SOHO-LASCO Comet Reports for 200208

Off Topic - sorta of:



 Note a fuzzy object in the C3 images

at lower left near 7pm postion, that

is M67 in Cancer, M44 ( Beehive ) is

just clearing the top of the occultating

disk. M67 could be mistaken for a comet.



Mike B 

Hello, I cannot confirm any comets.



Rob: Looks like noise.



John: That is Vesta. Check "C3 Transits" for expected planets,

asteroids, and bright stars expected in the field of view.

Typically, if you see an object moving almost exactly horizontal, 

you can be fairly certain that it is either a star, planet, or

asteroid. Check an ephemeris program to see if a known object

is expected at your positions. And last, when submitting comet

positions please reference consecutive images. Hope this helps.



Derek

There seems to be a comet leading and on

approximately the same track as C/2000 WM1 Linear

in SWAN images 2002 Mar 03 - 31.

I think that it is real but could not identify it.



rough positions

Date lambda beta alpha delta

2002 Mar 12  283  +23  19    0

2002 Mar 19  284  +30  19  + 7

2002 Mar 31  292  +43  19  +21



 Rainer

>in SWAN images 2002 Mar 03 - 31.

this should read: Mar 12 -31



 Rainer

Rainer,



already found on July 25 and 27 by M. Suzuki. Announced in IAUC

7944 yesterday evening as 2002 O6. 9.5 mag visually confirmed by 

A. Hale. Prediscovery image date back to July 13.



Regards, Maik

Rainer,



sorry, I did not read carefully. You speak obviously of another 

object.



Regards, Maik

Rainer,



your object could not be C/2002 C1 (Ikeya-Zhang) ?



Maik

Rainer,



I now see that it is not 2002 C1 which is in fact moving on the other side of the sun. I see your indicated object but I am unable to identify it. Sorry for the message flood.



Maik

Hi all,



I just inserted Rainer's coordinates into the MPChecker and found

thjet it is C/2002 E2 (Snyder-Murakami).



Regards, Sebastian

Thanks, Sebastian.

I have used the wrong MPChecker



This one finds C/2000 WM1 but not C/2002 E2

http://cfaps8.harvard.edu/~cgi/CheckSN.COM



This one finds both comets

http://scully.harvard.edu/~cgi/MPCheck.COM



 Rainer

another SWAN comet?

it looks real, but I can't identify it

date lambda(deg) beta(deg) alpha(hhmm) delta(deg)

20020309  354  -10   2354 -12

20020312  356  -10   0001 -11

20020314  357  -10   0005 -10

20020316  358  -10   0009 -10

20020319  359  -10   0012 -10



it brightens considerably

but there also seems to be some noise

in the next images

a good one is

20020326  002  -10   0023 -08



I could not use the MPChecker

but GUIDE shows nothing there

it is close to the Sun



 Rainer

________________________________________________________________



ANNOUNCEMENT:





I do hope Doug and Derek will forgive me for placing a link on

this page. It is to my new website (Dave's Virtual Sungrazer

Observatory) which has been constructed as an observational tool

that can provide the user with all the necessary information

needed for making an online SOHO comet discovery.



The site has been designed to enable rapid access of information

and fast response after detection; included also are 'real-time'

lists of C2 and C3 images which can be continually updated,

monitored or downloaded, at your fingertips. In addition, Swan

comet-tracker's maps are also available!



For use, a resolution of 1280x1024 is highly recommended. This

allows the information to be presented in an uncluttered way on

17" or 19" monitors; 1024x768 also seems to work adequately on

smaller screens.



Anyone interested, please point their browser to -



http://www.dvso.pwp.blueyonder.co.uk 



As the site is in its initial stages of development, I would

be delighted to receive any emails from visitors with regard to

suggestions, inclusions and improvements. These comments should

be directed to -



xxx@xxx



Once again, I hope you may find it useful and thank you for your

interest...



- Dave



________________________________________________________________





 

2002 May 25 - Archive comet found in C2 imagery beginning at

15:06 visible in 8 consecutive frames.  (This is about 5 hours

after SOHO 450).  1024x1024 coordinates measured from lower

left corner:



YYYY-MM-DD HH:MM  FITS File    Col Row

---------------- ------------  --- ---

2002-05-25 15:06 22119732.fts  564   6

           15:26 22119733.fts  569  19

           15:50 22119734.fts  574  34

           16:06 22119735.fts  579  45

           16:26 22119736.fts  583  59

           16:50 22119737.fts  588  76

           17:06 22119738.fts  592  87

           17:26 22119739.fts  598 101



--Rob

2002 May 25/26 - Another archive comet found in C2 imagery beginning

at 23:26 visible in 8 consecutive frames.  This one was a tough find.

1024x1024 coordinates measured from lower left corner:



YYYY-MM-DD HH:MM  FITS File    Col Row

---------------- ------------  --- ---

2002-05-25 23:26 22119758.fts  600  25

           23:50 22119759.fts  606  40

2002-05-26 00:06 22119760.fts  608  50.5

           00:26 22119761.fts  611  64

           00:50 22119762.fts  617  77

           01:27 22119763.fts  625 103

           01:50 22119764.fts  631 119

           02:06 22119765.fts  633 129



--Rob

Rainer,



for the last position using the MPChecker I find 9P/d'Arrest as 

a likely candidate.

Btw, congrats, Rob, if confirmed!



Regards, Maik

Rainer,



I have identified your object.



It is C/2002 G3 (SOHO) - the non-Kreutz discovered by Xing-Ming.



Regards, Maik

Possible comet in C3 images - 20020803_1618 UT





 ****** 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       

--------------------------------------------

20020803_1518.gif  512 x 512    373, 308      

20020803_1618.gif  512 x 512    371, 306

20020803_1718.gif  512 x 512    371, 304

20020803_1818.gif  512 x 512    370, 301 

      

----------------

Michael Boschat

Possible faint Kreutz in C2 images of 2002/06/25 fading fast



1024 x 1024    

0,0 Top Left



15:54   890,  1008

16:06   888,   996

16:30   886,   972

16:54   884,   949

17:06   882,   937



- Dave

Kreutz in archive C2 images of 2002/05/25.



No reference found to it in either the Archive Reports or

previous Discovery Lists...



Visible in 7 images.    1024 x 1024     0,0 Top Left



2002/05/25     



23:26   600,   998

23:50   606,   984



2002/05/26



00:06   608,   973

00:50   618,   945

01:27   625,   921

01:50   631,   904

02:06   634,   895



- Dave

Dave,



just scroll down a bit. Rob reported this on Aug 02 2002 22:00:41



Maik

Kreutz in archive C2 2002/05/30



I cannot find a reference to it in any previous posts or

discovery lists.



This faint one is visible in 8 images. 1024 x 1024. 0,0 Top Left.



2002/05/30



23:26   655,  1016

23:50   659,   998



2002/05/31



00:06   661,   988

00:26   663,   976

00:50   666,   959

01:27   672,   934

01:50   675,   918

02:06   678,   906



- Dave

Re claim of Aug 04 2002 15:29:02



Congrats to Rob :o)   ....Thanks for being so quick Maik.



I wonder if my Aug 04 2002 16:16:38 has also been recently claimed as well.  Just checking now....



- Dave

Re claim of Aug 04 2002 15:29:02



Congrats to Rob :o)   ....Thanks for being so quick Maik.



I wonder if my Aug 04 2002 16:16:38 has also been recently claimed as well.  Just checking now....



- Dave

Re claim of Aug 04 2002 15:29:02



Congrats to Rob :o)   ....Thanks for being so quick Maik.



I wonder if my Aug 04 2002 16:16:38 has also been recently claimed as well.  Just checking now....



- Dave

The official tally is now 496 SOHO comets. I confirmed the 

following reports...



 #    Reported By    Dates     Camera

------------------------------------

494   R. Matson     02/05/25     C2

495   R. Matson     02/05/25-26  C2

496   D. Evans      02/05/30-31  C2





We could hit 500 by the end of the week.  Unbelievable.





Derek

and C/2002 O6 doesn't count?



 Rainer

You are absolutely correct. I completely forgot to include the

SWAN comet (IAUC 7944) from last week.  This comet was reported

to the IAU by M. Suzuki and designated 2002 O6. This is the 3rd

SWAN discovery.



We will simply append the SWAN comet to the end of our list,

calling it SOHO497. If a SWAN report were to determine number

500, we would be more careful in determining its SOHO number.



Thank you Tony H. and Rainer.



Derek

Possible comet in C3 images - 20020806_1518 UT





 ****** 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       

--------------------------------------------

20020806_1518.gif  512 x 512    353, 289     

20020806_1618.gif  512 x 512    348, 284   

20020806_1718.gif  512 x 512    346, 281

     

----------------

Michael Boschat

Comet in C2 ?



This is the first time for me ,so i'm sorry if I make some mistakes .

I'm not sure of the trajectory of the object (comet?) because he pass behind the sun.



Start 0,0 top ,left

Jun 19 2002

Files	             Size      Position :x , y

--------------------------------------------------

20020619_1254.gif   512x512       214 , 360

20020619_1331.gif   512x512       210 , 345

20020619_1354.gif   512x512       206 , 336

		********

20020619_2330.gif   512x512       205 , 185

20020619_2354.gif   512x512       194 , 177

20020620_0006.gif   512x512       187 , 170



Does anyone can confirm ? Thank you , Maxime Spano .

Kreutz in archive C2 of 2002/06/14



A faint one, but can be tracked in 8 images.



1024 x 1024. 0,0 Top Left.



2002/06/14



18:55   882,  945

19:06   880,  937

19:30   878,  922

19:54   876,  907

20:06   875,  900

20:30   871,  884

21:08   866,  860

21:30   861,  846



- Dave





 

Hi Dave,



That is the same object I reported on 14-JUN-2002.

Derek thought it was noise--but of course I'm happy

if Doug/Derek want to take another look:)



Best Regards and Happy Hunting!



--DJ Hanson

Well done DJ... 



Just read your finders report for that one. I believe its real. The positions and movement seems right but I guess Doug and

Derek have the last word... 



Good hunting for the 500th



- Dave

Okay, I have looked at the recent claims.



Mike: I see nothing cometary at your positions.



Maxime: You are reporting random cosmic rays. Since you are new, 

may I suggest reading my post of May 30 2002 2:01:27 that can be

found in the archive pages. It gives advice to beginners. Overall,

the best way to familiarize yourself with finding SOHO comets is

to look at past finds. Start with the big brilliant claims 

(e.g. SOHO465 visible 02/06/17-18 in C2 & C3) and then work 

towards the more faint comets. Observe their velocity, appearance,

and where/when they typically appear.



DJ/Dave: Just 1-1/2 months ago Doug and I both agreed that this

claim did not show convincing evidence that it is a comet. But

just to make sure, I had another look using several different

processing methods and they all point to the same thing. This is

simply not a convincing argument. In fact, you should notice that

from 19:06-19:54 you disagree as to which object is the comet.

At the general location of your positions for these three images

there is always 2-3 other smudges that could correspond to the

"comet". This tells us that you are looking too deep into the 

background for a point that can line up well with your other

positions. I think you have run into the dangerous game of not

reporting objects that resemble comets, but rather reporting

background-level points that are in the general location of the

Kreutz group. Basically, it has been reduced to a game of 

connect-the-dots. At least from 20:06-21:30 you agree on the same

location. However, there is nothing consistent about these points

regarding their brightness and appearance, especially the first &

last position with regard to the middle two. And again, these 

points are very dim and display no cometary appearance.  Also, the

"comet" is missing in several previous images and I see nothing at

18:55. I could very easily find noise at this brightness level and

inconsistency that line up on a Kreutz path. Therefore, we

concluded that these points have not displayed enough evidence to

make us 99% sure that we're looking at a comet, which is the level

of confidence needed when there is no means of confirming the

object outside of LASCO. Please email me if you have any other

questions or concerns regarding this claim.  





By the way, I have updated the link displaying past LASCO comets.

Please do not hesitate to email me with anything you believe is

incorrect. I have no doubts that at least 1 typo exists after

entering that much info.





Derek

Object comet (?) in C3 images - 20020809_0818 UT



 To left of pylon near 8pm position

by 2 stars.



 ****** 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       

--------------------------------------------

20020809_0818.gif  512 x 512    43, 373      

20020809_0918.gif  512 x 512    45, 371

20020809_1020.gif  512 x 512    46, 369

20020809_1118.gif  512 x 512    49, 366 

      

----------------

Michael Boschat

Meyer group comet in archival C2 images of 2002 Apr 20.



C2, 1024x1024, 0,0 upper left



22117307.fts  19:27   36, 348

22117308.fts  19:50   43, 321

22117309.fts  20:06   48, 303

22117310.fts  20:26   53, 282

22117311.fts  20:50   61, 255

22117317.fts  21:26   75, 217

22117318.fts  21:50   85, 192

22117319.fts  22:06   92, 176

22117320.fts  22:26  101, 156



small comet



  Rainer

Disregard my Aug 09 2002 08:00:18

post



MB

Hello, 



I can confirm Rainer's most recent claim. The total is now 498 

SOHO comets.



Derek

possible comet in C3 images

b/w 512*512 from the LASCO website

enlarged to 1024*1024

0,0 in upper left corner



Date     Time  x   y

20020810 1618 764 636

20020810 1718 756 630

20020810 1818 746 624



 Rainer

Confirmation of Rainer's find. It looks good to me.



Regards, Sebastian

Yes, it's certainly real.

Well visible in 1024*1024

also b/w 512*512 from the LASCO website

enlarged to 1024*1024

0,0 in upper left corner



Date     Time  x   y

20020810 2018 730 610



brightening, could (hopefully) enter C2

around 04:18 UTC (Aug 11)

C2 sequence is 03:30, 04:06, 04:30, 05:30.



 Rainer

Nice find, Rainer!  It's brightening nicely.  It's actually

been visible since the 10:23 frame.  Here are the approximate

C3 1024x1024 coords (0,0 in upper left):



10:23 808, 673

11:18 801, 667

12:18 795, 662

16:18 764, 637

17:18 756, 631

18:18 747, 624

20:18 729, 610



Should be #499.  Just one more to go!  --Rob

Possible Kreutz in archive C2 of 2002/05/25



small, faint...  chance alignment of noise?   



5 images   1024 x 1024   0,0 Top Left



16:26    583,  964

16:50    589,  947

17:06    592,  936

17:26    597,  922

17:50    602,  904?



- Dave

Update:



Re: previous post - Possible Kreutz in archive C2 of 2002/05/25



Another position available...



15:26    569, 1003



- Dave

 

Sorry Dave, it's SOHO-494 found by Dave (see below).



Regards, Sebastian

CORRECTION:



Sorry Dave, it's SOHO-494 found by ROB (see below).



Regards, Sebastian

Trying Again :o)



Possible small, faint Kreutz in C2 2002/05/26



1024 X 1024   0,0 Top Left



17:26    625,  927

17:50    630,  910

18:06    634,  898

18:26    638,  883



This object doesn't appear to be listed in the discovery reports

for May, but I wonder if it may have been found recently.



- Dave

UPDATE to previous post -



Possible small, faint Kreutz in C2 2002/05/26



More positions now available...



1024 X 1024.   0,0 Top Left.   8 images.



16:26    613,  968

16:50    618,  952

17:06    621,  940

17:26    625,  927

17:50    630,  910

18:06    634,  898

18:26    638,  883

18:50    641,  859



I wonder if this will be the 500th SOHO! Perhaps someone knows

of a previous report concerning this object?



- Dave

 

Dave,

there is no confirmed object at these positions.



 Rainer

UPDATE to previous post -



Possible small, faint Kreutz in C2 2002/05/26



To assist its location and confirmation, area measurements

(number of pixels allocated to the object in each frame) are now

available and shown in brackets... From 17:26 - 18:26 the object

can be followed quite easily on a 19" screen.



1024 X 1024.   0,0 Top Left.   8 images.



16:26    613,  968  (4)

16:50    618,  952  (4)

17:06    621,  940  (6) Maximum Magnitude

17:26    625,  927  (5)

17:50    630,  910  (4)

18:06    634,  898  (4)

18:26    638,  883  (4)

18:50    641,  859  (4)



Seeking confirmation...



- Dave

SORRY. A CORRECTION TO THE PREVIOUS POST ! 

Area figures were assigned to the wrong times -



Possible small, faint Kreutz in C2 2002/05/26



To assist its location and confirmation, area measurements

(number of pixels allocated to the object in each frame) are now

available and shown in brackets... From 17:26 - 18:26 the object

can be followed quite easily on a 19" screen.



1024 X 1024.   0,0 Top Left.   8 images.



16:26    613,  968  (4)

16:50    618,  952  (4)

17:06    621,  940  (4)

17:26    625,  927  (6) Maximum Magnitude

17:50    630,  910  (5)

18:06    634,  898  (4)

18:26    638,  883  (4)

18:50    641,  859  (4)



All correct now. Seeking confirmation on the above report...



- Dave

possible Meyer group comet in C2 images

b/w 512*512 from the LASCO website

enlarged to 1024*1024

0,0 in upper left corner



Date     Time  x   y

20020812 1206 1000 234

20020812 1313 928 168

20020812 1355 880 128

20020812 1406 868 120



 Rainer

I can confirm Rainer's Meyer group comet!!! This would be the first

Meyer group comet after their discovery as a group found in real-time 

images.



Maybe this or Dave's claim is the 500th. It would be a nice surprise

if the 500th is a Meyer group comet!



Regards, Maik

UPDATE Meyer group comet in C2 images

0,0 in upper left corner



Date     Time  x   y

20020812 1206 1000 234

20020812 1230  975 210

20020812 1313  928 168

20020812 1355  880 128 enlarged from 512*512

20020812 1406  868 120 enlarged from 512*512

20020812 1430  840  98 enlarged from 512*512



 Rainer

Hello,



Possible comet in Lasco C2 images of this morning ?

0 ,0 in top left corner



   Files           Size      Pos :X , Y

-----------------------------------------

20020813_0754.gif  1024x1024     271 ,949

20020813_0806.gif  1024x1024     285 ,963

20020813_0830.gif  1024x1024     314 ,985



Not found before, waiting for download image of 8:54 .

Maxime.

Possible comet in Lasco C2 images of this evening



0 ,0 in top left corner

Files               size     Pos : x, y

-------------------------------------------

20020813_1430.gif   1024x1024     151 ,422

20020813_1454.gif   1024x1024     125 ,437

20020813_1506.gif   1024x1024     102 ,449

20020813_1530.gif   1024x1024      91 ,457



Strange trajectory ,but I hope ...

Maxime.

Maxime,



for both of your claims: Just calculate the speed in x and y in

pixels per hour between the images. You'll see that it changes 

drastically in all cases. So, without even looking at the images

- this is noise. Real objects move almost constant in x and y in 

successive images.



Hope this helps, Maik

Kracht group comet in archival C2 images of 2002 Jul 12.



C2, 1024x1024, 0,0 upper left



22123420.fts  02:30  212, 350

22123425.fts  03:06  169, 351

22123426.fts  03:30  141, 351

22123431.fts  04:06   99, 351

22123432.fts  04:30   72, 351

22123437.fts  05:06   31, 352

22123438.fts  05:30    5, 353



small comet



   Rainer

UPDATE Kracht group comet in archival C2 images of 2002 Jul 12.

I think that I have found faint images of this comet

in images of July 11 also:



C2, 1024x1024, 0,0 upper left



22123365.fts  16:06  970, 390

22123366.fts  16:30  943, 387

22123371.fts  17:06  901, 383



22123420.fts  02:30  212, 350

22123425.fts  03:06  169, 351

22123426.fts  03:30  141, 351

22123431.fts  04:06   99, 351

22123432.fts  04:30   72, 351

22123437.fts  05:06   31, 352

22123438.fts  05:30    5, 353



small comet



   Rainer

Confirmation of Rainers possible Kracht group comet.

Well done that's a quite a faint one.



Regards,



Michael Oates

Possible comet in C3 images - 20020814_0018 UT



 ****** 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       

--------------------------------------------

20020814_0018.gif  512 x 512     356, 324      

20020814_0042.gif  512 x 512     354, 319

20020814_0142.gif  512 x 512     353, 318

20020814_0218.gif  512 x 512     352, 315

      

----------------

Michael Boschat

Congratulations to Rainer Kracht!



His discovery of the first Meyer group comet found in real-time images has been officially confirmed as Comet 2002 P3 (SOHO-500).



Movies and images can be found at:

http://sohowww.nascom.nasa.gov/pickoftheweek/

So, the word is out.  We're up to SOHO-500.  This post is only

for reports made through the end of August 12, 2002.



We have confirmed only 2 additional comets, with a third comet

being added to our infamous X/ list.



The two confirmed finds are given below:



SOHO #   Date      Tel.  Discoverer  Group

--------------------------------------------

 499  02/08/10-11   C3    R. Kracht (Kreutz)

 500  02/08/12      C2    R. Kracht (Meyer)



The winner of the SOHO-500 contest is Diane McElhiney and the

runner-up is William Trost.



The X/ comet is the archive report by D. Evans for a C2 comet

on 2002/05/26.  For those who don't know, we keep a list of X/

comets which are reports we don't feel confident enough to confirm

reliably, but which have some compelling reason for us to keep

track of.  In the future, if we change our criteria or someone

comes up with a better idea, we can go back and review these claims.



Doug

Does anyone know the identity of the bright object in the current SWAN images? Its at about 245 degrees Gamma and +10degrees Beta or x,y 220,280 referenced from the top left hand corner.  It seems to be stationary in the sky and I wonder if it is actually Comet Ikeya-Z.



Terry Lovejoy

Congrats to Rainer on his SOHO500 discovery!!!

It was indeed an excellent race...





Doug, 



I do hope my SOHO500 claim (made 27 hours prior

to Rainer's claim) wasn't made an X-Comet simply

because Rainer's was more photogenic and newsworthy;

and would undoubtedly make 'a better press release' for

SOHO and NASA. I would dread to think the course of

truth, honesty and justice may have been perverted with

SOHO500 becoming nothing more than a hand-picked comet

which favoured a bright 'Meyer' over a 'boring' Kreutz. 

I guess fellow comet hunters will have to weigh up the

evidence and even look at the images to perhaps decide 

for themselves which is, or is not, the true SOHO500...

Of course, SOHO and NASA have the final say in these

matters... And I am sure honesty prevails throughout

the whole scientific community.



;o)



Best of luck everyone with SOHO600!!!  And my deepest

admiration to Rainer! He certainly has the dedication

and the skill it takes - and I am truely amazed by how

he does it! Perhaps one day he will give us his secret.

...Well I must rush, I'm off to find another very faint

and boring comet - no doubts Kreutz, LOL!



:o)



- Dave





 

Possible Kracht Group comet in archival C2:



21-Jul-2002, 1024x1024, (x=0,y=0) upper-left

           

21122362.fts 18:30 - (221,369)

21122367.fts 19:31 - (151,371)

21122372.fts 20:06 - (115,373)

21122373.fts 20:30 - (86 ,374)

21122379.fts 21:30 - (25 ,376)



small, diffuse



--DJ Hanson

Possible comet in Lasco C2 images



Date: August 15, 2002



Positions (1024x1024); (0,0) lower left



Time     (x,y)

      121 481  20020815 1254  4006854   3354411

   1  121 483  20020815 1254  4006854   3353346

   2  166 476  20020815 1254  4006854   2970529

   3  140 597  20020815 1254  4006854   3278926

   4  139 596  20020815 1254  4006854   3285254

   5  145 596  20020815 1331  4006891   3234978

   6  151 597  20020815 1354  4006914   3186865

   7  154 597  20020815 1406  4006926   3161787

   8  159 597  20020815 1430  4006950   3120019

   9  163 597  20020815 1454  4006974   3086632

 



David Hughes

Possible comet in Lasco C3 images of 15-Aug-02



Connecting all images makes for a nearly perfect elliptical

pattern around the sun as it hits its perihelion near timecode

9:18.



Positions (1024x1024); (0,0) upper left



Time     (x,y)

5:42      756,212

6:18      599,239

6:42      494,258

7:42      324,296

8:42      157,324

9:18      112,350

9:42      130,411

11:42     433,625

12:18     564,705

13:42     884,877



Tallon     ("Newbie")

Found something large in left hand bottom corner in images 

20:30, 20:06, 19:54 & 19:31 etc.

Look above the date mark, above the "02" in 2002



See small animation at 

http://www.angelsflowers.com/august15.gif

Found something in the C2 images...



Right hand side of the 13:31 image about half way up from the bottom.  A faint white dot with a very long faint tail.



This one may have already been reported....



I will search for the co ordinates now!



Martin Chuter

Metcheck Astronomer



http://www.metcheck.com/astronomy.asp

Possible comet in LASCO C2 images



Date: Aug 14, 2002



Brief description:

Clearly visible comet, moderately condensed, no

tail visible



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



Time    (x,y)



00:06	126,468

00:30   131,468

00:54   136,468

01:31   143,468

01:54	148,468

02:06	152,468

02:30	155,467

02:54	161,467

03:06	162,467



Regards,



George Anthony Lopez

Possible comet in LASCO C2 images



Date: Aug 14, 2001



Brief description:

Faint comet, no tail visible



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



Time    (x,y)



00:06   692,185

00:30   697,185

00:54   702,185

01:31   709,185



Regards,



George Anthony Lopez

This post is only to cover some of the recent claims.  Not all of

them.  These are all posts from 'newbies' who are making very

common mistakes.  That is, your seeing stars or cosmic rays.



First the stars.  George Lopez, Trent Peters and David Hughes

have all reported stars.  There are lots of them in every image.

The easiest way to identify them is to note that there are

other objects also moving at hte same speed in the same direction.



Now the cosmic rays.  Tallon Atkinson, you've picked out a nice

assortment of them.  These are high energy protons which strike

the CCD detector.  There are lots of them in every image.  They

appear randomly.  That's how we can eliminate them.  Note, your

object changes shape from image to image.  Also, there are some

images you left out.  There's nothing at the 'expected' positions

in those images.  I didn't even bother to check to see if the

changes in direction and velocity were all smooth, which is what

one would expect from a real object like a comet.



Please take your time to really gain experience looking at the data.

You won't find a comet the first time you look at the data.  You

probably won't find one the first 10 times.  It might take weeks.

Be patient.



Thank you.

Doug

Thanks, Doug, for the input.  I realized some of my mistakes the first time around as I was researching more screens.  On this one, I fully plotted and it made a perfect fit, with all the images - and all images seemed to retain the same shape throughout and 'moved' at right time spacing distance.  Thanks for your patience, and I'll try not to post cosmic rays (although this one may be as well...).



Possible Lasco C3 on 16-Aug-02 (0,0) upper left 1024x1024



4:18	638	425

4:42	564	375

5:18	408	303

5:42	319	280

6:18	195	263



Tallon

Tallon,

For your latest claim, the positions are far too spread apart;

 a C3 comet would not be moving nearly that fast. There are also substantial changes in velocity, which you would not see

 in a true comet; try measuring the change in pixels per minute from one frame to the next and you should see what I mean. 

Take a look at SOHO-499, Rainer Kracht's comet of August 10--

it should give you a good idea of how a typical C3 comet 

will move (and look).



Tony Hoffman

A quick note.  On Tuesday, Aug 21, the LASCO doors will be closed

for a few hours (from about 10:00-21:00 UT).  SOHO will be doing

off-point maneuvers.  They are small offpoints, but always risky.

Obviously, there will be no LASCO data between those times.  Watch

EIT to see the actual spacecraft moves.



Doug

Oops.  Make that, Tuesday Aug 20 the LASCO doors will be closed

from 10:00 UT to 21:00 UT.



Doug

Hello,

we can confirm one comet from all of the recent posts, so we are

now current with checking claims. The confirmed report, SOHO-501,

is Rainer's July 11-12, 2002 Kracht group claim.  At first I was

skeptical about the positions on the solar west-limb side, but

after reviewing the color sequence images and confirming the comet

, I accepted a bunch more of them. Rough positions to follow.



DJ, I thought your first 2 positions were not believable

especially with a CME erupting in the heart of these positions.

The last three positions did not seem to move with consistent

velocity (I believe the 20:30 position should have been x=82) and

the velocity is not what we expect for Kracht group comets at

this time of year. Also, the appearance changes quite dramatically

in the 20:06-20:30 images with respect to the rest. Email me with

any concerns about this claim. 



Tallon, the comets we see in C3 at this time of year typically 

move with a speed of: vel(x) ~ 12 pixels/hour  &  

vel(y) ~6 pixels/hour. Your positions indicate speeds of 

vel(x) > 200 pixels/hour & vel(y) > 40 pixels/hour. Definitely not

what we expect from a comet. Also, the speeds in each frame are

not smooth but vary from image to image. The best thing you can

do is review past comet finds. Start with big comets and progress

to the fainter comets. Observe the typical speed, appearance, and

position of the comets. See the comments I made in the archive 

post of May 30 2002 2:01:27. There are several tips for "newbies"

in this post. A link to the archive posts exists at the bottom of

the "Found Something?" link. Good luck.



#COMMENT: SOHO501 

# HEIGHT   DATE     TIME   ANGLE  TEL  FC    COL     ROW

  6.36 2002/07/11 15:30:05 284.0   C2  10  1010.0   629.0

  5.90 2002/07/11 16:06:08 285.6   C2  10   970.0   633.0

  5.60 2002/07/11 16:30:05 287.0   C2  10   943.0   637.0

  5.12 2002/07/11 17:06:08 289.2   C2  10   901.0   640.0

  4.81 2002/07/11 17:30:05 290.9   C2  10   873.0   643.0

  4.35 2002/07/11 18:06:08 294.0   C2  10   831.0   647.0

  4.30 2002/07/12 02:30:05  61.1   C2  10   211.0   672.0

  4.77 2002/07/12 03:06:08  64.0   C2  10   169.0   673.0

  5.07 2002/07/12 03:30:05  65.9   C2  10   141.0   672.0

  5.55 2002/07/12 04:06:08  68.1   C2  10    99.0   672.0

  5.87 2002/07/12 04:30:05  69.3   C2  10    71.0   672.0

  6.32 2002/07/12 05:06:08  71.0   C2  10    31.0   671.0

  6.61 2002/07/12 05:30:05  72.0   C2  10     5.0   670.0



Derek

One more message in red.  This one's rather important.



I feel somewhat sad to have to tell you all that I will be

leaving the SOHO project.  I have accepted a job with the

National Oceanic and Atmospheric Administration (NOAA) in

Boulder, Colorado.  There I will be doing space weather related

work.  There will be no time for comets.  My last real day doing

comets is 4 weeks from today, Sep 13.  I've been letting Derek

take over more of the responsibilities lately, as I'm sure some

of you noticed.  Derek will be handling the comet duties on his

own for a while until we get a replacement for me.  Maybe I'll

be chiming in once in a while, but after Sep 13, I'll just be

one of the 'internet amateurs.'  I start the new job Oct 7.

In case you want to know more about where I'm headed, check out

http://www.sec.noaa.gov/



One project I'll be working on is getting a permanent coronagraph

presence in space, hopefully no later than 2012.



Doug

Possible faint Kreutz in archive FITS images of June 01 2001



Only 4 positions available; I wouldn't normally post this few

with an object this faint but they seem to fit ok. For some

reason I cannot open the following 4 images...



1024 x 1024   0,0 Top Left



01:31   22094807.fts   820  996

01:54   22094808.fts   819  975

02:06   22094809.fts   819  964

02:30   22094810.fts   818  941



Used FLATTEN.EXE 7x7 mean subtraction, bias=40, clipping=150



Congrats, and all the best with your new job Doug!



- Dave

Good luck with the new job, Doug.  Your work here is certainly appreciated, and will be missed.



Dave Johnson

In the screensaver photo, blue with the disc blocking the 

corona, i observed a brilliant streak in the photo, precisely 

halfway between the sun and the edge of the photo. this is in the upper right side.



 the image id 

on that photo was :  8/17



00:42

Possible Marsden Group comet in

C2 images on 2002/08/07-08



Positions 1024x1024 0,0 top-left



2002/08/07 2306 1012,336

           2330  987,330

2002/08/08 0006  947,323

           0030  921,316

           0131  856,298



Small object moving on an apparent Marsden orbit.





Regards,



Toni Scarmato 

Possible Meyer Group comet in

4 images on 2002/08/08



positions 1024x1024 0,0 top-left



0030 1019,252

0131  983,227

0206  967,216

0230  952,207



Object moving on an apparent Meyer orbit

and fading fast.



Regards,



Toni Scarmato

SOHO images of 8-16-2002 appear to have at least three comets and possibly

more than three images of comets with tails that have formed as they approaced 

the sun.

Two objects located in upper right of today's EIT images.



The objects move towards the Sun and diverge from each other.



Motion is rapid, so the movement was detected in the time span

between different wavelength images.



Images anotated to point out objects can be downloaded here:



http://www.astronomydaily.com/images/20020819_1248_eit_195.jpg

http://www.astronomydaily.com/images/20020819_1300_eit_171.jpg

http://www.astronomydaily.com/images/20020819_1306_eit_284.jpg



When the images are stacked in Photoshop, the motion of the 

objects is very consistent.

http://soho.nascom.nasa.gov/data/realtime/javagif/gifs_small/20020819_1130_c2.gif



http://soho.nascom.nasa.gov/data/realtime/javagif/gifs_small/20020819_1154_c2.gif



http://soho.nascom.nasa.gov/data/realtime/javagif/gifs_small/20020819_1206_c2.gif



Sperical matter moving from the west tothe east rapid movement.

About 1 inch below sunblock in first frame  second frame below southwestern flare.  third frame near date and time.

1230 moves over thethe 8 in date. 



Thank you 

Hello, I cannot confirm any comets since the last red posts.



Mark, Jimmy, Tony, & Tom: It is quite obvious from the objects

you report that you are new to the game. A few words of advice:



1.) When posting a claim, we need the date, time, and x & y position

    for at least 4 images. You also need to tell us where x=0,y=0

    is (i.e. top left, bottom right).  This is all explained on

    the 'Found Something?' link from where you posted. Or you can

    simply copy the report format used by the more experienced

    people. 



2.) You will never find a comet without studying past discoveries.

    Look at as many past comets as you possibly can to determine

    the typical appearance, speed, & position of the SOHO comets. 



3.) For a good tutorial on finding SOHO comets, try Sebastian's

    web site http:www.sungrazer.org.  Also, you can obtain much

    knowledge and ask questions pertaining to these comets at

    http://groups.yahoo.com/group/sohohunter/



Since many of you did not post positions I cannot be sure what you

were reporting but most likely you are reporting cosmic rays. Read

Doug's comments from Aug 16th, 12:24:33 regarding the reporting

of cosmic rays by other newbies. Best of luck.



Please email me with any questions regarding these past claims.





Derek

Don't forget that there will be large gaps in the LASCO data

tomorrow.  To see the timeline of events for the offpoint, go to

http://sohowww.nascom.nasa.gov/soc/timeline_aug2002



Doug

OFF TOPIC::



 What is that fuzzy gloublar looking

object on todays C3 images? I be hit in

the head as I can't locate it on my

starmaps. Not M67 as it is about 13d

away from the Sun.

                               X    Y

 At 20020820_2018 UT it is at 329, 268



Bugging the heck out of me....



Mike B. 

OT - Fuzzy object in C3.  Mike, I assume your coordinates

are for the 512x512 images.  If so, I first posted a message

about this object on xxx@xxx last night.

It's the long-period variable star R Leonis.  Odd thing is

that this star should be about 10th magnitude right now

instead of its apparent 6th magnitude -- it won't reach its

next maximum until November.



We exchanged a number of messages about this, and the best

explanation I could come up with is that the Tektronix CCD

array has much better red response than does the eye (i.e.

V-band).  And R Leonis is an extremely red M8 star.  But

it still doesn't explain the fuzzy, comet-like appearance

of the star... --Rob

Possible comet in C3 images diffused

0,0 Top Left  x and y Coordinates 

C3  1024x1024 Images x and y Coordinates

20020821    0942  C3  849 745

20020821    0842  C3  852 750

20020821    0818  C3  852 750

20020821    0742  C3  857 757

20020821    0642  C3  862 763 

20020821    0618  C3  871 767

Thanks John

 

The 0942 time I reported on Aug 21 2002 15:36:43 should have read 20020821 0918 time.

Thanks 

John

What is the comet in the following SWAN images?

(http://sohowww.nascom.nasa.gov/data/summary/swan/swan-images.html)



approximative positions



          from left  from hight      (640 x 512)

              x          y



2001 6 26    548        345

2001 6 28    561        332

2001 6 30    568        321

2001 7 03    574        308

2001 7 04     -          -   (hidden)

2001 7 07     80        286  (extrapolated)

2001 7 10     98        277  (extrapolated)

2001 7 12    102        265  (extrapolated)

2001 7 14    110        260

2001 7 17    122        252

2001 7 19    129        247

2001 7 21    135        245

2001 7 25    144        239

2001 7 27    148        237

2001 7 31    158        233

2001 8 01    159        232

2001 8 03    163        231

2001 8 05    166        230



Roberto Gorelli

C/2001 A2 (LINEAR)



Regards, Sebastian

Haven't found any easy way to determine if this is an

already discovered comet in SWAN, so I figure I'll post

it here.  (This is NOT the extremely bright and obvious

comet approaching from the 4 o'clock position beginning

around July 18th, but another dimmer one riding the

edge of the upper left quadrant).  Coordinates

measured from upper left corner:



               Approximate

Date  X   Y   Lambda  Beta

---- --- ---  ------  ----

7/25 511 231     4     36

7/27 501 225     5     40

7/30 480 213     5     45

8/ 1 467 205     6     49

8/ 3 453 199     7     54

8/ 6 427 185     9     61

8/ 8 413 179    11     64

If I did the math right, the first data point would be

somewhere around RA 23h 10m, Dec +34d, and the last

around RA 21h 47m, Dec +59.



--Rob

[Correction to wording of last post on SWAN comet:

"...riding the edge of the upper RIGHT quadrant."]  --Rob

UPDATE Comet in SWAN:  Looks like it might be Comet Hoenig.

The coordinates are shifted relative to the geocentric

ones I've found, but that could be a combination of

parallax from L1 and the coordinate resolution in the

SWAN GIF images.  --Rob

I found the same object of Matson yesterday but I not 

posted it, I think that there are 2 other positions:

                  x         y



August 10        396       171

July   16         86       268



What is the correct address for to send

discovery of SWAN comets?

Roberto Gorelli

Possible Kreutz faint comet in C3



Positions 1024x1024 0,0 top-left



2002/08/23



0042 685,573

0518 674,565

0542 666,560

0618 655,552

0642 646,546



Faint object moving toward the sun on apparent

Kreutz orbit.





Regards,



Toni Scarmato

Re: SWAN postings



It's indeed comet C/2002 O4 (Hönig).



Note: Before reporting SWAN comets you should check whether this are already known objects. Take the ecliptical coordinates and translate them to equatorial (RA & DEC). This can be done by any good astronomy program. After that use the MPChecker at 

http://scully.harvard.edu/~cgi/CheckMP and look whather it's

already known. Be sure to have the right date and a large search

radius (I suggest 300" - 500" due to the uncertanity of the 

positions).

Such reports should be directed to the CBAT and not to this list.

But be aware: The CBAT has special rules for comet reportings

including a BALCK LIST (i.e. reporting more than two wrong objects

or perhaps even already known ones you can lose the possibility

for any future crediting of real objects).

Be not too eager to find new objects in the images till now. 

Actually they were searched through many times since the discovery

of C/2002 O6 (SWAN).



Regards, Sebastian

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



The object is faint and it is visible in 4 consecutive images

on 2002/08/23 from 10:50 to 11:50 UT. 



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

          col, row

10:50     1017,775  



Xavier Leprette

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

UPDATE :



The object is faint and it is visible in 4 consecutive images

on 2002/08/23 from 10:50 to 11:50 UT. 



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

          col, row

10:50     1017,775 

11:06     1004,753

11:26      987,725 

11:50      967,691



Xavier Leprette

Regarding my last report in C3 the first

positions is 



0442 685,573



Regards,



Toni Scarmato

Xavier: I think it is real, but it is a non group comet.

I had seen it in four b/w images and didn't post it

because four positions are not enough for a non group

and decided to look for the 1024 images later

(and waited possibly a little too long) Congrats!



 Rainer

Possible comet in C3 images diffused 

0,0 Top Left x and y Coordinates 

C3 1024x1024 Images x and y Coordinates 

20020823 2040 C3 873   703 

20020823 1942 C3 881   709 

20020823 1842 C3 889   713 

20020823 1818 C3 889   713 

20020823 1742 C3 892   715

Thanks John 

Correction on my last posted message

Possible comet in C3 images diffused 

0,0 Top Left x and y Coordinates 

C3 1024x1024 Images x and y Coordinates 

20020823 2118 C3 869  699

20020823 2040 C3 873  703 

20020823 1942 C3 881  709 

20020823 1842 C3 889  713 

20020823 1818 C3 891  715

Thanks John 

2002 August 23 - Comet in C3 real-time images starting

at least as early as 16:42.  Approximate positions in

1024x1024 images (0,0 in upper left corner):



YYYY-MM-DD HH:MM Col Row

---------------- --- ---

2002-08-23 16:42 903 724

           17:18 898 720

           17:42 896 719

           18:18 891 715

           18:42 888 713

           19:42 881 708 

           20:40 873 702

           21:18 868 698



--Rob

Hmmm, I don't know why John's posts didn't show up earlier

when I hit refresh -- Xavier's was the last I saw.  Obviously

John and I are tracking the same object -- it's definitely a

comet.  Congrats, John!  --Rob

X3.6-Flare around 01:00 UT on Aug 24!!! Thus comet hunting will be

futile the next hours or days. Perhaps John's comet is visible 

through the snow. My congratulation to your first one.



Regards, Sebastian



PS: I am testing the o-Umlaut (ö) in the Header. perhaps it works

A faint defuse Kreutz in archive C2 gifs of 2002/05/20

Visible in 8 frames. 1024 x 1024 images. 0,0 Top-Left.



11:26    493,  1009

11:50    501,   994

12:06    506,   984

12:26    512,   971

12:50    519,   955

13:27    530,   932

13:50    537,   915

14:06    540,   907



- Dave





 

Possible Kreutz comet in realtime C2 images

Faint and diffuse with possible long tail in 3rd and possible

4th image. However I don't think this is going to be enough

for confirmation. An X/Comet maybe?

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

Image                Col  Row  

20020824_2027_c2.gif 1018 290

20020824_2035_c2.gif 1007 296

20020824_2035_c2.gif 983  312

20020824_2119_c2.gif ?



Michael Oates

Mike,



it`s John Sachs` find of Aug 23.



Regards, Sebastian

Object in C2 images - 20020825_1726 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

     

Date & UT            Size         X and Y 

of Images            used       Coordinates       

--------------------------------------------

20020825_1726.gif  512 x 512    356, 427      

20020825_1750.gif  512 x 512    361, 426

20020825_1806.gif  512 x 512    386, 415

20020825_1826.gif  512 x 512    401, 402 

20020825_1850.gif  512 x 512    416, 393      

----------------

Michael Boschat

Possible Non-group comet in real-time c2 images now.

0,0 in upper left corner



Images                   Size         X, Y



20020826_0026_c2.gif   512 x 512   504, 169

20020826_0050_c2.gif   512 x 512   493, 167

20020826_0127_c2.gif   512 x 512   476, 165

20020826_0150_c2.gif   512 x 512   466, 164

20020826_0206_c2.gif   512 x 512   458, 163

20020826_0226_c2.gif   512 x 512   448, 162



Xingming

Nice find, Xingming -- a fairly bright one w/o tail. --Rob

I can confirm Xingming'S non_group comet!

Congratulation!



Donghua Chen

XingMing'S find seems to be between the Kracht and Marsden tracks

for this time of year (with being closer to the Kracht tracks), 

so it may still be possible that it is a "deviated" member of the

Kracht comets. Nevertheless, congrats to XingMing!



Maik

One correction to last post. The comet is in fact right on track

for a Kracht group comet - only the velocity is too small.



Maik

A very nice find! Congrats Xingming!

It's clearly a Kracht group member.

I can find it in two C3 images:

0,0 in upper left corner 1024*1024

Date     Time  x   y

20020826 0018 624 452

20020826 0042 620 451



Perhaps Derek will find more C3 images.



 Rainer

A very faint Kreutz in archive C2 gifs of 2002/04/28.

Visible in 7 frames. 1024 x 1024 images. 0,0 Top-Left.



It was not possible to locate the object in the 01:27 gif

due to the close proximity and disturbance created by the

image date/time stamp.



01:50    309,   949

02:06    313,   938  (faint tail, just barely visible)

02:26    322,   923

02:50    333,   908

03:26    347,   880

03:50    358,   861

04:06    364,   849



- Dave



 

possible comet in C2 images

b/w 512*512 from the LASCO website

enlarged to 1024*1024

0,0 in upper left corner



Date     Time  x   y

20020827 1426 1020 338

20020827 1450 998 334

20020827 1506 984 332

20020827 1526 966 330



 Rainer

oh! Another a Kracht group member,Congrats Rainer!



Xingming

Comet in C2 in starting at



2002 08 27 1426 1020,340



1024x1024 0,0 top-left



visible in 5 images. Kracht group?



Regards,



Toni Scarmato

Possible commet in C3 at:



(Point 0)

                  X     Y



20020827  1842   944   258

20020827  1847   905   272

20020827  1944   808   324



v/r



John Cummins

UPDATE Kracht group comet in C2 images

I can follow it until 1826 in GIFs 1024*1024

0,0 in upper left corner



Date     Time   x   y

20020827 1726  852 317

20020827 1750  829 314

20020827 1806  813 313

20020827 1826  794 311



 Rainer

Additional data point for possible commet in C3 at:



(Point 0)

                  X     Y



20020827  1842   944   258

20020827  1847   905   272

20020827  1944   808   324

20020827  22:34  639   387





v/r



John Cummins

Possible non group comet in C3 seem

visible in 6 images at positions

1024x1024 0,0 top-left



2002/08/28



1020 838,784

1042 841,782

1118 844,780

1142 846,778

1218 850,775

1242 852,773





Regards,



Toni Scarmato

Hello, I just got back into town and I've only had time to

confirm comet reports from John (Aug 23rd, 2002) and Xingming

(Aug 26th, 2002).  Also, we're considering Xavier's (Aug 23rd, 2002)

claim.



Derek

The sungrazer server was down overnight.  Hope this didn't cause

any problems.  Also, EIT will be baking out for an extended period

this weekend.  Thus, we'll be taking data in C2 and C3 at a higher

than usual rate.  Good news for you comet finders.  Bad news for

those of us who have to reduce the observations.  For more on

bakeouts, go to http://umbra.nascom.nasa.gov/eit/CCD_bakeout.html



Doug

Possible comet in real-time C3



2002/08/29



1024 x 1024  0,0 Top Left



13:42   746  617

14:18   739  613

14:42   734  610



Monitoring and awaiting further images...



- Dave

C3 images   are there more than 1 objects in this area?

That Dave reported.

0,0 Top Left x and y Coordinates 

C3 1024x1024 Images x and y Coordinates 

20020829 1818 C3 699 594

20020829 1742 C3 706 599

20020829 1718 C3 711 603

20020829 1642 C3 719 608

20020829 1618 C3 722 611

20020829 1542 C3 730 615

John

UPDATE   Possible comet in real-time C3



2002/08/29



1024 x 1024  0,0 Top Left



13:42   746  617

14:18   739  613

14:42   734  610

15:18   727  604

15:42   724  602

16:18   717  597

16:42   711  594

17:18   705  590

17:42   700  587

18:18   692  581

18:42   687  578



Also a companion object is visible in the following images:



15:18   733  619

15:42   729  616

16:18   722  610

16:42   718  607

17:18   710  603



- Dave



Monitoring and awaiting further images...



- Dave

Possible sungrazing comet in a real-time C3 images of 2002/08/29

 

It is faint and visible from 17:42 to 19:18 UT in 4 consecutive images. 

The suspect object is moving towards the sun. 



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

 

          col, row

17:42 UT  705,600

 

Is it the Dave'object ?



Xavier Leprette

Possible sungrazing comet in a real-time C3 images of 2002/08/29

UPDATE : (in fact in 1024x1024)

 

It is faint and visible from 17:42 to 19:18 UT in 4 consecutive images. 

The suspect object is moving towards the sun. 



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

          col, row

17:42 UT  705,600

18:18 UT  699,595

18:42 UT  694,592

19:18 UT  682,583 



Xavier Leprette

Congrats John, your comet is trailing offset from the one

I reported by approx x=+6, y=+15 at 15:18 1024x1024 0,0 Top Left

Looks like they'll make a faint but fine pair.



Lets now hope they reach the C2 FOV.



- Dave

Congrats John, I have reported the same object that you,

but too late.



Xavier

UPDATE   To comet pair in real-time C3



2002/08/29



1024 x 1024  0,0 Top Left



There may possibly be a 3rd comet trailing just behind

Johns find -



The object is very faint... Awaiting further images.



1024x1024   0,0 Top Left



17:42   731  624

18:18   725  619

18:42   720  614



- Dave

UPDATE   To possible 3rd comet trailing just behind

Johns find - Re: comet pair in real-time C3



2002/08/29



1024 x 1024  0,0 Top Left



The object is very faint... 1 additional position available.

I'll try to look at the movement of this object in more detail

under higher magnification tomorrow.



1024x1024   0,0 Top Left



17:18   735  627

17:42   731  624

18:18   725  619

18:42   721  615



- Dave

Just noticed the pixel measurements I gave in the previous

report may be off slightly due to a different software package I

was using at that time. The best way for establishing the

location of the 3rd object is to say it is +27, +25 from Johns

object at 18:18   1024x1024  0,0 Top Left. I'll try to get more

accurate measurements when I return from work, but initial indications suggest that the object is ideed real...



- Dave

I have now looked at all claims except for the recent D. Evans

report of a third comet in yesterdays data. Results are below...



Reported By    Date      Camera

-------------------------------

X. Leprette  02/08/23     C2    [Pending]

J. Sachs     02/08/23-24  C2,C3

X. Zhou      02/08/26     C2

R. Kracht    02/08/27     C2

D. Evans     02/08/29     C3    [Pending]

J. Sachs     02/08/29     C3





Derek

possible Meyer group comet in C2 images

b/w 512*512 from the LASCO website

enlarged to 1024*1024

0,0 in upper left corner



Date     Time  x   y

20020830 1154 946 182

20020830 1206 934 170

20020830 1230 906 148

20020830 1254 876 126



 Rainer

UPDATE possible Meyer group comet in C2 images

After looking at the 1024*1024 images

I think it's most probably noise



 Rainer

UPDATE: To comet pair + possible 3rd comet in recent C3

images - Re: the 2 claims of myself and 1 claim from John.

 

There may be evidence to suggest that a 4th member exists !!!



A quadruple cluster of comets perhaps ???



Sharp eyes and a large screen high definition monitor may be a

requirement for this object...



To locate it, look at Johns comet first (in the 16:18 gif image

of 2002/08/29) then look slightly behind and below (in the same

direction as the 3rd comet claim). 



Offset at x=+7, y=+9 (1024x1024 0,0 Top Left) from Johns comet

appears to be a very faint and illusive object that seems to

keep pace with it. Could this be a 4th companion perhaps?



The object seems to be visible in both the preceeding and the

following two images either side of the 16:18 frame.



I would like to ask if anyone else can see this very faint and

illusive object? Or maybe my eyes are just playing tricks...



- Dave

I see what appears to be possible illusive 4th object Dave is tracking.I can not get a position on it.

John 

Possible comet in C3 images   

0,0 Top Left x and y Coordinates 

C3 1024x1024 Images x and y Coordinates 

 20020831 0030 C3 681 640

 20020831 0019 C3 683 641

 20020830 2307 C3 694 649

 20020830 2215 C3 702 654

 John

Disregard my last post of Aug 30 2002 21:37:51

I think it was noise.

John

Non group comet in archival C2 images of 2002 Aug 19.



C2, 1024x1024, 0,0 upper left



22125730.fts  07:32   72, 531

22125731.fts  07:54   60, 545

22125732.fts  08:06   54, 552

22125733.fts  08:30   42, 567

22125734.fts  08:54   33, 581

22125735.fts  09:06   28, 588

22125736.fts  09:30   20, 603



small comet, visible in more images



   Rainer

Confirmation of Rainers non-group comet from 2002 Aug 19



This is a great find, I can see the comet in images up 15:30

all in the GIF images. This one has a very tight curve. It

appears to almost leave the frame at 11:30 but swings back in 

again!



Well done Rainer!



Regards,

Mike