a smooth way. These are cosmic
rays.

Doug
May 19 2001 14:45:36 Paolo Laquale
paololaq@tin.it
Possible object in Lasco C2 images 1024x1024

The positions and dates are : (0,0 upper left corner)

X , Y
20010519_01:50(UT) 749,776
20010519_02:06(UT) 740,770 (with little coma, outburst? )
20010519_02:26(UT) 729,765
20010519_02:50(UT) 721,761

I cannot cheked other images because at this time there are
no more images in the list

Regards Paolo Laquale
May 19 2001 16:40:55 Michael Oates
mike@ph.u-net.com
Comet in realtime C2 images

3 images so far. this is real

(0,0 in bottom left corner in 1024x1024 images)

Image Col Row
20010519_1927_c2.gif 503 5
20010519_1950_c2.gif 511 19
20010519_2006_c2.gif

Michael Oates
May 19 2001 17:52:29 don lark
wee3@mm.cccr.ru
Hmmm/...3 images in C2 to say
comet. But only 2 xy's given...guess
rules to follow don't apply to all.
May 19 2001 19:48:24 terry lovejoy
tlovejoy@bigpond.net.au
I can confirm M. Oates C2 discovery.


It is also obvious enough to warrant announcement
from 3 positions.

Terry Lovejoy

May 19 2001 21:11:25 michael boschat
aa063@chebucto.ns.ca
Possible faint fragment following-------------------------------------------
comet?
x-coordinates are probably correct,
but y-coordinates may be off by
several pixels.
0,477 in lower left corner
LASCO C3 IMAGES
Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010519_2126.gif 512 x 512 270, 440
20010519_2150.gif 512 x 512 273, 433
20010519_2206.gif 512 x 512 275, 427
20010519_2226.gif 512 x 512 278, 419
Mike B.
May 19 2001 21:13:55 michael boschat
aa063@chebucto.ns.ca
Last post should read C2 NOT C3..

Mike B.
May 19 2001 21:19:11 michael boschat
aa063@chebucto.ns.ca
OFF TOPIC -- Internet problem!

Anyone trying to reach me at aa063@chebucto.ns.ca
may get mail back, they are installing new software
and are still working at it. For now I can be reached at
my university account --- andromed@atm.dal.ca
Hopefully the Chebucto system will be up by tomorrow
but here Monday the 21st is a holiday!

You can send to my Chebucto address but I will not be able
to reply till they are up.
I will be checking this form though...thanks in advance

Mike B.
May 20 2001 10:51:37 Peretto Ivo
naos2@tiscalinet.it
Suspect object in LASCO C2 images (512X512).

The object seems moving towards the Sun.
The positions are: (o,o upper left corner)

20010519_2126 C2 X: 270 Y:468
20010519_2150 C2 X: 273 Y:461
20010519_2206 C2 X: 276 Y:453
20010519_2226 C2 X: 280 Y:446

Regards

Ivo Peretto
May 20 2001 11:01:53 Peretto Ivo
naos2@tiscalinet.it
Suspect object in LASCO C2 images (512X512).

The object seems moving towards the Sun.
The positions are: (o,o upper left corner)

20010519_2126 C2 X: 270 Y:468
20010519_2150 C2 X: 273 Y:461
20010519_2206 C2 X: 276 Y:453
20010519_2226 C2 X: 280 Y:446

Regards

Ivo Peretto
May 20 2001 11:09:48 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Please don't use this forum for personal correspondence.  It is

for the reporting of comets only.

I'll deal with the comet reports Monday morning.

Thank you.
Doug
May 20 2001 18:18:35 Peretto Ivo
naos2@tiscalinet.it
First: Excuse for my last report but I don't understand the Oates' coordinates. Then I confirm the Oates' discover. 


Second: suspect object in LASCO C2 image (512X512)
the position is (0,0 upper left corner)

20010519_2226 C2 X:26 Y:227

I wait confirm from new images (in Italy are 00:30 and I can't take new image until next afternoon)

Regards

Peretto Ivo
May 21 2001 02:13:48 Michael Oates
mike@ph.u-net.com
UPDATE


The comet I reported in C2 on 19 May is also visible
in C3. It can be seen in 14 images starting at 11.42
on the 19 May.

(0,0 in bottom left corner in 1024x1024 images)

The full positions for 11 images in C3 are:
Image Col Row
20010519_1142_c3.gif 488 367
20010519_1218_c3.gif 491 373
20010519_1242_c3.gif 492 375 ?
20010519_1342_c3.gif 496 382
20010519_1418_c3.gif 499 387
20010519_1442_c3.gif 500 389 ?
20010519_1518_c3.gif 502 394
20010519_1542_c3.gif 504 397
20010519_1618_c3.gif 506 401
20010519_1642_c3.gif 507 405
20010519_1718_c3.gif ?
20010519_1742_c3.gif 511 413
20010519_1818_c3.gif 514 418
20010519_1842_c3.gif 515 422

The full positions for 11 images in C2 are:
Image Col Row
20010519_1927_c2.gif 503 5
20010519_1950_c2.gif 510 20
20010519_2006_c2.gif 515 31
20010519_2026_c2.gif 521 44
20010519_2050_c2.gif 528 61
20010519_2126_c2.gif 540 87
20010519_2150_c2.gif 547 105
20010519_2206_c2.gif 552 117
20010519_2226_c2.gif 558 131
20010519_2326_c2.gif 577 178
20010519_2350_c2.gif 585 199 ?

Some positions marked with a ? are very faint and may
not be accurate.

Michael Oates
May 21 2001 05:26:17 Scarmato Toni
toniscarmato@libero.it
Possible brigth comet on 4 LASCO C3 images B/W at positions:



512x512 (0,0) top-left corner:


2001/05/21 06:42 (114,363)
2001/05/21 07:42 (119,355)
2001/05/21 08:18 (122,351)
2001/05/21 08:42 (125,347)


I am waiting other images to confirm.


Regards,

Toni Scarmato


May 21 2001 05:51:03 Scarmato Toni
toniscarmato@libero.it
Not consider my last report, the object is not visible

on image at 09:18



Toni
May 21 2001 09:59:22 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I am able to confirm only one claim from the weekend. That is the
comet which was visible in both C2 and C3 on May 19th. It was
first reported by M. Oates. And yes, he does get credit, even
though he only reported 2 positions. More on that later.

Rough positions for SOHO-314 are:

# HEIGHT DATE TIME ANGLE TEL FC COL ROW
9.29 2001/05/19 12:18:05 170.5 C3 11 491.0 372.0
8.68 2001/05/19 13:42:06 171.7 C3 11 496.0 382.0
8.00 2001/05/19 15:18:05 173.9 C3 11 503.0 393.0
7.82 2001/05/19 15:42:06 173.8 C3 11 503.0 396.0
7.58 2001/05/19 16:18:05 174.9 C3 11 506.0 400.0
7.34 2001/05/19 16:42:05 175.2 C3 11 507.0 404.0

6.19 2001/05/19 19:27:23 178.9 C2 10 503.0 3.0
6.00 2001/05/19 19:50:05 179.7 C2 10 510.0 19.0
5.88 2001/05/19 20:06:06 180.3 C2 10 515.0 29.0
5.70 2001/05/19 20:26:05 181.1 C2 10 521.0 44.0
5.51 2001/05/19 20:50:05 182.1 C2 10 529.0 60.0
5.21 2001/05/19 21:26:08 183.8 C2 10 540.0 85.0
5.01 2001/05/19 21:50:05 184.8 C2 10 546.0 102.0
4.83 2001/05/19 22:06:05 185.8 C2 10 552.0 117.0
4.67 2001/05/19 22:26:06 186.9 C2 10 558.0 131.0
4.14 2001/05/19 23:26:05 191.2 C2 10 577.0 178.0
3.92 2001/05/19 23:50:05 193.3 C2 10 585.0 198.0


I have always given credit to anyone, no matter how few images and
or positions they report. That's not something I wanted to
publicize too widely. Lest, I get lots of spurious claims with
2 or 3 positions. Of course, I already get lots of spurious claims,
even with the minimum of 4.

Generally, if a comet is bright enough and extended enough to look
cometary, then fewer than 4 images is okay. Though, not really
desired. Also, some observers are better at distinguishing comets
from the noise than others. So, I don't mind so much if they submit
an occasional report with fewer than 4 images. Some people post
virtually every day and are wrong over 99% of the time. Others
are accurate to that sort of level.

This latest comet was probably right on the edge. I wouldn't have
believed it with only 4 images, but I would certainly have watched
it closely.

With all of this in mind, let me give you all the first warning.
Beginning June 1st, I'll be recording the number of posts for
each observer, as well as the number of comets discovered by each
observer. At periodic intervals, I will be posting on the web
page the success rate of each observer.

Doug
May 22 2001 09:07:53 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Comet in C2 images from May 22.


# HEIGHT DATE TIME ANGLE TEL FC COL ROW
6.39 2001/05/22 10:28:05 194.8 C2 10 645.0 4.0
6.14 2001/05/22 11:06:05 196.4 C2 10 653.0 28.0
6.02 2001/05/22 11:26:06 197.2 C2 10 657.0 39.0
5.87 2001/05/22 11:50:05 198.4 C2 10 662.0 54.0
5.77 2001/05/22 12:06:05 199.2 C2 10 666.0 64.0
5.66 2001/05/22 12:26:05 200.1 C2 10 670.0 75.0
May 22 2001 09:09:28 Michael Oates
mike@ph.u-net.com
Comet in realtime BW C2 images.

This is in 3 images so far. It looks like a comet it's
in the right place and has the right motion. It is diffuse
with no tail evident in the 512 images. I don't need to wait
for 4 images, as it's quite evident that this is a comet.
0,0 in bottom left corner of 512x512 images

Image Col Row
20010522_1126 328 20
20010522_1150 missed image
20010522_1206 missed image
20010522_1226 334 38
20010522_1250 337 47

Michael Oates
May 22 2001 09:15:38 Sebastian Hoenig
sfhoenig@aol.com
Yes, I can confirm. I was only 2 minutes too lat :(


Sebastian
May 22 2001 09:33:55 Leprette Xavier
xavier.leprette@education.gouv.fr

A possible sungrazer comet in a real-time C2 images now.

It is a fairly bright data point and it is visible in 2 consecutive images on 2001/05/22
from 11:50 to 12:06 UT in bottom left quadrant at the right of the date.
The object is moving towards the sun.
Sorry Doug, I've only 2 images for the moment.I'm pretty sure it's a real object.

I'm waiting others images to confirm my report.
Positions in a next e-mail.

Xavier Leprette
May 22 2001 09:52:44 Leprette Xavier
xavier.leprette@education.gouv.fr
Congratulations Doug, I was too late!


Xavier
May 22 2001 10:59:19 Scarmato Toni
toniscarmato@libero.it
Dear Doug, congratulations for your comet.


I am watching the C2 images B/W and I see an object at following
positions:

512x512 (0,0) top-left corner

2001/05/22 12:52 (336,463)
2001/05/22 13:50 (344,448)
2001/05/22 14:26 (346,436)


Seem a comet, but I not understand if it is your comet.


Regards,

Toni Scarmato
May 22 2001 11:17:02 Scarmato Toni
toniscarmato@libero.it
Regarding my last report the object continue to be visible 

on image B/W at 14:50

Update positions:

2001/05/22 12:52 (336,463)
2001/05/22 13:50 (344,449)
2001/05/22 14:26 (346,436)
2001/05/22 14:50 (349,427)

Regards,

Toni Scarmato
May 22 2001 13:26:32 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Hi all,

This is just to make sure everyone is aware that all of the
reports made so far today refer to the same comet, which was first
reported by myself. Apparently only by a whisker.

Also, for those not aware, I do not strictly follow the
rules, as I don't list the image size or origin for the measurements.
But, as I've said before, unless stated otherwise, all observations
are for full-resolution images with (0,0) in the bottom-left
corner. This is the LASCO convention. When other people post
positions, I convert them to match this convention.

Doug
May 22 2001 13:36:04 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010522_1318 UT
Here are the (approximate) XY coordinates of
the object and an image of the area.
****** NOTE ******
x-coordinates are probably correct,
but y-coordinates may be off by
several pixels. 0,477 in lower left corner
LASCO C3 IMAGES Size X & Y
20010522_1318.gif 512 x 512 231, 255
20010522_1342.gif 512 x 512 232, 253
20010522_1418.gif 512 x 512 232, 253
20010522_1442.gif 512 x 512 233, 252
Object is to left of pylor near occultaing disk, yeah i
know....a very tricky area...
Mike B.
May 22 2001 13:39:03 michael boschat
aa063@chebucto.ns.ca
Correction to my post -- object is to RIGHT of pylon!
Agh!

Mike B
May 22 2001 16:39:24 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
I am unable to confirm M. Boschat's claim of a C3 object on May 22.


Doug
May 22 2001 18:16:58 Peretto Ivo
naos2@tiscalinet.it
Dear Doug,

suspect object in LASCO C2 images (512X512)
The object seems moving towards the sun and it's very bright.
The positions are (0,0 upper left corner)

20010522_1552 C2 X:282 Y:402
20010522_1606 C2 X:280 Y:386
20010522_1628 C2 X:279 Y:376
20010522_1650 C2 X:278 Y:368 Break in 3 parts
20010522_1706 C2 X:? Y:? very near at the sun
20010522_1726 C2 X:273 Y:359 ?

It's approximate under the center of the sun

Regards

Ivo Peretto
May 23 2001 05:59:02 Scarmato Toni
toniscarmato@libero.it
Possible comet visible on 5 consecutive LASCO C3 images

512x512 (0,0) top-left corner at approximate positions:


2001/05/23 06:18 (61,412)
2001/05/23 06:42 (63,411)
2001/05/23 07:42 (66,409)
2001/05/23 08:18 (68,408)
2001/05/23 08:42 (70,406)


The object is visible at left of the pilon, is faint.


Regards,

Toni Scarmato
May 23 2001 06:31:22 Michael Oates
mike@ph.u-net.com
Possible comet in C2 realtime images

This is fainter than yesterdays comet in the same place,
it is cometary in appearance. So far in 3 images.
0,0 in bottom left of 1024x1024 images

Image Col Row
20010523_0850_c2.gif 658 5
20010523_0926_c2.gif 665 26
20010523_0952_c2 BW 670 41

Michael Oates
May 23 2001 07:12:15 Michael Oates
mike@ph.u-net.com
UPDATE: Comet in C2 realtime images

Now in 5 images.
I note that this is getting brighter not fainter as one
would normally expect.
0,0 in bottom left of 1024x1024 images

Image Col Row
20010523_0850_c2.gif 658 5
20010523_0926_c2.gif 665 26
20010523_0952_c2.gif 670 41
20010523_1006_c2.gif 673 50
20010523_1028_c2.gif 677 63

Michael Oates
May 23 2001 07:15:09 Kazimieras Cernis
cernis@itpa.lt
I can confirm M. Oates new discovery on C2. The comet

is faint and visible on more than four images starting 8:30 UT.
Kazimieras
May 23 2001 07:38:10 michael boschat
aa063@chebucto.ns.ca
Comet in C2 now 0926 UT
coordinates to follow

Mike B
May 23 2001 07:40:21 michael boschat
aa063@chebucto.ns.ca
FORGET IT!!!!!!!!!
OATES FOUND IT AS USUAL!

MB
May 23 2001 08:34:51 Kazimieras Cernis
cernis@itpa.lt
Possible another comet in C2 realtime images.

The comet trajectory is near M. Oates come
but slight to the right.

DATE TIME TEL COL ROW
2001/05/23 11:50 C2 681 7
12:06 C2 /// //
Kazimieras Cernis
May 23 2001 08:36:12 Kazimieras Cernis
cernis@itpa.lt
Possible another comet in C2 realtime images.

The comet trajectory is near M. Oates come
but slight to the right.

DATE TIME TEL COL ROW
2001/05/23 11:50 C2 681 7
12:06 C2 684 18
Kazimieras Cernis
May 23 2001 08:39:46 Michael Oates
mike@ph.u-net.com
Possible Comet in C2 realtime images

Near to the previous comet today
Again cometary appearance, faint. In 3 images.
But very confindent. Measured 2.
0,0 in bottom left of 1024x1024 images

Image Col Row
20010523_1150_c2.gif 681 8
20010523_1206_c2.gif 684 18
20010523_1226_c2 BW
Michael Oates
May 23 2001 08:55:38 Scarmato Toni
toniscamato@libero.it
I saw the object reported by M.Oates. Congrats.


Another object seem to follow the first.

Positions:

2001/05/23 11:50 (342,503)
2001/05/23 12:06 (340,508)


I am waiting other images to confirm.


Regards,

Toni Scarmato
May 23 2001 09:02:52 Scarmato Toni
toniscarmato@libero.it
The object is visbile on image C2 B/W at positions:



2001/05/23 12:26 (344,496)


Regards,

Toni
May 23 2001 09:04:33 Dong Hua CHEN
cdh_2001@sina.com
Dear Doug and all,                                                

Suspect object in LASCO C2 images {1024x1024}. The positions and datas are [0,0, upper left corner]:

x y
2001-05-23 11:50 680 1017
2001-05-23 12:06 684 1006

I am waiting other images to comfirm.

Chen Dong Hua
May 23 2001 09:26:02 Scarmato Toni
toniscarmato@libero.it
The second object continue to be visible at position:


512x512 (0,0) top-left corner B/W image

2001/05/23 12:52 (345,487)


Toni
May 23 2001 09:28:55 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

First, I can confirm the M. Oates claim for the first object on
May 23. The preliminary positions are given below. I'm waiting
on at least one more image before confirming the trailing object.

As far as the I. Peretto claim goes, it's tantilizingly suspicious,
but does only appear in 4 frames. Also, it appears in the middle
of the image and is bright in the first images, so the question
is, where was it before then? So, I do believe this to be one
of those fortuitous arrangements of cosmic rays which closely
mimic a comet.

I am unable to see anything at the location of the T. Scarmato claim
for C3.

#COMMENT: COMET SOHO-316
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
6.44 2001/05/23 08:50:05 196.3 C2 10 659.0 4.0
6.22 2001/05/23 09:26:10 197.7 C2 10 666.0 25.0
6.06 2001/05/23 09:52:07 198.7 C2 10 670.0 40.0
5.98 2001/05/23 10:06:07 199.4 C2 10 673.0 48.0
5.84 2001/05/23 10:28:06 200.5 C2 10 678.0 62.0
5.62 2001/05/23 11:06:07 202.3 C2 10 685.0 85.0
5.48 2001/05/23 11:26:06 203.5 C2 10 689.0 99.0
5.33 2001/05/23 11:50:05 204.8 C2 10 693.0 114.0

Doug
May 23 2001 09:53:44 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

It looks like the comet first reported by K. Cernis is indeed
real. My measurements are given below. Anybody want to lay odds
on whether or not there will be a 3rd one today?

Doug

# HEIGHT DATE TIME ANGLE TEL FC COL ROW
6.48 2001/05/23 11:50:05 198.7 C2 10 681.0 7.0
6.37 2001/05/23 12:06:06 199.4 C2 10 684.0 18.0
6.24 2001/05/23 12:26:05 200.3 C2 10 688.0 31.0
6.07 2001/05/23 12:52:07 201.6 C2 10 693.0 48.0
5.80 2001/05/23 13:28:05 203.4 C2 11 699.0 74.0
May 23 2001 12:43:04 Paolo Laquale
paololaq@tin.it
Suspect object in LASCO C2 images (512x512)

The aspect is faint. Positions and dates are (0,0 top left corner)

X , Y
20010523_14:06(UT) 286,493
20010523_14:26(UT) 276,486
20010523_14:50(UT) 262,479
20010523_15:26(UT) 249,474

I don't know if the trajectory is a typical for a sungrazing comet

Regards Paolo Laquale
May 23 2001 12:57:04 Paolo Laquale
paololaq@tin.it
UPDATE

The object is visible in the image at 15:52 (UT) too.
Position is (0,0 top left corner)

X,Y
20010523_15:52(UT) 228,470

Regards Paolo Laquale
May 23 2001 12:59:58 Paolo Laquale
paololaq@tin.it
Excuse me, the image is in LASCO C2 (512x512)


Paolo
May 23 2001 14:06:05
 
May 23 2001 14:43:06 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I cannot confirm P. Laquale's latest claim. The velocity of the
reported positions and the variation in brightness both fail
to meet my criteria. That is, the 4th point is far brighter than
any of the other points. And, the velocity in the horizontal
direction is inconsistent, changing as follows (1 pixel/minute,
1.2 pixels/minute, 0.7 pixels/minute, 1.6 pixels/minute). Just
not realistic.

Doug
May 24 2001 05:59:14 michael boschat
aa063@chebucto.ns.ca
Something in C2 at 20010524_0250 UT
Probally noise, can't tell. Looks like
small nebula patch, mid-right of numbers.
x-coordinates are probably correct,but y-coordinates may be off
by several pixels. 0,477 in lower left corner.
C2 images Date & UT Size X and Y
20010524_0250.gif 512 x 512 262, 469
20010524_0326.gif 512 x 512 263, 464
20010524_0352.gif 512 x 512 265, 458
20010524_0406.gif 512 x 512 267, 453

Mike B.
If this looks funny it because I am using Lynx on the university
system and cannot open a web browser from home this way.
May 24 2001 08:24:29 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

While I do indeed see something 'fuzzy' in the first two images
indicated by M. Boschat, I don't see anything in subsequent frames.
What is it? I have no idea. Certainly I'm not willing to call
it a comet.

Doug
May 24 2001 08:49:16 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I have added a new link on the cometform.html page. It is a link
to a page that Mike Oates has created showing the trajectories
of the comets seen in LASCO C2 on a month by month basis. Note
how the Kreutz trajectory varies throughout the year and also
how the number of tracks also varies throughout the year.

http://www.ph.u-net.com/comets/c2paths.htm

Doug
May 24 2001 11:50:52 Scarmato Toni
toniscarmato@libero.it
Possible new faint comet on 3 consecutive LASCO C2 images.



Positions:512x512 (0,0) top-left corner.


2001/05/24 14:06 (232,506)
2001/05/24 14:26 (235,500)
2001/05/24 14:50 (237,494)



Comment: Faint but possible

I am waiting images to confirm.

Regards,

Toni Scarmato
May 24 2001 12:42:11 Sebastian Hoenig
sfhoenig@aol.com
Hi all.


Can anybody tell me what the bright object in the lowet left
corner right of th epylon is? Is it Aldeberan (alpha Tau)?
Or Jupiter (though expected to come in June)?

Sebastian
May 24 2001 13:47:40 Scarmato Toni
toniscarmato@libero.it
Dear Doug,


regarding my last report the object not seem visible on images at
15:25 and 15:52. Probably noise.


Toni
May 24 2001 13:57:58 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I am unable to find a comet at the positions indicated by
T. Scarmato for May 24. Also, the bright object at the very
bottom of the C3 images is Aldebaran.
May 24 2001 21:22:00 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C2 images - 20010524_2350 UT


Coordinates next post.

Michael Boschat
May 24 2001 21:27:29 michael boschat
aa063@chebucto.ns.ca
Here are the (approximate) XY coordinates of 

the object and an image of the area.

****** NOTE ******
x-coordinates are probably correct,
but y-coordinates may be off by
several pixels.


0,477 in lower left corner

LASCO C2 IMAGES

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010524_2350.gif 512 x 512 298, 478
20010525_0006.gif 512 x 512 299, 472
20010525_0026.gif 512 x 512 301, 467
20010525_0052.gif 512 x 512 303, 456

----------------
Michael Boschat
May 24 2001 22:57:20 Alexander Mimeev
alexpm@imail.ru
Sungrazer 2350...0128

Mimeev
May 24 2001 23:46:07 Alexander Mimeev
alexpm@imail.ru
Comet Boschat(1024x1024):


2350 592 7
0006 595 18
0026 600 31
0052 606 49
0128 613 73
Mimeev
May 25 2001 07:02:22 michael boschat
aa063@chebucto.ns.ca
There is a "fuzzy" object moving
along the mid-right bottom of the C2 images.
at 20010525_0952 at 308, 480 ( 512 size ).

BUT it is NOT a comet --- it is Saturn just out of the
field edge. Thought I would mention this.

Sorry about posting this Doug.

Mike B.
May 25 2001 09:15:15 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
I can confirm the comet reported by M. Boschat in C2 images from

May 24-25, 2001. It is very faint and will probably not be
visible in C3 images. Rough positions given below. Note also,
the positions given by M. Boschat are slightly off, at least in
the y-direction. The first position he reports is at pixel -1,
which of course would be off the image.

# HEIGHT DATE TIME ANGLE TEL FC COL ROW
6.23 2001/05/24 23:50:05 189.0 C2 10 591.0 7.0
6.10 2001/05/25 00:06:05 189.7 C2 10 596.0 18.0
5.97 2001/05/25 00:26:05 190.3 C2 10 599.0 30.0
5.75 2001/05/25 00:52:05 191.6 C2 10 606.0 50.0
5.48 2001/05/25 01:28:05 193.3 C2 10 614.0 74.0
5.32 2001/05/25 01:50:05 194.2 C2 10 618.0 89.0
5.19 2001/05/25 02:06:07 195.3 C2 10 623.0 101.0
5.04 2001/05/25 02:26:05 196.4 C2 10 627.0 115.0


Also, that is indeed Saturn peeking up into the C2 FOV moving
from left to right at the very bottom of the C2 images.
May 25 2001 09:18:20 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi all,

Using my editor's prerogative, here's a website you may find
of interest.

http://www.artraceinspace.com/toc.html

Doug
May 25 2001 11:09:21 Scarmato Toni
toniscarmato@libero.it
Possible comet in 4 consecutive C3 images.



Positions: 512x512 (0,0) top-left corner:

2001/05/25 13:18 (87,446)
2001/05/25 13:42 (88,445)
2001/05/25 14:18 (89,444)
2001/05/25 14:42 (91,442) (image B/W)


Comment: in the last image the object is well visible at
rigth of the pylon.

Regards,


Toni Scarmato
May 25 2001 12:17:25 Scarmato Toni
toniscarmato@libero.it
Doug, regarding my last report, the image at 15:39 show that

it is a real object, but I think that the apparent motion
toward the Sun is due to the pylon.
I think that is a star.


Toni
May 25 2001 13:59:59 Peretto ivo
naos2@tiscalinet.it
Dear Doug,

Suspect object in LASCO C2 images (512X512). The object is faint but it is visible in 10 images!
The positions are (0,0 upper left corner):

20010525_12:06 C2 X:85 Y:487
20010525_12:26 C2 X:87 Y:487
20010525_12:52 C2 X:89 Y:487
20010525_13:28 C2 X:93 Y:487
20010525_13:50 C2 X:95 Y:486
20010525_14:06 C2 X:97 Y:486
20010525_14:26 C2 X:99 Y:486
20010525_14:50 C2 X:101 Y:486
20010525_15:35 C2 X:105 Y:485
20010525_16:06 C2 X:108 Y:485

It is above the date (above the day). It's real but it has a very slow motion.

Regarding

Peretto Ivo
May 25 2001 14:39:26 Paolo Laquale
paololaq@tin.it
Dear Ivo,

the object is a star! note that the Y positions are constant.
The stars moving from left to right in LASCO C2 and C3 images!
Regards Paolo Laquale
May 25 2001 16:41:54 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi all,
Yes indeed, that is a star. Sorry, don't know which one.
This message is to inform everyone that both Derek and I will be
on travel next week, plus this weekend is a big holiday weekend
for those of us in the USA. So, we will be checking e-mail,
but don't expect any action from us until we return June 4. Any
actions we are able to take should be considered a bonus. Please
try to police yourselves and don't let the posts get out of control.
And please, be polite to each other.

Doug
May 25 2001 19:09:09 Peretto ivo
naos2@tiscalinet.it
Dear all,

thank you Paolo, now I know! Excuse for my last report!
Good holiday Doug
Peretto Ivo
May 25 2001 21:07:43 John Seach
jseach@bigpond.com
Possible new comet in LASCO C2 images.


Visible in 4 consecutive images moving toward the sun.

0,0 upper left corner

Date Time Tel Image Col Row
2001/05/25 22:06 C2 512 224 471
2001/05/25 22:26 C2 512 224 463
2001/05/25 23:06 C2 512 224 459
2001/05/25 23:56 C2 512 224 450

Object appears to flare, break up and fade.
Twin objects visible in images 22:26 and 23:06

John Seach
May 26 2001 02:44:43 Sebastian Hoenig
sfhoenig@aol.com
John,


Just checked your report. Seems to be a combination of noise and
(perhaps) a star. One thing is the same Doug mentioned at some of
the other reports: The relative motion of the object varies to
much. Indeed it deccelerates very much.

Regards, Sebastian
May 26 2001 11:46:47 Scarmato Toni
toniscarmato@libero.it
Possible comet in C2 images 512x512 (0,0) top-left corner



Positions:

2001/05/25 14:26 (344,508)
2001/05/25 14:50 (344,500)


Comment: the object seem to have a faint tail.


I am waiting other images to confirm


Toni Scarmato
May 26 2001 12:13:34 Scarmato Toni
toniscarmato@libero.it
SORRY!


Regarding my last report only noise.



Toni
May 26 2001 14:40:44 michael boschat
aa063@chebucto.ns.ca
Off topic-


I hope that some of "us" observers
( me included )will not post 1 or 2
XY's when we see something, unless
like Doug says on the form - a comet
his mother can recongize. I would
say to others re-read Doug's
words on this form on reporting.

Flame me by private email BUT be kind,
I was in the local store last night and
a robber came in said he had a bomb!
I'm still shaky
=(:o

Thanks...

Mike B.
May 27 2001 11:06:09 Alexander Mimeev
alexpm@imail.ru
Poss. comet 20010527 C2 Top/left 512*512


1026 4 103
1106 28 106
1126 40 108

Alexander
May 27 2001 11:24:53 Sebastian Hoenig
sfhoenig@aol.com
Alexander,


Your object vanishes in the image of 11:50. Also, its shape varies
in a unpredictable way. Therefore: It seems to be not real.

Sebastian
May 27 2001 13:38:02 michael boschat
aa063@chebucto.ns.ca
Possible comet C2 near LASCO logo 20010527_1626 UT
Coordinates next post
Mike B.
May 27 2001 13:48:50 Michael Oates
mike@ph.u-net.com
Possible comet in realtime C2 images

This is a very odd one, very diffuse and getting fainter
may not even show in the 4th image. The path is consistant
with a kreutz for this time of year.

(0,0 in bottom left corner in 1024x1024 images)

Image Col Row
20010527_1650_c2.gif 815 1001
20010527_1706_c2.gif 815 989
20010527_1726_c2.gif 816 972

Michael Oates
May 27 2001 13:53:19 michael boschat
aa063@chebucto.ns.ca
Here are the (approximate) XY coordinates of 

the object.

diffuse looking and obvious

****** NOTE ******
x-coordinates are probably correct,
but y-coordinates may be off by
several pixels.


0,477 in lower left corner

LASCO C2 IMAGES

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010527_1626.gif 512 x 512 407, 477
20010527_1650.gif 512 x 512 407, 472
20010527_1706.gif 512 x 512 408, 464
20010527_1726.gif 512 x 512 408, 457

Mike Boschat
May 27 2001 14:15:23 Sebastian Hoenig
sfhoenig@aol.com
Well, as being independent in this case I would say:


1. Yes, there is anything.
2. The object is not visible in the 16:26 UT image. If you compare
the relative movements it must be narrowly out of the FOV.
Indeed I could not identify it in the 1024 image (comparing
with brightness, shape, etc. There's a piece of noise in the
area but that's not the object)

3. Mike B and O, don't care about who will get credit. The object
isn't visible in the 17:50 UT image and therefore it violates
the 4 image limit for real objects. So this might be called the
3rd X/ comet this year.

Regards, Sebastian
May 27 2001 14:17:45 Michael Oates
mike@ph.u-net.com
UPDATE: Possible comet in realtime C2 images

Looks like Mike Boschat and myself have reported the same
object. But the image at 17:50 only shows a very faint smudge
where the comet should be, Mike Boschat indicates a position for
16:25, but that is not the object, it's too sharply defined
compared to the diffuse object and is noise. So I doubt very
much that this will be accepted as a comet as it does not meet
the minimum critera of 4 positions.

Michael Oates
May 27 2001 14:30:29 Michael Oates
mike@ph.u-net.com
UPDATE: 

Just a quickie, the comet is still visible in image 18:06
at X=818 Y=83 (0,0 bottom left in 1024 images)
Note in my report, I had the Y cooridinates inverted, sorry.
So there is a chance this may be excepted. It also looks like
Mike Boschat's original post is before mine.

Michael Oates
May 27 2001 14:35:10 michael boschat
aa063@chebucto.ns.ca
Update also:


Wow! talk about close. I took all the images
and reversed them to greyscale then to black on
white. I could see the "fuzzy" thing only on two images
even after enlarging the 512 to 1:2. But, as Sebastian
mentioned it's not there after 1750 UT and I also cannot
see it after that either.

Now, as to my 1626 UT observation, when I loop
images my eye catches the object, then I stop
and do a "manual" loop using my arrow keys, back and forth
like a blink comparitor, when I followed the object back
it looked like it was on the frames edge, that is why I
put the 1626 UT. Also I enlarge the 512 images 1:2
to see better, to get 1024 takes too long download with
a modem.

Please accept my apology for this long post...
One thing - it got rid of my migrane headache :)

Mike Boschat
May 27 2001 14:41:17 michael boschat
aa063@chebucto.ns.ca
I'm totally confused now!


Is it a Comet or not?

I just saw Mike Oates report saying - "yes"?
and I re-looped the images,
I see the fuzzy comet? nearing a star in the area but at
the 1806 UT image I can't see it. I just cannot download the
1024 images to look and get better quality and I am still
using the 512 enlarged to do this...

Mike Boschat - extremely confused as to what's happening!

May 27 2001 14:52:42 Sebastian Hoenig
sfhoenig@aol.com
Okay,


after amlsot not visible in 17:50 it is again visible in 18:06
and 18:26. So seems to be a real comet that undergoes a new
brightening.

Let's wait until Doug is back again - anything else would be
speculation.

Sebastian
May 27 2001 18:14:53 Alexander Mimeev
alexpm@imail.ru
Medium coordinates object (+/- 1 pixel):


1650 407 501 +
1706 407 495 +
1726 408 488 +
1750 409 477 ?
1806 409 471 +
1826 410 463 ?
1850 410 454 ?

Object? possible comet...

Alexander
May 28 2001 02:03:15 Sebastian Hoenig
sfhoenig@aol.com
Alexander,


look at the reports below.

Sebastian
May 29 2001 13:44:12 Scarmato Toni
toniscarmato@libero.it
Possible comet in C2 images at positions:



512x512 (0,0) top-left corner:


2001/05/29 15:50 (390,442)
2001/05/29 16:06 (390,436)
2001/05/29 16:26 (390,430)


I am waiting other images to confirm


Toni Scarmato
May 29 2001 14:03:56 Sebastian Hoenig
sfhoenig@aol.com
Toni,


Congratulations! Your object indeed is a comet. It entered at
the C2 FOV at 12:06 and is visible in almost 15 images.

Regards, Sebastian
May 29 2001 14:18:28 Scarmato Toni
toniscarmato@libero.it
Yes Sebastian. Thanks.


I saw now the object enter in C2 field of view at 12:06.

It is a Kreutz comet?


Toni

May 29 2001 14:29:44 michael boschat
aa063@chebucto.ns.ca
Possible comet in C2 at 20010529_1706 UT





****** NOTE *****
x-coordinates are probably correct,
but y-coordinates may be off by
several pixels.0,477 in lower left corner LaSCO C2 Images
20010529_1706.gif 512 x 512 262, 476
20010529_1726.gif 512 x 512 262, 472

Mike Boschat
May 29 2001 14:35:25 Scarmato Toni
toniscarmato@libero.it
Another possible comet visible on images C3 B/W at positions:



512x512 (0,0) top-left corner:


2001/05/29 16:18 (149,490)
2001/05/29 17:18 (152,481)
2001/05/29 17:42 (153,477)

The object move toward the sun and is wel visible on the last
two images.


Toni Scarmato
May 29 2001 14:51:16 michael boschat
aa063@chebucto.ns.ca
DISREGARD LAST POST - NOISE


Mike B.
May 29 2001 14:53:16 Scarmato Toni
toniscarmato@libero.it
SORRY! The object in C3 regarding my last report is noise.


Toni
May 30 2001 04:48:47 Scarmato Toni
toniscarmato@libero.it
UPDATE Comet 2001/05/29 12:06-17:06



Positions 512x512 (0,0) top-left corner:

2001/05/29 12:06 (378,509)
2001/05/29 12:26 (380,503)
2001/05/29 12:50 (382,496)
2001/05/29 13:27 (383,486)
2001/05/29 13:50 (384,478)
2001/05/29 14:06 (385,473)
2001/05/29 14:26 (386,467)
2001/05/29 14:50 (387,461)
2001/05/29 15:26 (389,449)
2001/05/29 15:50 (390,441)
2001/05/29 16:06 (390,436)
2001/05/29 16:26 (391,430)
2001/05/29 16:50 (392,422)
2001/05/29 17:06 (392,416)


I have searched in C3 but on 512 pixels images the comet
is not visible.


Regards,

Toni Scarmato
May 31 2001 04:15:55 Bharat Adur
bharatadur@hotmail.com
676 734

673 735
673 736
661 739
Is it a comet? I think so
Could you please confirm.
How faint star could you pick up here
Bharat
May 31 2001 05:39:20 Sebastian Hoenig
sfhoenig@aol.com
For confirmation we need time of images and LASCO camera.


Sebastian
May 31 2001 06:07:58 Sebastian Hoenig
sfhoenig@aol.com
Bharat,


I haven't got any idea what images or camera you think of and
where the origin of your coordinates is but although there are
some reasons why you haven't spot a comet:

Your relative movement varies very tough. If - and I think so -
the images are consecutive this is very unphysical for a real
object. There's also a inconsistance in the trail. Your last
x-position "jumps" very much to the right.

Regards, Sebastian
May 31 2001 09:34:57 Scarmato Toni
toniscarmato@libero.it
Possible comet visible in 4 consecutive LASCO C3 images



Positions 512x512 (0,0) top-left corner


2001/05/31 11:18 (440,375)
2001/05/31 11:42 (439,373)
2001/05/31 12:18 (438,371)
2001/05/31 12:42 (437,369)

Comment: the object move toward the sun and change in
brigthness in regular way.

I am waiting other images to confirm.

Regards
Toni Scarmato
May 31 2001 11:20:17 Sebastian Hoenig
sfhoenig@aol.com
Toni,


I checked the images and it looks like noise as the object
vanishes and reappears in the 1024 images. Indeed I could not
find it in almost 2 images (down to the background noise level)
and therefore there's no confident development in brightness.

Regards, Sebastian
May 31 2001 13:01:11 Scarmato Toni
toniscarmato@libero.it
I am back in my office now.


Regarding my last post
I am in agreement with Sebastian, also if the object seem
to be visible on images from 13:42 to 16:18
"there's no confident development in brightness".
Probably noise.


Toni Scarmato
May 31 2001 23:28:40 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C2 images - 20010601_0054 UT


Coordinates next post.

Michael Boschat
May 31 2001 23:55:09 michael boschat
aa063@chebucto.ns.ca
Here are the (approximate) XY coordinates of 

the object.

****** NOTE ******
x-coordinates are probably correct,
but y-coordinates may be off by
several pixels.


0,477 in lower left corner

LASCO C2 IMAGES

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010601_0054.gif 512 x 512 410, 474
20010601_0131.gif 512 x 512 410, 467
20010601_0154.gif 512 x 512 410, 457
20010601_0206.gif 512 x 512 410, 452
20010601_0230.gif 512 x 512 409, 411

Mike Boschat