SOHO-LASCO Comet Reports for 200208

Aug 01 2002 09:59:22 mike boschat
aa063@chebucto.ns.ca
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
Aug 01 2002 13:01:43 Derek Hammer
derek@sungrazer.nascom.nasa.gov
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
Aug 01 2002 20:25:30 Rainer Kracht
R.Kracht@t-online.de
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
Aug 01 2002 20:32:40 Rainer Kracht
R.Kracht@t-online.de

>in SWAN images 2002 Mar 03 - 31.
this should read: Mar 12 -31

Rainer
Aug 02 2002 00:54:04 Maik Meyer
maik@comethunter.de
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
Aug 02 2002 00:55:01 Maik Meyer
maik@comethunter.de
Rainer,


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

Regards, Maik
Aug 02 2002 03:19:15 Maik Meyer
maik@comethunter.de
Rainer,


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

Maik
Aug 02 2002 04:02:53 Maik Meyer
maik@comethunter.de
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
Aug 02 2002 06:55:17 Sebastian Hoenig
Sebastian@sungrazer.org
Hi all,


I just inserted Rainer's coordinates into the MPChecker and found
thjet it is C/2002 E2 (Snyder-Murakami).

Regards, Sebastian
Aug 02 2002 09:26:30 Rainer Kracht
R.Kracht@t-online.de
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
Aug 02 2002 13:32:06 Rainer Kracht
R.Kracht@t-online.de
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
Aug 02 2002 15:52:46 David Evans
dave.nokia3330@orange.net


________________________________________________________________

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 -

dvso@blueyonder.co.uk

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

- Dave

________________________________________________________________


Aug 02 2002 18:19:12 Rob Matson
matsonr@saic.com
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

Aug 02 2002 22:00:41 Rob Matson
matsonr@saic.com
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
Aug 03 2002 04:22:18 Maik Meyer
maik@comethunter.de
Rainer,


for the last position using the MPChecker I find 9P/d'Arrest as
a likely candidate.
Btw, congrats, Rob, if confirmed!

Regards, Maik
Aug 03 2002 05:02:29 Maik Meyer
maik@comethunter.de
Rainer,


I have identified your object.

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

Regards, Maik
Aug 03 2002 15:23:02 michael boschat
aa063@chebucto.ns.ca
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
Aug 03 2002 20:40:01 David Evans
dave.nokia3330@orange.net
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
Aug 04 2002 15:29:02 David Evans
dave.nokia3330@orange.net
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


Aug 04 2002 16:11:40 Maik Meyer
maik@comethunter.de
Dave,


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

Maik
Aug 04 2002 16:16:38 David Evans
dave.nokia3330@orange.net
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


Aug 04 2002 16:24:28 David Evans
dave.nokia3330@orange.net
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
Aug 04 2002 18:19:00 David Evans
dave.nokia3330@orange.net
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
Aug 04 2002 18:19:05 David Evans
dave.nokia3330@orange.net
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
Aug 05 2002 19:02:14 Derek Hammer
derek@sungrazer.nascom.nasa.gov
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
Aug 05 2002 19:57:00 Rainer Kracht
R.Kracht@t-online.de
and C/2002 O6 doesn't count?


Rainer
Aug 06 2002 00:21:15 Derek Hammer
derek@sungrazer.nascom.nasa.gov
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
Aug 06 2002 15:17:25 michael boschat
aa063@chebucto.ns.ca
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
Aug 06 2002 15:57:30 Maxime Spano
ngcmax98@yahoo.com
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 .
Aug 06 2002 16:09:03 David Evans
dave.nokia3330@orange.net
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


Aug 06 2002 20:02:47 Dwight Hanson
djhanson@hotpop.com
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
Aug 07 2002 01:17:13 David Evans
dave.nokia3330@orange.net
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
Aug 07 2002 15:22:23 Derek Hammer
derek@sungrazer.nascom.nasa.gov
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
Aug 09 2002 08:00:18 michael boschat
aa063@chebucto.ns.ca
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
Aug 09 2002 11:13:05 Rainer Kracht
R.Kracht@t-online.de
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
Aug 09 2002 13:25:53 mike bosch
aa063@cheb.ns.ca
Disregard my Aug 09 2002 08:00:18

post

MB
Aug 09 2002 16:01:20 Derek Hammer
derek@sungrazer.nascom.nasa.gov
Hello, 


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

Derek
Aug 10 2002 15:35:02 Rainer Kracht
R.Kracht@t-online.de
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

Aug 10 2002 16:06:35 Sebastian Hoenig
Sebastian@sungrazer.org
Confirmation of Rainer's find. It looks good to me.


Regards, Sebastian
Aug 10 2002 17:00:57 Rainer Kracht
R.Kracht@t-online.de
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
Aug 10 2002 17:27:22 Rob Matson
matsonr@saic.com
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
Aug 11 2002 05:07:59 David Evans
dave.nokia3330@orange.net
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
Aug 11 2002 05:16:13 David Evans
dave.nokia3330@orange.net
Update:


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

Another position available...

15:26 569, 1003

- Dave

Aug 11 2002 05:21:45 Sebastian Hoenig
Sebastian@sungrazer.org
Sorry Dave, it's SOHO-494 found by Dave (see below).


Regards, Sebastian
Aug 11 2002 05:22:08 Sebastian Hoenig
Sebastian@sungrazer.org
CORRECTION:


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

Regards, Sebastian
Aug 11 2002 06:59:18 David Evans
dave.nokia3330@orange.net
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
Aug 11 2002 08:02:52 David Evans
dave.nokia3330@orange.net
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

Aug 11 2002 10:18:55 Rainer Kracht
R.Kracht@t-online.de
Dave,

there is no confirmed object at these positions.

Rainer
Aug 11 2002 11:53:54 David Evans
dave.nokia3330@orange.net
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

Aug 11 2002 12:02:02 David Evans
dave.nokia3330@orange.net
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
Aug 12 2002 10:37:25 Rainer Kracht
R.Kracht@t-online.de
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
Aug 12 2002 10:49:31 Maik Meyer
maik@comethunter.de
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
Aug 12 2002 10:56:35 Rainer Kracht
R.Kracht@t-online.de
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
Aug 13 2002 07:48:27 Maxime Spano
ngcmax98@yahoo.com
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.
Aug 13 2002 15:43:13 Spano Maxime
ngcmax98@yahoo.com
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.
Aug 13 2002 15:50:43 Maik Meyer
maik@comethunter.de
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
Aug 13 2002 16:33:40 Rainer Kracht
R.Kracht@t-online.de
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
Aug 13 2002 17:12:13 Rainer Kracht
R.Kracht@t-online.de
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
Aug 13 2002 17:55:39 Michael Oates
mike@ph.u-net.com
Confirmation of Rainers possible Kracht group comet.

Well done that's a quite a faint one.

Regards,

Michael Oates
Aug 14 2002 08:59:47 michael boschat
aa063@chebucto.ns.ca
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
Aug 14 2002 14:17:46 Vinzenz Luebben
vluebben@yahoo.com
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/
Aug 14 2002 14:58:17 Douglas Biesecker
doug@sungrazer.nascom.nasa.gov
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
Aug 14 2002 18:37:48 Terry Lovejoy
lovejoyt@ozemail.com.au
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
Aug 14 2002 20:15:33 David Evans
dave.nokia3330@orange.net
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


Aug 15 2002 00:53:17 Dwight Hanson
djhanson@hotpop.com
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
Aug 15 2002 14:21:05 David Hughes
davescounty@yahoo.com
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
Aug 15 2002 17:37:06 Tallon Atkinson
boogie_1_kenobi@hotmail.com
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")
Aug 15 2002 19:04:44 Trent Peters
issinc2@earthlink.net
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
Aug 16 2002 10:52:01 Martin Chuter
martin@chutercns.freeserve.co.uk
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
Aug 16 2002 11:39:28 George Lopez
georgelopez@telocity.com
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
Aug 16 2002 12:06:23 George Lopez
georgelopez@telocity.com
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
Aug 16 2002 12:24:23 Douglas Biesecker
doug@sungrazer.nascom.nasa.gov
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
Aug 16 2002 12:40:31 Tallon Atkinson
boogie_1_kenobi@hotmail.com
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
Aug 16 2002 14:18:18 Tony Hoffman
tonyhoffman@earthlink.net
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
Aug 16 2002 14:21:47 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
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
Aug 16 2002 14:26:37 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Oops.  Make that, Tuesday Aug 20 the LASCO doors will be closed

from 10:00 UT to 21:00 UT.

Doug
Aug 16 2002 14:31:12 Derek Hammer
derek@sungrazer.nascom.nasa.gov
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
Aug 16 2002 15:44:34 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
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
Aug 16 2002 17:56:39 David Evans
dave.nokia3330@orange.net
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
Aug 16 2002 18:00:09 Johnson David
dej257@worldnet.att.net
Good luck with the new job, Doug.  Your work here is certainly appreciated, and will be missed.


Dave Johnson
Aug 16 2002 22:08:04 mark hoskins
wilbig@xpdit.com
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


Aug 17 2002 10:52:01 Scarmato Toni
toniscarmato@libero.it
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
Aug 17 2002 11:29:35 Scarmato Toni
toniscarmato@libero.it
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
Aug 19 2002 10:42:57 Jimmy Mahuron
jmahuron@blueriver.net
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.
Aug 19 2002 12:17:03 Tony Martin
tmartin@identicosystems.com
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.
Aug 19 2002 12:58:38 Tom Spalding
hickory@evansville.net
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

Aug 19 2002 15:12:54 Derek Hammer
derek@sungrazer.nascom.nasa.gov
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



Aug 19 2002 17:04:37 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

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
Aug 20 2002 21:29:30 mike boschat
aa063@chebucto.ns.ca
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.
Aug 20 2002 23:22:19 Rob Matson
matsonr@saic.com
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 sohohunter@yahoogroups.com 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
Aug 21 2002 15:36:43 John Sachs
imagephoto@blazenet.net

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
Aug 21 2002 16:25:12 John Sachs
imagephoto@blazenet.net
The 0942 time I reported on Aug 21 2002 15:36:43 should have read 20020821 0918 time.

Thanks
John
Aug 22 2002 14:03:29 Gorelli Roberto
md6648@mclink.it
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
Aug 22 2002 14:53:36 Sebastian Hoenig
Sebastian@sungrazer.org
C/2001 A2 (LINEAR)


Regards, Sebastian
Aug 22 2002 20:34:07 Rob Matson
matsonr@saic.com
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
Aug 22 2002 20:36:03 Rob Matson
matsonr@saic.com
[Correction to wording of last post on SWAN comet:

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

Aug 22 2002 20:57:25 Rob Matson
matsonr@saic.com
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
Aug 23 2002 02:24:37 Roberto Gorelli
md6648@mclink.it
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




Aug 23 2002 04:00:31 Scarmato Toni
toniscarmato@libero.it
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
Aug 23 2002 06:00:05 Sebastian Hoenig
Sebastian@sungrazer.org
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
Aug 23 2002 09:14:32 Xavier Leprette
xavier.leprette@wanadoo.fr
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
Aug 23 2002 09:22:15 Xavier Leprette
xavier.leprette@wanadoo.fr
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
Aug 23 2002 09:48:18 Scarmato Toni
toniscarmato@libero.it
Regarding my last report in C3 the first

positions is

0442 685,573

Regards,

Toni Scarmato
Aug 23 2002 10:10:15 Rainer Kracht
R.Kracht@t-online.de
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
Aug 23 2002 18:42:00 John Sachs
imagephoto@blazenet.net
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
Aug 23 2002 18:51:36 John Sachs
imagephoto@blazenet.net
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
Aug 23 2002 19:23:54 Rob Matson
matsonr@saic.com
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
Aug 23 2002 19:26:25 Rob Matson
matsonr@saic.com
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
Aug 23 2002 23:03:17 Sebastian Hönig
Sebastian@sungrazer.org
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
Aug 25 2002 12:45:47 David Evans
dave.nokia3330@orange.net
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


Aug 25 2002 14:23:43 Michael Oates
mike@ph.u-net.com
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
Aug 25 2002 16:08:26 Sebastian Hönig
Sebastian@sungrazer.org
Mike,


it`s John Sachs` find of Aug 23.

Regards, Sebastian
Aug 25 2002 16:39:08 mike boschat
aa063@chebucto.ns.ca
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


Aug 25 2002 23:57:09 XingMing Zhou
zh_x_m@163.net
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


Aug 26 2002 00:13:33 Rob Matson
matsonr@saic.com
Nice find, Xingming -- a fairly bright one w/o tail. --Rob
Aug 26 2002 00:21:39 Donghua Chen
cdh_email@163.net
I can confirm Xingming'S non_group comet!

Congratulation!

Donghua Chen
Aug 26 2002 02:38:55 Maik Meyer
maik@comethunter.de
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
Aug 26 2002 02:58:35 Maik Meyer
maik@comethunter.de
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
Aug 26 2002 10:05:35 Rainer Kracht
R.Kracht@t-online.de
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
Aug 26 2002 15:50:16 David Evans
dave.nokia3330@orange.net
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

Aug 27 2002 12:02:07 Rainer Kracht
R.Kracht@t-online.de
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
Aug 27 2002 12:22:21 XingMing Zhou
zh_x_m@163.net
oh! Another a Kracht group member,Congrats Rainer!


Xingming
Aug 27 2002 13:01:19 Scarmato Toni
toniscarmato@libero.it
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
Aug 27 2002 16:37:07 John Cummins
jklmcummins@attbi.com
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
Aug 27 2002 17:02:42 Rainer Kracht
R.Kracht@t-online.de
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
Aug 27 2002 19:01:20 John Cummins
jklmcummins@attbi.com
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
Aug 28 2002 10:46:28 Scarmato Toni
toniscarmato@libero.it
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
Aug 28 2002 19:54:54 Derek Hammer
derek@sungrazer.nascom.nasa.gov
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
Aug 29 2002 08:22:18 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

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
Aug 29 2002 12:48:47 David Evans
dave.nokia3330@orange.net
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
Aug 29 2002 16:02:59 John Sachs
imagephoto@blazenet.net
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
Aug 29 2002 16:48:52 David Evans
dave.nokia3330@orange.net
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
Aug 29 2002 16:53:34 Xavier Leprette
xavier.leprette@wanadoo.fr
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
Aug 29 2002 17:00:50 Xavier Leprette
xavier.leprette@wanadoo.fr
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
Aug 29 2002 17:09:58 David Evans
dave.nokia3330@orange.net
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
Aug 29 2002 17:14:34 Xavier Leprette
xavier.leprette@wanadoo.fr
Congrats John, I have reported the same object that you,

but too late.

Xavier
Aug 29 2002 17:47:51 David Evans
dave.nokia3330@orange.net
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
Aug 29 2002 19:29:16 David Evans
dave.nokia3330@orange.net
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
Aug 30 2002 01:37:36 David Evans
dave.nokia3330@orange.net
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

Aug 30 2002 04:11:36 Derek Hammer
derek@sungrazer.nascom.nasa.gov
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
Aug 30 2002 09:08:11 Rainer Kracht
R.Kracht@t-online.de
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
Aug 30 2002 10:11:46 Rainer Kracht
R.Kracht@t-online.de
UPDATE possible Meyer group comet in C2 images

After looking at the 1024*1024 images
I think it's most probably noise

Rainer
Aug 30 2002 14:23:12 David Evans
dave.nokia3330@orange.net
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

Aug 30 2002 15:27:24 John Sachs
imagephoto@blazenet.net
I see what appears to be possible illusive 4th object Dave is tracking.I can not get a position on it.

John
Aug 30 2002 21:37:51 John Sachs
imagephoto@blazenet.net
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
Aug 30 2002 21:54:28 John Sachs
imagephoto@blazenet.net
Disregard my last post of Aug 30 2002 21:37:51

I think it was noise.
John
Aug 31 2002 11:38:53 Rainer Kracht
R.Kracht@t-online.de
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
Aug 31 2002 12:02:11 Michael Oates
mike@ph.u-net.com
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