SOHO-LASCO Comet Reports for 200104

Apr 01 2001 01:31:50 Marcus Schappi
schappim@bigpond.com


x 74
y 129
(when taken from original image)
from 2001/02/30 01:27 C2

(It is brightest in this frame)

It does appear in more than 4 frames and makes a more or less
horizontal traverse.
Apr 01 2001 13:55:06 Scarmato Toni
toniscarmato@libero.it
Possible sungrazer comet visible on 5 consecutive

LASCO C3 images 1024x1024 (0,0) top-left corner
near the coronograph:

Approximate positions:

2001/04/01 14:42 (461,584)
2001/04/01 15:18 (462,581)
2001/04/01 15:42 (463,478)
2001/04/01 16:18 (464,476)
2001/04/01 16:42 (465,474)


Regards,

Toni Scarmato
Apr 02 2001 11:48:14 Xavier Leprette
xavier.leprette@education.gouv.fr

Possible sungrazer comet in a real-time C2 images now.

It is faint and visible in 3 consecutive images from 2001/04/02
from 14:06 to 14:50 UT in bottom left quadrant on 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
Apr 02 2001 12:03:58 Xavier Leprette
xavier.leprette@education.gouv.fr
Possible sungrazer comet in a real-time C2 images 

(More information about the previous message)

It is faint and visible in 4 consecutive images from 2001/04/02
from 14:06 to 15:06 UT in bottom left quadrant on the right of the date.
The object is small, faint, fuzzy without obvious tail.
It is more faint on the third and fourth image.

Approximate positions measured from the top-left corner
of a 1024x1024 frames :
col, row
2001/04/02 14:06 UT 354, 1014
2001/04/02 14:26 UT 370, 994
2001/04/02 14:50 UT 389, 969
2001/04/02 15:06 UT 400, 954

Xavier Leprette
Apr 02 2001 12:16:35 Scarmato Toni
toniscarmato@libero.it
Possible comet sungrazer in LASCO C3 images 512x512 (0,0) top-left corner at approximate positions:



2001/04/02 12:18 (160,304)
2001/04/02 12:42 (162,302)
2001/04/02 13:42 (165,298)
2001/04/02 14:18 (167,296)
2001/04/02 14:42 (169,294)


Toni Scarmato
Apr 02 2001 12:38:33 Sebastian Hoenig
sfhoenig@aol.com
Concerning today's two posts:


1. Toni's onject is not visible in the images of 14:18 and 15:42.
The positions of 12:42 and 13:42 seems to spot a star.

2. I can confirm Xavier`s possible comet in C2 but I don't
congratulate so for (Nothing against you Xavier ;-)) ) The
problem is that it is definitively visible in only 4 images
and not more so possobly Doug won't call it a confirmed comet.
(If he confirms I will congratulate you, of course Xavier!)

Regards, Sebastian
Apr 02 2001 12:41:00 Sebastian Hoenig
sfhoenig@aol.com
Corrigendum:


in the item concerning Toni's post it must be "Toni's object is
not visible in the images of 15:18 and 15:42."

Sebastian
Apr 02 2001 15:24:25 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Regarding the recent posts:


I'm not able to confirm any of the claims, except for X. Leprette's
claim for a C2 object on April 2. However, I'm reserving
judgement on that one. I want to do a thorough check of the C3
data.

Doug
Apr 03 2001 08:50:25 Sebastian Hoenig
sfhoenig@aol.com
OFF TOPIC: Some statistics


Hi all.

I have collected all the discovery information I could find and
made little statistics about who made how many discoveries:

members.aol.com/sfhoenig/rank.html

Please send my all the mistakes you can find.

Regrads and thanks.

Sebastian
Apr 03 2001 09:59:08 Scarmato Toni
toniscarmato@libero.it
Dear Doug,


regarding my following report

"Possible sungrazer comet visible on 5 consecutive
LASCO C3 images 1024x1024 (0,0) top-left corner
near the coronograph:

Approximate positions:

2001/04/01 14:42 (461,584)
2001/04/01 15:18 (462,581)
2001/04/01 15:42 (463,478)
2001/04/01 16:18 (464,476)
2001/04/01 16:42 (465,474)"

I found a suspect object in 5 consecutive LASCO C2 images
1024x1024 (0,0) top-left corner at positions:


2001/04/01 15:06 (118,1006)
2001/04/01 15:26 (119,1002)
2001/04/01 15:50 (121,996)
2001/04/01 16:06 (123,991)
2001/04/01 16:26 (125,985)

It can to be the same object?


Regards,

Toni Scarmato
Apr 03 2001 16:53:30 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I'm unable to confirm the T. Scarmato claims for a comet in C2 and
C3 on April 1, 2001. Note, only extremely bright comets can
be observed close to the occulter in C3 (such as the positions
indicated by Toni.) That region of the images is heavily vignetted,
that is, shadowed. So, any object you can see close to the
occulter should be visible further out in C3. Here's my
suggestion, never look for comets in C3 within about
150 pixels of the center of the image.

Doug
Apr 04 2001 05:15:31 Scarmato Toni
toniscarmato@libero.it
Possible brigth comet visble on LASCO C3 images

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

Positions


2001/04/04 01:42 (222,884)


There is too noise but seem a real object.
Other positions at next e-mail.


Regards,

Toni Scarmato
Apr 04 2001 05:48:58 Scarmato Toni
toniscarmato@libero.it
Comment on my last report.



Correct positions: 1024x0124 (0,0) top-left corner

2001/04/04 01:42 (226,884)
2001/04/04 02:18 (235,880)

On image at 02:18 the object seem to have a tail but
on image at 00:42 the object is not visible.


I am waiting other images to confirm.


Toni
Apr 04 2001 06:16:08 Scarmato Toni
toniscarmato@libero.it
Sorry!!!!


no comet, only noise regarding my last report.


Toni Scarmato
Apr 05 2001 14:50:03 Scarmato Toni
toniscarmato@libero.it
Suspect object moving toward the sun visible on 3

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

Positions:

2001/04/05 11:18 (121,460)
2001/04/05 12:18 (122,456)
2001/04/05 12:42 (124,453)


I am waiting other images to confirm.

Regards,

Toni Scarmato
Apr 05 2001 15:25:14 Scarmato Toni
toniscarmato@libero.it
Dear Doug,


I Have read your suggestion in the last post,
but I want to post this report because the object seem
brigth in the images 512x512 also if it is too near the disk.
Moreover seem visible on 6 consecutive LASCO C3 images

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

2001/04/05 09:18 (222,304)
2001/04/05 09:42 (224,302)
2001/04/05 10:42 (227,298)
2001/04/05 11:18 (229,296)
2001/04/05 12:18 (232,294)
2001/04/05 12:42 (234,292)

The object seem change in brigthness in reliable way and
no change in shape.
If it is real, I think that is also visible in C2.
In this moment I Have a low connetion to controll.

Regards,

Toni Scarmato

Apr 05 2001 17:13:24 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I am again unable to confirm the reports of objects visible in
images from 01/04/05. Sorry.

Doug
Apr 06 2001 09:33:06 Scarmato Toni
toniscamato@libero.it
Suspect object enter in the field of C3 at 07:42 and seem

visible on 6 consecutive images 512x512 (0,0) top-left
corner at approximate position:


2001/04/06 07:42 (2,336)
2001/04/06 08:18 (4,335)
2001/04/06 08:42 (6,334)
2001/04/06 09:18 (7,333)
2001/04/06 09:42 (8,332)
2001/04/06 10:42 (11,330)

The object seem moving toward the sun but it is faint and
can to be a star.
I not Have a fast connetion to download images a 1024 to verify.

Regards,

Toni Scarmato
Apr 06 2001 10:02:56 Sebastian Hoenig
sfhoenig@aol.com
Possible comet in LASCO C3, starting 20010506_1118_c3.gif


Date: Apr 06, 2001

Description:
medium bright comet, moderately condensed, right of the pylon,
just entered the C3 FOV

Positions: (0,0) upper left, 1024 x 1024

Time (x,y)

11:42 217,932
12:42 228,927

That's just to get the positions posted. More on this soon
(Either :-))) or :-((( )

Sebastian Hoenig
Apr 06 2001 10:08:14 Sebastian Hoenig
sfhoenig@aol.com
DISREGARD LAST MESSAGE!!!!


Oh dear! I again mixed up images of different days. It`s the
second time I did so. I first thought that object is in 4 images
but 2 of dem where of a wrong date.

SORRY!!

Sebastian
Apr 06 2001 10:19:13 michael boschat
aa063@chebucto.ns.ca
Is there a comet or not? I'm

trying to figure the form report
out before I download all the
images..

thanks... use private email

Mike Boschat
Apr 06 2001 10:34:32 Scarmato Toni
toniscarmato@libero.it
Regarding my last report I have download other images but I am 

not able to see the motion of the point in 512 images.
Seem a combination of faint stars and noise.
Are necessary images at 1024 to verify.

Regarding the report of Sebastian I see two point at positions:

512x512 (0,0) top-left corner

2001/04/06 12:18 (98,466)
2001/04/06 12:42 (101,458)


Regards,

Toni Scarmato
Apr 06 2001 11:13:16 Sebastian Hoenig
sfhoenig@aol.com
Again to everybody:


Do NOT consider my report!!!

Sebastian
Apr 06 2001 14:52:07 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010406_1618 UT


I think this is probally not a comet
but noise, it just moves
in a line -- to me anyways,
but towards the pylon and NOT
towrads the sun.

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.


0,460 in lower left corner

LASCO C3 IMAGES

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010406_1618.gif 512 x 512 162, 295
20010406_1642.gif 512 x 512 165, 294
20010406_1747.gif 512 x 512 169, 294
20010406_1818.gif 512 x 512 173, 292

----------------
Michael Boschat
Apr 06 2001 23:38:30 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010407_0018 UT


No new images have come in and
it now is 0340 UT so I am sending
this out. I'm very tired and going
to bed. I have a bad feeling the next
images will be in late.

The object is passing above a bright star
( can't miss the star ) about 1/4 way on lower
left side of the pylon.

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.


0,460 in lower left corner

LASCO C3 IMAGES

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010407_0018.gif 512 x 512 69, 326
20010407_0042.gif 512 x 512 71, 324
20010407_0142.gif 512 x 512 75, 323

----------------
Michael Boschat
Apr 07 2001 06:53:44 michael boschat
aa063@chebucto.ns.ca
DISREGARD MY LAST 2 POSTINGS OF;;;


Apr 06 2001 23:38:30

Apr 06 2001 14:52:07


No comet detected after new images came in.

Thank you

Mike Boschat
Apr 07 2001 08:52:40 Scarmato Toni
toniscarmato@libero.it
Possible comet in real-time images 51x512 (0,0) top-left 

corner visible on 4 consecutive Lasco C3 images at
positions:


2001/04/07 09:39 (97,368)
2001/04/07 10:36 (100,365)
2001/04/07 11:32 (102,363)
2001/04/07 12:04 (104,361)


I am waiting othr image to confirm.


Regards,

Toni Scarmato
Apr 07 2001 10:08:08 Scarmato Toni
toniscarmato@libero.it
Regarding my last report:


I Have download other images and "I think" to see the point
moving on a reliable orbit, but I am not sure, too noise on
images at 512 pixels.

Positions:

2001/04/07 12:25 (105,359)
2001/04/07 12:57 (107,357)
2001/04/07 13:18 (108,355)

I Have noted also a variation of the shape.

Regards,

Toni Scarmato
Apr 07 2001 17:53:09 Michael Oates
mike@ph.u-net.com
Report of Archive double comets from 7 Nov 1998


This is a serendipitous discovery.

I am writing an article and as part of this I am cataloguing
all the twin/multiple comets found with SOHO. There were some
comets for which I did not have the images for, so I downloaded
them, and while looking for the twin comets of 1998/11/07;
C/1998 V2 (SOHO-252) and C/1998 V3 (SOHO-253) discovered by
X.Leprette, I found quite by chance, a another double comet.

This pair are very close, the fainter one following on immediately
behind the first, slightly brighter one. Both are faint and
diffuse with no tails evident. They precede the known comets by
a short time, the known comets are in image 22037744.fts

0,0 in bottom left corner of 1024x1024 images.

First comet
Image Col Row Time Date
22037740.fts 703 17 05:18:05.618 1998/11/07
22037741.fts 679 44 05:54:05.997 1998/11/07
22037742.fts 662 64 06:18:05.783 1998/11/07
22037743.fts 639 89 06:50:07.065 1998/11/07
22037744.fts 617 117 07:25:31.844 1998/11/07 Position uncertain


Second comet (right behind the first)
Image Col Row Time Date
22037740.fts 707 12 05:18:05.618 1998/11/07
22037741.fts 681 40 05:54:05.997 1998/11/07
22037742.fts 667 59 06:18:05.783 1998/11/07
22037743.fts 646 85 06:50:07.065 1998/11/07
22037744.fts --- --- 07:25:31.844 1998/11/07

Michael Oates
Apr 08 2001 14:13:17 Sebastian Hoenig
sfhoenig@aol.com
VERY BRIGHT COMET IN C2 IMAGES!!!!


I just checked the b/w (telemetry) images on the LASCO homepage
and found a very bright comet in those images not yet published
in the normal resolutions.

The comet obviously was hidden behind the C3 pylon.

Images: at least 17:54, 18:06!!!

If normal pictures are out I will gif proper positions.

An animation is posted on my webpage in about 10 minutes:

members.aol.com/sfhoenig/c2.gif

Regards, Sebastian Hoenig
Apr 08 2001 14:20:04 Sebastian Hoenig
sfhoenig@aol.com
VERY BRIGHT COMET IN C2 IMAGES!!!!

(additional information)

Just to be correct:

The positions on the b/w images:

17:54 94,471
18:06 100,465

Regards,

Sebastian
Apr 08 2001 14:40:30 Sebastian Hoenig
sfhoenig@aol.com
VERY BRIGHT COMET IN C2 IMAGES!!!!

(additional information, no. 2)

After making some estimations extrapoliting the positions I think
the comet must have entered the C2 FOV abround 15:54 or 16:08
today (Apr 08, 2001).

The fullsize animation on my webpages has around 300kB. So I will
show the comet in another animation using only a part of the
whole images. I will add new images to the animatian as soon as
they come in.
It's difficult to work with b/w images as there is no archive to
download earlier images. So this is really "realtime" ;-))

In few minutes you will find everything on

members.aol.com/sfhoenig/apr08.html

Regards, Sebastian
Apr 08 2001 16:47:32 Sebastian Hoenig
sfhoenig@aol.com
VERY BRIGHT COMET IN C2 IMAGES!!!!

(additional information, no. 3)

I collected some positions for the comet in the b/w images and
transposed it into regular 512x512 C2 images. So I will give you
time, b/w position and calculated/estimated positions in 512
images (may be off by +/-4 pixel):

Time b/w image approximate
postion 512 position

17:54 94,471 94,427
18:06 100,466 100,420
18:30 111,456 111,412
18:54 122,446 122,402
19:31 141,429 141,385
19:54 152,419 152,375
20:06 159,413 159,369
20:29 171,402 171,358

Let's see how good this estimations and calculations are.

In the low resolution images no fragment or any following comet
is visible till 20:29 UT.

Regards, Sebastian

Note: If you want to have al look at the possible comet:
members.aol.com/sfhoenig/apr08.html

Apr 09 2001 03:53:28 terry lovejoy
lovejoyt@ozemail.com.au
Sebastian,


I can definitely confirm a bright comet (similiar to
the bright one in late April last year). Excellent
find Sebastian!

Regards,

Terry.

Apr 09 2001 09:15:33 Sebastian Hoenig
sfhoenig@aol.com
Regarding my estimated/calculated positions:


They seem to be off by 6 pixel in y-direction. I have got
one image for comparison yet:

512, 0,0 upper left

Time x,y
20:29 171,352

(20:54 184,340)

Regards, Sebastian
Apr 09 2001 09:52:47 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Congratulations Sebastian (and shame on everyone).

The very bright comet reported by S. Hoenig was indeed visible
in C3. Of course, the vignetting due to the pylon obscured
the comet enough to make it harder to see. Though I know most
of you have seen comets much fainter than this one. Oh well,
it's to be expected that the pylon will cause us problems at
this time of year.

Doug

Rough positions given below:

# HEIGHT DATE TIME ANGLE TEL FC COL ROW
24.45 2001/04/07 12:57:53 132.0 C3 10 202.0 248.0
24.29 2001/04/07 13:18:23 132.0 C3 10 204.0 250.0
23.74 2001/04/07 14:16:36 132.0 C3 10 211.0 256.0
23.44 2001/04/07 14:49:03 132.3 C3 10 216.0 258.0
23.19 2001/04/07 15:09:34 132.2 C3 10 219.0 261.0
22.99 2001/04/07 15:41:57 132.1 C3 10 221.0 264.0
22.82 2001/04/07 16:02:28 132.1 C3 10 223.0 266.0
22.44 2001/04/07 16:34:51 132.1 C3 10 228.0 270.0
22.23 2001/04/07 16:55:23 132.2 C3 10 231.0 272.0
21.95 2001/04/07 17:27:52 132.1 C3 10 234.0 276.0
21.70 2001/04/07 17:48:26 132.0 C3 10 237.0 279.0
21.40 2001/04/07 18:20:58 132.3 C3 10 242.0 281.0
21.15 2001/04/07 18:42:05 132.3 C3 10 245.0 284.0
20.66 2001/04/07 19:42:07 132.2 C3 10 251.0 290.0
20.28 2001/04/07 20:18:05 132.3 C3 10 256.0 294.0
20.07 2001/04/07 20:42:05 132.4 C3 10 259.0 296.0
19.74 2001/04/07 21:23:00 132.3 C3 10 263.0 300.0
19.45 2001/04/07 21:43:37 132.4 C3 10 267.0 303.0
19.16 2001/04/07 22:18:05 132.5 C3 10 271.0 306.0
18.54 2001/04/07 23:18:13 132.5 C3 10 279.0 313.0
18.30 2001/04/07 23:42:31 132.5 C3 10 282.0 316.0
17.92 2001/04/08 00:18:05 132.6 C3 10 287.0 320.0
17.68 2001/04/08 00:42:05 132.5 C3 10 290.0 323.0
17.06 2001/04/08 01:42:09 132.6 C3 10 298.0 330.0
16.69 2001/04/08 02:18:06 132.7 C3 10 303.0 334.0
16.40 2001/04/08 02:42:05 132.8 C3 10 307.0 337.0
16.03 2001/04/08 03:18:24 132.9 C3 10 312.0 341.0
15.79 2001/04/08 03:42:05 132.8 C3 10 315.0 344.0
15.46 2001/04/08 04:18:05 132.8 C3 10 319.0 348.0
14.84 2001/04/08 05:18:14 132.8 C3 10 327.0 355.0
14.56 2001/04/08 05:42:05 132.9 C3 10 331.0 358.0
14.19 2001/04/08 06:18:05 133.1 C3 10 336.0 362.0
13.86 2001/04/08 06:42:06 133.0 C3 10 340.0 366.0
13.21 2001/04/08 07:42:07 132.9 C3 10 348.0 374.0
12.80 2001/04/08 08:18:06 133.5 C3 10 355.0 377.0
12.52 2001/04/08 08:42:05 133.3 C3 10 358.0 381.0
12.15 2001/04/08 09:18:05 133.1 C3 10 362.0 386.0
11.87 2001/04/08 09:42:05 133.2 C3 10 366.0 389.0
11.14 2001/04/08 10:42:11 132.7 C3 10 374.0 399.0
10.73 2001/04/08 11:18:05 133.5 C3 10 381.0 402.0
10.44 2001/04/08 11:42:05 133.6 C3 10 385.0 405.0
9.96 2001/04/08 12:18:05 133.6 C3 10 391.0 411.0
9.68 2001/04/08 12:42:06 132.8 C3 10 393.0 416.0
8.90 2001/04/08 13:42:10 133.4 C3 10 404.0 424.0
8.04 2001/04/08 14:54:00 133.9 C2 11 33.0 46.0
7.91 2001/04/08 15:06:05 133.9 C2 11 41.0 53.0
7.61 2001/04/08 15:30:01 134.1 C2 11 61.0 70.0
7.30 2001/04/08 15:54:01 134.2 C2 11 81.0 87.0
7.13 2001/04/08 16:06:05 134.4 C2 11 92.0 96.0
6.82 2001/04/08 16:30:00 134.5 C2 11 112.0 113.0
6.48 2001/04/08 16:54:03 134.7 C2 11 133.0 132.0
6.33 2001/04/08 17:06:05 134.7 C2 11 143.0 141.0
5.99 2001/04/08 17:29:59 135.0 C2 11 165.0 159.0
5.63 2001/04/08 17:54:04 135.2 C2 11 187.0 179.0
5.45 2001/04/08 18:06:05 135.3 C2 11 198.0 189.0
5.10 2001/04/08 18:30:00 135.7 C2 11 221.0 208.0
4.71 2001/04/08 18:54:00 135.8 C2 11 244.0 230.0
4.10 2001/04/08 19:31:48 136.4 C2 11 282.0 264.0
3.72 2001/04/08 19:54:01 136.8 C2 11 305.0 285.0
3.51 2001/04/08 20:06:05 137.2 C2 11 318.0 296.0
3.10 2001/04/08 20:29:59 137.8 C2 11 343.0 319.0
2.70 2001/04/08 20:54:00 138.6 C2 11 367.0 341.0

Apr 09 2001 11:08:01 michael boschat
aa063@chebucto.ns.ca
Possible "fragment" or tail seperation

from the comet in C2 images - 20010408_2029 UT


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

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


0,460 in lower left corner

LASCO C2 IMAGES

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010408_2029.gif 512 x 512 122, 369
20010408_2054.gif 512 x 512 137, 356
20010408_2133.gif 512 x 512 161, 334
20010408_2155.gif 512 x 512 176, 322

------

Michael Boschat
Apr 10 2001 15:43:35 Michael Oates
mike@ph.u-net.com
Possible realtime sungrazer in C2


Faint and diffuse.

0,0 in bottom left corner of 1024x1024 images

Image Col Row
20010410_1754_c2.gif 110 52
20010410_1806_c2.gif 119 61
20010410_1829_lastimg_C2.bmp 139 78
20010410_1854_lastimg_C2.bmp 159 98

The last 2 images are from the realtime 512 b+w images and
I have scaled them up to 1024 for measuring. The positions
for these two images are not accurate.

Michael Oates
Apr 10 2001 15:51:20 Michael Oates
mike@ph.u-net.com
Possible realtime sungrazer in C2 UPDATE

(Correction: This is a comet! I have no doubt in my mind)

Faint and diffuse.

0,0 in bottom left corner of 1024x1024 images

Image Col Row
20010410_1729_c2.gif 90 34 Partially hidden behind '1'
20010410_1754_c2.gif 110 52
20010410_1806_c2.gif 119 61
20010410_1829_c2.gif 139 78
20010410_1854_c2.gif 159 98

The last 2 images were measured correctly, I now have the
gif images.

Michael Oates
Apr 10 2001 17:48:45 Sebastian Hoenig
sfhoenig@aol.com
Well, seems like Mike has found the nugget within the snow.


I can confirm the object reported by Mike Oates. Looking
carefully the images makes me think of there is something close
behind. But obviously that's the comet's tail.

Regards, Sebastian
Apr 11 2001 10:28:33 Kazimieras Cernis
cernis@itpa.lt
Similar to comet object is right now in C2 so

I am waiting for other images.
Possible realtime sungrazer in C2 b/w image
0,0 in bottom left corner of 512x512 image
Col Row
20010411_1331_c2.gif 104 50
20010411_1354_c2.gif ... ...

Coordinates may be not very correct.
Object is bright, diffuse and elongated.
Kazimieras Cernis
Apr 11 2001 11:10:18 Scarmato Toni
toniscarmato@libero.it
Suspect object enter in C3 field at 2001/04/11 11:18 and

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

Positions:

2001/04/11 11:18 (53,422)
2001/04/11 11:42 (55,420)
2001/04/11 12:18 (57,418)
2001/04/11 12:42 (58,416)

I am waiting other images.

Regards,

Toni Scarmato
Apr 11 2001 11:32:29 Kazimieras Cernis
cernis@itpa.lt
Do not consider my last report.

Kazimieras
Apr 11 2001 11:34:35 Scarmato Toni
toniscarmato@libero.it
Possible comet in real-time C2 images 512x512 (0,0) top-left

corner visible on 5 consecutive images

2001/04/11 12:06 (194,499)
2001/04/11 12:30 (195,492)
2001/04/11 12:54 (196,486)faint?
2001/04/11 13:31 (197,476)
2001/04/11 13:54 (197,469)


Regards,

Toni Scarmato
Apr 11 2001 11:51:07 Sebastian Hoenig
sfhoenig@aol.com
Regarding Toni's claims:


I cannot confirm any of the reports: That one in C2 is a single
dot varying very much in brightness and the one in C3 is obviously
somthing down in the noise.

Regards, Sebastian
Apr 11 2001 12:00:01 Scarmato Toni
toniscamato@libero.it
I am in agreement with Sebastian regarding my report on C3

images, but regarding the C2 report, also if the image at
2001/04/11 12:54 show a variation in brigthness,
the object seem visible also on image at

2001/04/11 14:06 (197,464)

Regards,

Toni Scarmato
Apr 12 2001 09:00:52 Doug Biesecker
Doug Biesecker
Sorry, meant to post this yesterday.  I forgot.


The latest confirmed comets are as follows:

COMET DATE TELE DISCOVERER
302 98/11/07 C2 M. Oates
303 01/04/7-8 C3, C2 S. Hoenig
304 01/04/10 C2 M. Oates

SOHO-302:
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
6.34 1998/11/07 05:18:05 192.5 C2 10 703.0 16.0
5.94 1998/11/07 05:54:05 191.0 C2 10 679.0 43.0
5.66 1998/11/07 06:18:05 190.0 C2 10 663.0 63.0
5.28 1998/11/07 06:50:07 188.3 C2 10 640.0 89.0

SOHO-304
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
7.68 2001/04/10 17:29:59 138.3 C2 10 90.0 34.0
7.39 2001/04/10 17:54:01 138.7 C2 10 110.0 49.0
7.21 2001/04/10 18:06:05 138.7 C2 10 120.0 61.0
6.92 2001/04/10 18:29:59 139.0 C2 10 139.0 77.0
Apr 12 2001 11:22:34 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I'm in agreement with Sebastian. I cannot confirm T. Scarmato's
claims of a comet in C2 on April 11, 2001.

Also, sorry, I didn't put my last post in red. My mistake.

Doug
Apr 12 2001 11:33:59 Scarmato Toni
toniscarmato@libero.it
Possible comet on LASCO C3 images 512x512 (0,0) top-left

corner well visible at positions:

2001/04/12 05:18 (210,395)
2001/04/12 05:42 (211,391)


The object moving toward the sun.
I am waiting other images to confirm.

Regards,

Toni Scarmato
Apr 12 2001 11:43:48 Scarmato Toni
toniscarmato@libero.it
Not consider my last report, is noise.  Sorry!!!



Toni
Apr 12 2001 12:40:37 Scarmato Toni
toniscarmato@libero.it
Possible comet in LASCO C2 image at positions:



2001/04/12 13:54 (118,481)


Seem to have a tail.


Other information at next post


Toni Scarmato
Apr 12 2001 12:51:31 Scarmato Toni
toniscarmato@libero.it
Dear Doug,


I Have found this two points in agreement with the postion
of the possible new comet of my last report.


2001/04/12 14:06 (138,454)
2001/04/12 14:30 (154,433)


Look well the image at 2001/04/12 13:52 I not have doubts
but the last word is your word.

I am searching in C3 to find the comet.


Regards,

Toni
Apr 12 2001 13:12:07 Scarmato Toni
toniscarmato@libero.it
Complete set of positions of the suspect new comet on

LASCO C2 images 512x512 (0,0) top-left corner:


2001/04/12 13:52 (118,481)
2001/04/12 14:06 (138,455)
2001/04/12 14:30 (153,433)


I continue to search in C3.


Regards,

Toni Scarmato
Apr 12 2001 13:58:59 Sebastian Hoenig
sfhoenig@aol.com
Regarding Toni's report:


The object he thinks of is just noise of the recent particle
storm. Two things against a comet:
1. Rapid change in brightness and shape
2. Inconsistant positions

I think we should be careful with reports through the snow.

Regards, Sebastian
Apr 13 2001 03:58:07 Scarmato Toni
toniscarmato@libero.it
Regarding my last report, finally this morning I Have

download the images at 1024 pixel.
I am partially in agreement with Sebastian.
I Have noted that, generally, the "tail" of the cosmic ray
are not diffuse.
On images at 512 pixel the tail of the object reported is
diffuse and on images at 1024 seem not visible.
Moreover, on 512 image at 2001/04/12 13:31 (103,487),
near the number 1 of the day (12) there is a brigth point that seem in agreement.
Yet, there is a remarkable variation in shape that is against
the ipotesis of comet.


Toni
Apr 13 2001 04:07:00 Scarmato Toni
toniscarmato@libero.it
Suspect object enter in C3 field at 2001/04/12 21:18.

Is diffuse and travel toward the sun near the pilon at rigth.

Positions: 1024x1024 (0,0) top-left corner

2001/04/12 21:18 (170,907)
2001/04/12 21:42 (172,908)

If it is a real object can to be obscured by the pilon.
I am waiting other iamges to confirm.


Regards,

Toni
Apr 13 2001 08:56:58 Scarmato Toni
toniscarmato@libero.it
Sorry!!!


Regarding my last report the second position is:


2001/04/12 21:42 (172,900)

Toni
Apr 13 2001 11:05:56 Scarmato Toni
toniscarmato@libero.it
Regarding my last report I see a diffuse object at

position 2001/04/13 00:42 (182,883) but on previous images
I not am able to find the object.


Regards,

Toni
Apr 13 2001 13:59:02 Paolo Laquale
paololaq@tin.it
There is a faint object in a 3 LASCO C2 B/W images at positions


X,Y : 164,195 (01 Apr 13; 14:30 UT)
X,Y : 169,192 (01 Apr 13; 15:30 UT)
X,Y : 177,185 (01 Apr 13; 16:30 UT)
In the second image (15:30 UT) the object is bright and diffuse
because enter in the solar flare. It is a comet ?

Regards : Paolo Laquale
Apr 13 2001 16:07:29 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I am unable to confirm any of the recent reports. Note, many of
these contain fewer than 4 images. If it's not in 4 consecutive
images, it's porbably not real.

As for P. Laquale's claim for April 13, there is no flare or CME
at 15:30. I checked the images assuming the origin of the
measurements was in both the top left and the bottom left and
could find nothing convincing.

For T. Scarmato's claims in C2 and C3 on April 12, I also can find
nothing convincing.

Doug
Apr 13 2001 16:10:38 Sebastian Hoenig
sfhoenig@aol.com
Possible comet in LASCO C2, 1954 b/w image


Position: Left corner, medium bright, around the position of
SOHO-303, hint of a tail

Positions in the next post

Regards, Sebastian Hoenig
Apr 13 2001 16:13:57 Sebastian Hoenig
sfhoenig@aol.com
DISREGARD LAST MESSAGE!!!!


Combination of noise and 512 ghost objects.

Sorry, and HAPPY EASTER FOR EVERYBODY!!!!!

Regards, Sebastian Hoenig
Apr 14 2001 05:48:15 Scarmato Toni
toniscarmato@libero.it
Dear all,


HAPPY EASTER.

Toni
Apr 14 2001 06:13:37 Scarmato Toni
toniscarmato@libero.it
Suspect comet visible on 4 consecutive C3 images

1024x1024 (0,0) top-left corner.

Positions:

2001/04/13 18:41 (68,314)
2001/04/13 19:42 (69,311)
2001/04/13 20:18 (70,310)
2001/04/13 20:42 (72,308)


Comment: the object is well visible on last two positions
and appear diffuse with a faint central condensation
visible zooming the images.

I am waiting other images to confirm.


Regards,

Toni Scarmato
Apr 14 2001 06:23:19 Scarmato Toni
toniscarmato@libero.it
Sorry!!!

In my last report I gave the positions in mm.

Correct positions in pixels:1024x1024 (0,0) top-left corner


2001/04/13 18:41 (193,890)
2001/04/13 19:42 (197,883)
2001/04/13 20:18 (200,880)
2001/04/13 20:42 (203,874)

At rigth of the pilon, the object travel toward the sun.

Toni
Apr 14 2001 06:49:48 Paolo Laquale
paololaq@tin.it
Happy Easter to all
Apr 14 2001 07:02:19 Sebastian Hoenig
sfhoenig@aol.com
Regarding Toni's report:


Again some variety in the background noise.

Regards, Sebastian
Apr 16 2001 05:49:49 Scarmato Toni
toniscarmato@libero.it
Possible archive sungrazer comet observed at 1999/08/17 on

4 consecutive C2 images 1024x1024 (0,0) top-left corner


Positions:


File Date Time
22050858.FTS 08/17/99 01:31:19 (214,947)
22050859.FTS 08/17/99 01:54:05 (248,912)
22050860.FTS 08/17/99 02:06:06 (294,864)
22050861.FTS 08/17/99 02:30:05 (340,817)FAINT?

THE OBJECT APPEAR DIFFUSE WITH A CENTRAL CONDENSATION.
NO TAIL VISIBLE.

Regards,

Toni Scarmato

Apr 17 2001 07:17:42 Scarmato Toni
toniscarmato@libero.it
Suspect object on 6 consecutive images, moving toward the

sun.

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

2001/04/17 08:18 (132,770)
2001/04/17 08:42 (134,768)
2001/04/17 09:18 (136,766)
2001/04/17 09:42 (138,764)
2001/04/17 10:20 (140,762)
2001/04/17 10:42 (142,759)



Regards,

Toni Scarmato
Apr 17 2001 08:03:34 Scarmato Toni
toniscarmato@libero.it
Dear Doug, dear all, sorry,


regarding my last report the camera is C3.


Toni
Apr 17 2001 08:40:20 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I have examined T. Scarmato's recent claims. I don't believe
any of them to be real objects. In the case of the archive claim
of 99/08/17, there are only 3 obvious points. There is no reason
to believe the object would have faded by the 4th image.

In the case of the 01/04/17 claim, I can see nothing at all in
the images at the locations indicated. That is, there is
nothing above the level of the noise in the images.

Finally, I heard on CNN this morning that various US Gov't.
agencies are monitoring web users using cookies. Apparently,
NASA is one of those agencies. I do not use cookies to try to
track any usage. Thought you'd like to know. Personally, I'm
more than a little offended by this news.

Doug
Apr 17 2001 15:33:19 Scarmato Toni
toniscarmato@libero.it
Posible comet obscured from the pilon on 4 consecutive images

512x512 (0,0) top.left corner


Positions:


2001/04/17 17:18 (146,343)
2001/04/17 17:42 (151,338)
2001/04/17 18:18 (155,333)
2001/04/17 18:42 (159,329)


Seem visible a tail on last two images.

Regards,

Toni Scaramat
Apr 17 2001 16:03:19 Sebastian Hoenig
sfhoenig@aol.com
I could not find any object at the positions posted by Toni

(checked in the images of 18:42 and 19:42 1024x1024).

Regards, Sebastian
Apr 17 2001 16:04:22 Scarmato Toni
toniscarmato@libero.it
Dear Doug,


I Have download the images at 1024 and I continue to see
the object and the possible tail at positions reported.
Sorry!! I forgot. The camera is C3.

Toni
Apr 19 2001 15:34:03 Esko Lyytinen
esko.lyytinen@www.fi

I found a slowly moving object now in the C3 1024 size
animation, in the lower part of the picture about 50 pixels above
the clock numbers. It appears to be the minor planet Juno
at mag 9.5.
Apr 20 2001 08:46:32 Jon Shanklin
j.shanklin@bas.ac.uk
A recent observation puts comet 45P/Honda-Mrkos-Pajdusakova a 

little brighter than expected. It is just possible that it might
have been visible near the threshold on C3 frames between about
March 10 (mag 10) and March 20 (mag 8.5). Jon
Apr 20 2001 10:28:43 Leprette Xavier
xavier.leprette@education.gouv.fr

Possible sungrazer comet in a real-time C2 images now.

It is fairly bright with a short tail and visible in 3 consecutive images on 2001/04/20
from 11:30 to 12:30 UT in bottom left quadrant above the 4 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
Apr 20 2001 10:40:19 Leprette Xavier
xavier.leprette@education.gouv.fr
Possible sungrazer comet in a real-time C2 images 

(More information about the previous message)

Th object is easily visible in 6 consecutive images from 2001/04/20
from 11:30 to 13:32 UT in bottom left quadrant.
It shows a short tail.

I'm waiting to download images to give positions.

Xavier Leprette
Apr 20 2001 10:45:42 Scarmato Toni
toniscarmato@libero.it
Possible comet in C2 with tail at position

512x512 (0,0) top-left corner

2001/04/20 13:42 (129,445)

I am waiting images to confirm


Toni Scarmato
Apr 20 2001 10:50:11 Scarmato Toni
toniscarmato@libero.it
The object is visible also on image 512x512

at position

2001/04/20 12:54 (125,460)


The tail is visible and on thsi image the comet is more brigth.
The object seem foolowed roma another comet at position:

2001/04/20 12:42 (102,472)
2001/04/20 13;42 (114,460)

Other information at next mail


Toni
Apr 20 2001 10:54:04 Leprette Xavier
xavier.leprette@education.gouv.fr

Possible sungrazer comet in a real-time C2 images
(More information about the two previous messages)

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

col, row
11:30 UT 170,979
11:54 UT 186,962
12:06 UT 195,954
12:30 UT 212,937
12:54 UT 229,916
13:32 UT 257,889

A second faint fragment is visible behind the firts object.
Positions soon.

Xavier Leprette
Apr 20 2001 10:54:28 Scarmato Toni
toniscarmato@libero.it
On image 512x512 (0,0) top-left corner

at 2001/04/20 12:30

the first comet is visible at position

(106,468)

and the second at position

(93,481)


Toni
Apr 20 2001 10:57:48 Michael Oates
mike@ph.u-net.com
Another comet follows on from from the bright one just reported.


Can be seen starting in image.
Col Row
20010420_1206_c2.gif 169 45

And in 4 images so far.

Mike Oates
Apr 20 2001 10:59:20 Leprette Xavier
xavier.leprette@education.gouv.fr

Possible sungrazer comet in a real-time C2 images
(More information about the 3 previous messages)

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

col, row
12:06 UT 169,980
12:30 UT 186,961
12:54 UT 203,947
13:32 UT 229,918

Xavier Leprette
Apr 20 2001 11:04:12 Michael Oates
mike@ph.u-net.com
Another comet follows on from from the bright one just reported.


Full positions for second comet
0,0 in 1024x1024 C2 images

Image Col Row
20010420_1206_c2.gif 169 45
20010420_1230_c2.gif 186 62
20010420_1254_c2.gif 203 79
20010420_1332_c2.gif 229 107


Mike Oates
Apr 20 2001 11:05:21 Sebastian Hoenig
sfhoenig@aol.com
Congratulations to Xavier and Toni. Nice comets you've reported.


Regards,

Sebastian
Apr 20 2001 11:05:57 Scarmato Toni
toniscarmato@libero.it
Real-Time comets observed on C2 2001/04/20

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

First comet position

11:30 (85,489)
11:54 (93,481)
12:30 (106,468)
12:54 (114,460)
13:32 (128,445)

second comet positions:

12:30 (93,481)
12:54 (101,472)
13:32 (114,459)


Regards,

Toni Scarmato
Apr 20 2001 11:11:30 Michael Oates
mike@ph.u-net.com
Another 3rd comet to the right of the others

0,0 bottom left in 1024x1024 C2 images

Image Col Row
20010420_0930_c2.gif 415 12

In lots of images
up to
20010420_1206_c2.gif

Mike Oates
Apr 20 2001 11:16:20 Michael Oates
mike@ph.u-net.com
Another 3rd comet to the right of the others

UPDATE
0,0 bottom left in 1024x1024 C2 images

Image Col Row
20010420_0930_c2.gif 415 12
20010420_0954_c2.gif 430 33
20010420_1006_c2.gif 437 43
20010420_1032_c2.gif 453 66
20010420_1054_c2.gif etc
20010420_1106_c2.gif
20010420_1130_c2.gif
20010420_1154_c2.gif
20010420_1206_c2.gif

Mike Oates
Apr 20 2001 11:26:47 Kazimieras Cernis
cernis@itpa.lt
New bright real time sungrazer in C2 right now.

2001 04 20 at 12:30 and later.
Coordinates next message.
Kazimieras Cernis
Apr 20 2001 11:28:17 Sebastian Hoenig
sfhoenig@aol.com
Yeap! I can also confirm Mike O's 3rd fragment. Congrats.


Sebastian
Apr 20 2001 11:35:21 Leprette Xavier
xavier.leprette@education.gouv.fr
Possible new sungrazer comet in a real-time C2 images now.


It is faint and visible in 3 consecutive images on 2001/04/20
from 14:30 to 15:06 UT in bottom left quadrant above the 20 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
Apr 20 2001 11:42:00 Sebastian Hoenig
sfhoenig@aol.com
There are two new objects in the C2 field:


b/w images, 0,0 uppler left

1st:

15:06 109,529
15:30 118,520

2nd:

15:06 95,538
15:30 103,529

Sebastian Hoenig
Apr 20 2001 11:46:41 Leprette Xavier
xavier.leprette@education.gouv.fr
Possible new sungrazer comet in a real-time C2 images 

(More information about the previous message)

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

col, row
14:30 UT 194,987
14:54 UT 211,970
15:06 UT 220,960

The object is faint, round, without tail
It is also visible at 15:30

Xavier Leprette
Apr 20 2001 11:53:02 Sebastian Hoenig
sfhoenig@aol.com
Sorry! The 2nd object seems to be noise regarding the 1024 images.


Sebastian
Apr 20 2001 12:01:18 Scarmato Toni
toniscarmato@libero.it
Also I see the last object reported by Xavier on 

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

2001/04/20 14:30 (97,494)
2001/04/20 14:54 (105,485)
2001/04/20 15:06 (110,480)

But I Have a doubt because there is an object that move
in orizzontal way at positions:

2001/04/20 14:06 (90,494)
2001/04/20 14;30 (97,493)
2001/04/20 14:54 (103,492)
2001/04/20 15:06 (108,491)

This object seem noise and on image at 2001/04/20 14:30
is at the same position of the object moving toward the sun.

Regards,

Toni
Apr 20 2001 12:12:38 Scarmato Toni
toniscarmato@libero.it
The object reported by Xavier continue to be visible at postion:


512x512 (0,0) top-left corner

2001/04/20 15:30 (119,470)

The object moving in orizzontal way is not visible.


Toni
Apr 20 2001 13:20:36 Leprette Xavier
xavier.leprette@education.gouv.fr
Possible new sungrazer comet in a real-time C2 images 


Here is 4 new positions for the object reported today at 11:35:21

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

col, row
14:30 UT 194,987
14:54 UT 211,970
15:06 UT 220,960
15:30 UT 236,941
15:54 UT 255,923
16:06 UT 262,913
16:30 UT 279,894

Xavier Leprette
Apr 20 2001 15:36:33 michael boschat
aa063@chebucto.ns.ca
How many comets are seen?????
4 or 7??? I am lost with the
data reported, Oates, Xavier, Toni
Sebastian,.
I saw one comet at the 1200 UT time but can't
see anything at 1500 UT..

Mike B.
Apr 20 2001 15:44:06 michael boschat
aa063@chebucto.ns.ca
I can verify Xaiver's find at
2001/04/20/1506 UT. It is above the "20"and
fuzzy.

Mike Boschat
Apr 20 2001 17:20:14 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
        A flurry of activity today.  While I'm fairly certain of all 4

claims, you'll have to wait for final confirmation. However, I thought I
should send this out considering this is a 'first' for SOHO. Consider all
of this preliminary information. All comets seen in C2. I have not
checked C3 yet, but due to the pylon in C3, I don't expect to find more
than one of the comets in C3. All dates are 2001/04/20.

Times Discoverer Comment
10:32-14:54 X. Leprette Definite - at least 13 images
11:30-12:54 X. Leprette Probable - trailing the previous comet
09:30-11:30 M. Oates Definite - at least 7 images (maybe in C3)
13:54-15:30 X. Leprette Probable

Preliminary positions given below.

Doug

#COMMENT: COMET - X. Leprette
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
7.66 2001/04/20 10:32:26 142.7 C2 10 131.0 4.0
7.41 2001/04/20 10:54:39 142.8 C2 10 145.0 20.0
7.27 2001/04/20 11:06:27 143.0 C2 10 154.0 28.0
7.00 2001/04/20 11:30:27 143.3 C2 10 170.0 45.0
6.73 2001/04/20 11:54:28 143.6 C2 10 186.0 61.0
6.58 2001/04/20 12:06:27 143.8 C2 10 195.0 70.0
6.30 2001/04/20 12:30:27 144.3 C2 10 212.0 87.0
6.00 2001/04/20 12:54:27 144.6 C2 10 229.0 105.0
5.53 2001/04/20 13:32:04 145.3 C2 10 256.0 134.0
5.25 2001/04/20 13:54:28 145.9 C2 10 273.0 151.0
5.09 2001/04/20 14:06:27 146.1 C2 10 282.0 161.0
4.78 2001/04/20 14:30:27 146.8 C2 10 300.0 180.0
4.45 2001/04/20 14:54:27 147.4 C2 10 318.0 200.0

#COMMENT: COMET? - X. Leprette
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
7.44 2001/04/20 11:30:27 142.7 C2 11 143.0 19.0
7.17 2001/04/20 11:54:28 143.0 C2 10 159.0 35.0
7.01 2001/04/20 12:06:27 143.1 C2 10 168.0 45.0
6.73 2001/04/20 12:30:27 143.5 C2 10 185.0 62.0
6.45 2001/04/20 12:54:27 143.8 C2 10 201.0 79.0

#COMMENT: COMET - M. Oates
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
6.17 2001/04/20 09:30:27 168.8 C2 10 415.0 10.0
5.89 2001/04/20 09:54:28 169.9 C2 10 429.0 32.0
5.75 2001/04/20 10:06:27 170.7 C2 10 437.0 42.0
5.45 2001/04/20 10:32:26 172.1 C2 10 452.0 65.0
5.18 2001/04/20 10:54:39 173.6 C2 10 466.0 86.0
5.06 2001/04/20 11:06:27 174.4 C2 10 473.0 95.0
4.76 2001/04/20 11:30:27 176.3 C2 10 488.0 119.0

#COMMENT: COMET? - X. Leprette
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
7.34 2001/04/20 13:54:28 145.0 C2 11 167.0 11.0
7.21 2001/04/20 14:06:27 145.3 C2 11 176.0 19.0
6.89 2001/04/20 14:30:27 145.5 C2 10 193.0 40.0
6.64 2001/04/20 14:54:27 146.1 C2 10 210.0 54.0
6.49 2001/04/20 15:06:27 146.3 C2 10 218.0 63.0
6.18 2001/04/20 15:30:27 146.6 C2 10 235.0 83.0

Apr 20 2001 23:03:20 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010420_2328 UT


An object on right side of pylon,
parallel to it move towrads Sun.
1/4 way from occultat disk.

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

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


0,460 in lower left corner

LASCO C3 IMAGES

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010421_1942.gif 512 x 512 214, 273 ?
20010420_2328.gif 512 x 512 220, 268
20010421_0055.gif 512 x 512 221, 266
20010421_0138.gif 512 x 512 233, 264

----------------
Michael Boschat
Apr 21 2001 13:20:27 Pavel Shkreby
pavel01@mail.ru
Possible sungrazing comet in a real-time C2 images now.

Visible from 2001/04/21 16:00 UT in 3 consecutive frames.
Telescope - C2
Position in last images
Time X Y
16:00 - 456.985
16:21 - 455.981
16:43 - 454.979
1024x1024 0.0 - upper left corner
----------
Pavel Shkreby
Apr 21 2001 15:52:37 Michael Oates
mike@ph.u-net.com
I tried to send this via the report form this morning, but it 

was not responding after clicking on the submit button. Now it
seems to be working again

Comet reported yesterday is also in C3 images

0,0 in bottom left corner in 1024x1024 images

Image Col Row
20010420_0218_c3.gif 449 359
20010420_0242_c3.gif 451 362
20010420_0318_c3.gif 455 368
20010420_0342_c3.gif 458 371
20010420_0418_c3.gif 462 377
20010420_0442_c3.gif 469 387

Michael Oates
Apr 22 2001 10:21:00 Scarmato Toni
toniscarmato@libero.it
Possible comet visible on 3 consecutive C2 images

512x512 (0,0) top-left corner


Positions:


2001/04/22 13:06 (4,442)
2001/04/22 13:27 (13,425)
2001/04/22 13:49 (25,411)

Te object is well visible at left and move toward the sun.
I am waiting other images to confirm


Toni Scarmato
Apr 22 2001 10:43:50 Scarmato Toni
toniscarmato@libero.it
Regarding my last report, on image at 14:11 I see a point

at position (40,383), but is too faint and I think is noise.

I can't confirm my report.


Toni
Apr 23 2001 04:47:18 Scarmato Toni
toniscarmato@libero.it
Possible comet seem visble on 5 consecutive LASCO C3 images

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

2001/04/23 05:13 (119,368)?
2001/04/23 05:57 (121,366)
2001/04/23 06:40 (123,364)diffuse
2001/04/23 07:24 (125,362)
2001/04/23 08:07 (127,360)


I am waiting other images to confirm.


Toni Scarmat
Apr 23 2001 05:22:57 Scarmato Toni
toniscarmato@libero.it
Dear Doug,


Regarding my last report I Have download the images at 1024
and seem clear that the object is noise.

Sorry!!!


Toni
Apr 23 2001 15:20:17 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Update:

First, I can confirm that all 4 comets reported on Friday have
been confirmed. The 3rd object, reported by M. Oates was seen
in C3 images. Also, the 2nd object was also reported by T.
Scarmato, though with errors in the image times. Upon further
review, I have decided to give both Xavier and Toni credit for
this one.

As far as reports since then. I am unable to confirm the reports
of M. Boschat or P. Shkreby. T. Scarmato has withdrawn his claims
for April 22 and April 23, so I have not reviewed those.

Doug
Apr 24 2001 08:17:31 erwin schwab
e.schwab@gsi.de
object on 3 consecutive images, moving toward the

sun.

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

2001/04/24 09:42 (425,835)
2001/04/24 09:18 (408,874)
2001/04/24 08:42 (373,931)



Regards,

Erwin Schwab
Apr 24 2001 08:27:08 Erwin Schwab
e.schwab@gsi.de

I forget to write that the objekt is on the
LASCO C3 Images
--------------------------------
object on 3 consecutive images, moving toward the
sun.

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

2001/04/24 09:42 (425,835)
2001/04/24 09:18 (408,874)
2001/04/24 08:42 (373,931)
--------------------------------------
Regards Erwin
Apr 24 2001 08:52:20 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
I've checked E. Schwab's report and can't confirm it as a real

object. It appears to be cosmic ray hits. The motion is not
consistent and the object doesn't appear in subsequent frames.
Also, the points are widely separated, which makes correlations
difficult. These are a classic description of false candidates
due to cosmic rays.

Doug
Apr 24 2001 09:11:37 erwin schwab
e.schwab@gsi.de
Hello Doug 


ist the following object due to cosmic rays
as well?
object on 4 consecutive LASCO C3 Images,
moving toward the sun.

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

2001/04/24 11:18 (063,251)
2001/04/24 11:42 (085,255)
2001/04/24 12:18 (148,292)
2001/04/24 12:42 (249,360)

--------------------------------------
Regards Erwin Schwab
Apr 24 2001 10:16:30 erwin schwab
e.schwab@gsi.de
Hello Doug 


i think the object of my last
report is due to cosmic rays,
sorry.
I will go to bed....

Regards

Erwin Schwab
Apr 24 2001 13:46:05 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Yes, the latest report is very definitely just random cosmic rays.
The variation of the reported object is quite dramatic and very
unphysical for a comet.

Doug
Apr 26 2001 10:10:24 Scarmato Toni
toniscarmato@libero.it
Dear Doug, dear all,


I want report this object because is very strange.
Seem a brigth star in the first 3 positions and after seem in agreement with the object of the last position.

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

2001/04/26 04:42 (86,447)
2001/04/26 05:18 (88,446)
2001/04/26 05:42 (90,445)
2001/04/26 12:18 (114,422)


What is it?


Toni
Apr 26 2001 11:01:14 Scarmato Toni
toniscarmato@libero.it
Suspect object visible on 3 consecutive LASCO C3 image moving toward the sun


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


2001/04/26 11:42 (189,342)
2001/04/26 12:18 (191,340)
2001/04/26 12:42 (193,338)

The object is not visible at 10:42.

I am waiting other images to confirm.

PS Regarding my last report the star is appear at 12:42


Regards,

Toni Scarmato
Apr 26 2001 11:10:12 Scarmato Toni
toniscarmato@libero.it
Dear Doug,


I have download the image B/W at 14:42 and the object seem
continue to be visible at approximate position:

512x512 (0,0) top-left corner

2001/04/26 14:42 (200,333)

Seem a brigth comet, no tsil visible.


Toni Scarmato
Apr 26 2001 11:11:24 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010426_1042 UT


I'm doubtful with this one..
I think it is probally "noise"

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
--------------------------------------------
20010426_1042.gif 512 x 512 182, 313
20010426_1142.gif 512 x 512 190, 312
20010426_1218.gif 512 x 512 191, 310
20010426_1242.gif 512 x 512 193, 308

----------------
Michael Boschat
Apr 26 2001 11:23:03 Sebastian Hoenig
sfhoenig@aol.com
I can confirm the object posted by Toni. It is a medium bright

comet(?) with a hint of a tail. Pre-Congrats (until Doug confirms)

It is very wide so might be a twin? Let's wait.

Mike, you posted the same object as Toni.

Regards, Sebastian
Apr 26 2001 11:27:34 Scarmato Toni
toniscarmato@libero.it
Yes! I can confirm my report.


The object is well visible also on color image
20010426_1442_c3.jpg at position reported in my last post.
I think that the comet will be visible on C2.


Toni
Apr 26 2001 11:55:26 Scarmato Toni
toniscarmato@libero.it
Suspect object non sungrazer on 3 consecutive images

LASCO C2 512x512 (0,0) top-left corner at positions:

2001/04/26 14:30 (64,385)
2001/04/26 14:54 (70,386)
2001/04/26 15:06 (73,387)

The object change in brigthness in reliable way.

I am waiting other images to confirm.


Toni Scarmato
Apr 26 2001 14:06:51 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Yes, that's a nice comet, the credit goes to T. Scarmato.  Due to

calibration images being taken, there will be no LASCO images
between 17 and 20 UT. Also, there are lots of earlier images
missing due to a problem with a DSN antenna station. That data
can be recovered.

Unfortunately, for a variety of reasons, nobody else is able to
repoint their instruments. It seems it could look quite nice
in C2. We'll find out. SOHO-309.

Doug
Apr 26 2001 16:31:10 lovejoy terry
tlovejoy@bigpond.net.au
Nice find Toni. I note that the comet may be faintly

visible in images around 20-21hr on April 25th, however,
I dismissed it at the time as noise.

Terry
Apr 26 2001 19:53:03 michael boschat
aa063@chebucto.ns.ca
Fragment following sungrazer in C2 images - 20010426_2330 UT

Coordinates next post.

Michael Boschat
Apr 26 2001 19:53:05 Sebastian Hoenig
sfhoenig@aol.com
SOHO-309 entered C2 FOV at 23:30 UT.


Visible between the 6 of the date at: 227,1002 (1024, 0,0 u.left)

It has still a very wide coma!

Regards, Sebastian
Apr 26 2001 19:56:56 michael boschat
aa063@chebucto.ns.ca
****** 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
--------------------------------------------
20010426_2330.gif 512 x 512 109, 478

Mike Boschat
Apr 26 2001 21:23:22 michael boschat
aa063@chebucto.ns.ca
UPDATE NO Fragment!!!


Disregard last post by me on fragment --
NONE seen.

*** BUT --- on 20010427_0030 and
20010427_0054 UT images
the end part of the tail
seems to "expand" to be wide diffuse?
Is this a real effect or is it because
the comet is in a solar streamer?

Mike Boschat


Apr 26 2001 21:34:54 Sidda Eraiah
Siddalingaiah.Eraiah@oracle.com
Comet entered from bottom right,


C2 27th April 01

Found in

00:30
00:54

The comet is just above 00 of the time.

Thanks,
Sidda
Apr 26 2001 21:38:49 Siddalingaiah Eraiah
Siddalingaiah.Eraiah@oracle.com
The comet I reported earlier is also found on LASCO C2 images 

take on

26 April 2001

23:30
23:54

27th April 2001

00:06
00:30
00:54

I will post the pixel co-ordinates soon.

Thanks,
Sidda.
Apr 26 2001 22:02:04 Siddalingaiah Eraiah
Siddalingaiah.Eraiah@oracle.com
The comet I reported earlier is in the bottom left region (I mentioned bottom right by mistake earlier).


The location of the center is at 301x918 on the C2 image taken
on 27th April 2001 at 01:31.

I could not get the URLs of other images

Thanks,
Sidda
Apr 27 2001 05:17:03 Scarmato Toni
toniscarmato@libero.it
Hi all,


I saw now the comet SOHO 309 in C2.
Good comet, much "resistant", no fragments visibles.

Thanks Terry

Toni


Apr 27 2001 05:25:30 Scarmato Toni
toniscarmato@libero.it
Doug,

excuse me if I post only two positions, but seem a probably
"comet".

Suspect object enter in LASCO C3 at 08:18 at positions:


512x512 (0,0) top-left corner

2001/04/27 08:18 (17,362)
2001/04/27 08:42 (19,360)


I am waiting other images to confirm.


Regards,

Toni Scarmato
Apr 27 2001 05:50:01 Scarmato Toni
toniscarmato@libero.it
Doug,


I have donwload the B/W image at 09:18 and I see a point
that seem in agreement with the positions of my last report

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

2001/04/27 09:18 (22,356)



Toni
Apr 27 2001 07:36:28 Sebastian Hoenig
sfhoenig@aol.com
Regarding Toni's post:


Definitively no cometary object at the posted positions!

Regards, Sebastian
Apr 27 2001 10:12:53 Pavel Shkreby
pavel01@mail.ru
Possible sungrazing comet in a real-time C3 images now.

Visible from 2001/04/27 12:18 UT in 3 consecutive frames.
Telescope - C3
Position in last images
Time X Y
12:18 - 358.693
12:42 - 361.691
13:42 - 365.687
1024x1024 0.0 - upper left corner
----------
Pavel Shkreby
Apr 27 2001 11:11:14 Mimeev Alexander
alexpm@iname.ru
http://sci.esa.int/content/news/index.cfm?aid=1&cid=1&oid=26888

Alexander
Apr 27 2001 13:12:18 Scarmato Toni
toniscarmato@libero.it
Sorry, but due to problems with modem I can't to follow the

situation.

I have checked and I am in agrement with Sebastian regarding
my last report.


I Have observed now another object moving toward the sun
in 4 consecutive LASCO C3 images 512x512 (0,0) top-left
corner at positions:

2001/04/27 14:42 (66,412)
2001/04/27 15:18 (68,410)
2001/04/27 15:42 (70,408)
2001/04/27 16:18 (72,406) brigth

I am not sure because seem that near this object there is a
faint star.

I am waiting other images to confirm.


Regards,

Toni Scamato
Apr 27 2001 13:24:09 Scarmato Toni
toniscarmato@libero.it
Not consider my last report.


SORRY!!! Is a star.


Toni
Apr 28 2001 09:43:09 Scarmato Toni
toniscarmato@libero.it
Suspect object moving toward the sun enter on LASCO C3 

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


Positions:

2001/04/28 12:18 (129,483)
2001/04/28 12:42 (130,480)

I am waiting others images to confirm.


Toni Scarmato
Apr 28 2001 10:27:30 Scarmato Toni
toniscarmato@libero.it
SORRY, the object of my last report is not visible 

at 13:42
Is noise.

Toni
Apr 30 2001 10:45:13 Sebastian Hoenig
sfhoenig@aol.com
Possible comet in LASCO C2 b/w, starting 20010430_0506_c2.gif


Date: Apr 30, 2001

Description:
Moving object in b/w images, diffuse. I extrapolated it into
regular 512 positions by subtracting 50 pixels from y-positions.

Positions: (0,0) upper left, 512 x 512

Time (x,y)

05:06 151,494
05:30 157,486
06:06 167,472
06:30 175,463
06:54 182,456

I missed the image of 05:54.

Sebastian Hoenig
Apr 30 2001 11:10:34 Sebastian Hoenig
sfhoenig@aol.com
Possible comet in LASCO C2 b/w, starting 20010430_0506_c2.gif

(Update of the last report)

As the last time I posted something in the b/w images I made an
animation an posted it on my webpage so you can look what I
suggest to be a comet and possible may send me some comment:

http://members.aol.com/sfhoenig/apr30.html

Regards, Sebastian
Apr 30 2001 11:20:57 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
I can confirm the object reported by S. Hoenig as indeed a real

comet, apparently a Kreutz sungrazer. It's visible in 8 frames,
yeah for high cadence, beginning at 0430 UT on April 30. That's
in the C2 telescope. I haven't checked C3 yet. Rough positions
below.

Also, note, there may be a loss in network connection for a couple
of hours starting sometime soon. Can't be helped. So, you will
lose ability to post to the web page temporarily. Also, e-mail
to me will not get through, so just be patient. Thanks.

Doug

#COMMENT: COMET SOHO-310
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
6.71 2001/04/30 04:30:05 155.0 C2 10 281.0 8.0
6.47 2001/04/30 04:54:05 155.7 C2 10 296.0 24.0
6.33 2001/04/30 05:06:05 155.9 C2 10 302.0 34.0
6.08 2001/04/30 05:30:06 156.5 C2 10 315.0 51.0
5.82 2001/04/30 05:54:05 157.3 C2 10 330.0 68.0
5.68 2001/04/30 06:06:05 157.5 C2 10 336.0 78.0
5.43 2001/04/30 06:30:05 158.3 C2 10 350.0 95.0
5.14 2001/04/30 06:54:16 159.2 C2 10 365.0 115.0