SOHO-LASCO Comet Reports for 200105

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

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

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

Sorry.



I sent the second report to correct my comment.

The object is at "rigth" of the pilon.



Toni

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

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

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

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

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

Happy May Day comrade

comet hunters!



||

@@

<

U



Mike B.

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

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

SORRY for my error and many thanks for your explanation !!!



Regards Paolo Laquale

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

Regarding my last report, the object is not visible on image

at 15:42.





Regards,



Toni

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

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

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

Sorry Miroslaw but the object you reported is actually a star.



Terry Lovejoy

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 

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

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 

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

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

New sungrazer in C2: 

0,0 upper left 1024x1024



DATE          TIME     TEL      COL    ROW

2001/05/05   10:35     C2       384    937



Kazimieras

Real time comet in C2 images of 2001/05/05 starting from 08:30. Details in the next post.



Maik

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  

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

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

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.

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

Not consider my last report.

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





Toni

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

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

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

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

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

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

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.

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

DISREGARD My LAST POST of C2

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



Mike B.

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

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

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

Regarding my last report the object is visible on image

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

Probably noise.  







Toni

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.

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

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

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

I can confirm Xaviers comet find.

MB

About my previous message :

I'm sorry, the positions are measured from the top-left corner

of a 512x512 frames



Xavier

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

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

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

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

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

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

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

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

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.

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

CORRECTION!!! DATE SHOULD READ 13th  -- NOT 12th!!!!

images are coming in late!

Mike Boschat

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 

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

Regarding Toni's post:



No object visible in the following images.



Regards, Sebastian

OFF TOPIC --- the bright

object starting to enter the C3 field at

mid left is Saturn.

Mike B.

Possible comet or stary light?lasco c3 gif 900kb.386,270

5/15/01 18:42.thank you for your time.

Mike R,



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

is ;-)



Sebastian

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

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

SORRY!

Not consider my last report.  The object is not visible 

at 06:18. 



Toni

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

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

Dear Doug,



regarding my last report, probably noise.



Regards,



Toni Scarmato 

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

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

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

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

Hmmm/...3 images in C2 to say
comet. But only 2 xy's given...guess
rules to follow don't apply to all.

I can confirm M. Oates C2 discovery.



It is also obvious enough to warrant announcement

from 3 positions.

 

Terry Lovejoy

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.

Last post should read C2 NOT C3..

Mike B.

OFF TOPIC -- Internet problem!

Anyone trying to reach me at xxx@xxx in advance

Mike B.

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

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

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

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

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

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

Not consider my last report, the object is not visible

on image at 09:18







Toni

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

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

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

Yes, I can confirm. I was only 2 minutes too lat :(



Sebastian

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

Congratulations Doug, I was too late!



Xavier 

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

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

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

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.

Correction to my post -- object is to RIGHT of pylon!
Agh!

Mike B

I am unable to confirm M. Boschat's claim of a C3 object on May 22.



Doug

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

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

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

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

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

Comet in C2 now 0926 UT
coordinates to follow

Mike B

FORGET IT!!!!!!!!!
OATES FOUND IT AS USUAL!

MB

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

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

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

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

The object is visbile on image C2 B/W at positions:





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





Regards,



Toni

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

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

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

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

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

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

Excuse me, the image is in LASCO C2 (512x512)



Paolo

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

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.

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

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

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

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

Dear Doug,



regarding my last report the object not seem visible on images at

15:25 and 15:52. Probably noise.





Toni

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.

Possible sungrazer in C2 images - 20010524_2350 UT



Coordinates next post.



Michael Boschat

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

Sungrazer 2350...0128

Mimeev

Comet Boschat(1024x1024):



2350 592  7

0006 595  18

0026 600  31

0052 606  49

0128 613  73

Mimeev

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.

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.

Hi all,



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

of interest.



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



Doug

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

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

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 

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

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

Dear all,

thank you Paolo, now I know! Excuse for my last report! 

Good holiday Doug

Peretto Ivo

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

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

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

SORRY!



Regarding my last report only noise.







Toni

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.

Poss. comet 20010527 C2 Top/left 512*512



1026 4  103

1106 28 106

1126 40 108



Alexander

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

Possible comet C2 near LASCO logo 20010527_1626 UT
Coordinates next post
Mike B.

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

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

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

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

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

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

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!

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

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

Alexander,



look at the reports below.



Sebastian

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

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

Yes Sebastian. Thanks.



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



It is a Kreutz comet?





Toni

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

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

DISREGARD LAST POST - NOISE



Mike B.

SORRY! The object in C3 regarding my last report is noise.



Toni

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

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

For confirmation we need time of images and LASCO camera.



Sebastian

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

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

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

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

Possible sungrazer in C2 images - 20010601_0054 UT



Coordinates next post. 



Michael Boschat

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