SOHO-LASCO Comet Reports for 200204

Apr 02 2002 12:39:11 Rainer Kracht
R.Kracht@t-online.de
non-group comet in archival C2 images of 1999 Dec 03.


C2, 1024x1024, 0,0 upper left

22057092.fts 21:30 24, 390
22057093.fts 21:54 42, 382
22057094.fts 22:06 50, 379
22057095.fts 22:30 69, 371
22057096.fts 23:30 117, 355

visible in five images only
cometary appearance, no tail, fading

Regards, Rainer
Apr 02 2002 12:42:47 Rainer Kracht
R.Kracht@t-online.de
non-group comet in

b/w 512*512 from the LASCO website
enlarged to 1024*1024
0,0 in upper left corner

Date Time x y
20020402 1555 1000 838
20020402 1610 982 846
20020402 1625 962 854
20020402 1640 942 862

Regards, Rainer

Apr 02 2002 12:50:38 Rainer Kracht
R.Kracht@t-online.de
UPDATE non-group comet in

b/w 512*512 from the LASCO website
enlarged to 1024*1024
0,0 in upper left corner

Date Time x y
20020402 1540 1020 830
20020402 1555 1000 838
20020402 1610 982 846
20020402 1625 962 854
20020402 1640 942 862
20020402 1655 920 870
20020402 1710 900 878
20020402 1725 878 884

Regards, Rainer
Apr 04 2002 08:59:08 Xavier Leprette
xavier.leprette@education.gouv.fr
A possible Kreutz comet in a real-time C2 images now.


The object is faint, without tail and it is visible in 4 consecutive images
on 2002/04/04 from 11:30 to 12:30 UT.

Positions measured from the top-left corner of a 1024x1024 frames :
col, row
11:30 UT 16,921

Others positions soon

Xavier Leprette
Apr 04 2002 09:02:28 Xavier Leprette
xavier.leprette@education.gouv.fr
Possible Kreutz comet in a real-time C2 images now.

UPDATE /

The object is faint, without tail and it is visible in 4 consecutive images
on 2002/04/04 from 11:30 to 12:30 UT.

Positions measured from the top-left corner of a 1024x1024 frames :
col, row
11:30 UT 16,921
11:54 UT 38,905
12:06 UT 49,894
12:30 UT 73,877

Xavier Leprette
Apr 04 2002 09:08:10 xavier Leprette
xavier.leprette@education.gouv.fr
About my previous reports :

In fact the object is faintly condensed and with a short tail.

Xavier
Apr 04 2002 09:12:45 Sebastian Hoenig
Sebastian@sungrazer.org
Another sungrazer in LASCO C2 images starting 13:31 UT


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

Time (x,y)
13:31 102,959
13:54 115,940

Positions approximately as the images are enlarged b/w's.

More on this soon.

Sebastian Hoenig
Apr 04 2002 09:14:54 Sebastian Hoenig
Sebastian@sungrazer.org
Disregard last report. Only noise. I was too fast.


Regards, Sebastian
Apr 04 2002 09:32:56 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
20020404 1354 48 946
20020404 1406 60 938

Regards, Rainer

Apr 04 2002 09:38:03 Rainer Kracht
R.Kracht@t-online.de
UPDATE 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
20020404 1354 48 946
20020404 1406 60 938
20020404 1430 80 920

Regards, Rainer
Apr 04 2002 09:38:38 Sebastian Hoenig
Sebastian@sungrazer.org
New sungrazer in LASCO C2 images, starting 20020404_1354_c2.gif


Date: Apr 04, 2002

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

Time (x,y)
13:54 49,947
14:06 59,939
14:30 81,920

This time it's real ;)

Sebastian Hoenig
Apr 04 2002 10:12:37 Scarmato Toni
toniscarmato@libero.it
Possible comet in C2 512x512 (0,0) top-left corner


2002/04/04

13:31 (30,463)

Other positions at next post

Toni Scarmato
Apr 04 2002 10:16:12 Scarmato Toni
toniscarmato@libero.it
Update positions


512x512 (0,0) top-left corner

2002/04/04

13:31 (29,466)
14:30 (41,460) b/w
14:54 (50,451) b/w

Brigth object well visible also in b/w images

Toni Scarmato
Apr 04 2002 11:54:03 Scarmato Toni
toniscarmato@libero.it
Regarding the comet in C2 reported by Rainer and Sebastian

in 1024 images appear with a
double false nucleus very close.

On images at 14:06 seem visible also two faint tails


Regards,

Toni Scarmato
Apr 04 2002 16:13:31 Rainer Kracht
R.Kracht@t-online.de
Kreutz group comet in archival C2 images of 1999 Nov 26.


C2, 1024x1024, 0,0 upper left

22056955.fts 10:32 379,1008
22056956.fts 10:54 374, 989
22056957.fts 11:06 372, 979
22056958.fts 11:30 367, 958
22056959.fts 11:54 362, 938

visible in five images only
small object, rapidly fading

Regards, Rainer
Apr 04 2002 18:31:09 Rick Govoni
rick@witchdoctor.com
Possible 2 comets in LASCO C2 images


Date: Apr 04, 2002

Brief description 1:
--------------------
Bright sungrazing comet, moderately condensed, no
tail visible

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

Time (x,y)

18:06 14,265
18:54 19,265
19:31 23,264
20:06 26,264
20:30 29,264

Brief description 2:
--------------------
Faint sungrazing comet, tightly condensed, no
tail visible

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

Time (x,y)

18:06 41,192
18:54 46,191
19:31 50,191
20:06 53,191
20:30 55,191

Regards,

Rick Govoni
Apr 04 2002 20:22:02 Rick Govoni
rick@witchdoctor.com
re: previous posting @ Apr 04 2002 18:31:09

please ignore, another newb posting stars me thinks...
Sorry.
Apr 06 2002 15:02:30 Derek Hammer
derek@ra.nascom.nasa.gov
Just a quick note, R. Kracht's archive comet claim for 12/3/99

is actually SOHO179. SOHO is rolled by an angle of ~75 deg at
this time.

Derek

Apr 06 2002 15:07:26 Hammer Derek
derek@ra.nascom.nasa.gov
Sorry, that should read SOHO177.

Apr 08 2002 08:14:40 Rainer Kracht
R.Kracht@t-online.de
Meyer group comet in archival C2 images of 2002 Jan 01.


C2, 1024x1024, 0,0 upper left

22109672.fts 03:54 364, 176
22109673.fts 04:06 376, 164
22109674.fts 04:30 398, 141
22109675.fts 04:54 421, 118
22109676.fts 05:06 431, 108
22109677.fts 05:30 455, 86
22109678.fts 05:54 477, 66
22109679.fts 06:06 488, 56
22109680.fts 06:30 510, 37
22109681.fts 06:54 532, 19

small object on the track of the Meyer group comets

Regards, Rainer
Apr 10 2002 14:49:38 Derek Hammer
derek@ra.nascom.nasa.gov
An update on the latest SOHO comets...


SOHO # Reporter Dates Tel IAUC Designation
------------------------------------------------------------
416 M. Meyer 02/03/25 C2 7862 C/2002 F3
417 R. Kracht 02/04/02 C2 C/2002 G1
418? X. Leprette 02/04/04 C2 ---UNDER REVIEW---
419? R. Kracht 02/04/04 C2 C/2002 G2
420? R. Kracht 99/11/26 C2
421? R. Kracht 02/01/01 C2

Also, the cometary positions reported for 99/10/24 (by R. Kracht)
are indeed C2 positions for SOHO90. An MPEC will appear later this
month.

Derek
Apr 11 2002 12:18:43 michael boschat
aa063@chebucto.ns.ca
OFF TOPIC ---- sorry...


http://www.japantoday.com/e/?content=news&cat=1&id=210973

Comet discoverer Hyakutake dies at 51
Kyodo News
April 11, 2002

KAGOSHIMA - Yuji Hyakutake, an amateur Japanese
astronomer who discovered "Comet" in
1996, died Wednesday evening in Kagoshima
Prefecture, due to internal bleeding caused by a
heart aneurysm, his family said Thursday. He was
51.

Hyakutake, a native of Nagasaki Prefecture, won
international acclaim after he found the new
comet, using a powerful pair of binoculars on Jan
30, 1996, in the town of Hayato in Kagoshima.

Mike Boschat
Apr 12 2002 06:31:07 XingMing Zhou
zh_x_m@163.net
possible non-group comet in real-time c3 images now.

with short tail,from 04:18-09:42

XingMing
Apr 12 2002 06:37:38 XingMing Zhou
zh_x_m@163.net
possible non-group comet in real-time c3 images now.

with short tail,from 04:18-09:42

0,0 in upper left corner.

Images Size X, Y

20020412_0418_c3.gif 512 x 512 215, 507
20020412_0542_c3.gif 512 x 512 214, 506
20020412_0642_c3.gif 512 x 512 213, 505
20020412_0742_c3.gif 512 x 512 212, 504
20020412_0842_c3.gif 512 x 512 211, 503
20020412_0942_c3.gif 512 x 512 209, 503


XingMing Zhou
Apr 12 2002 06:47:24 XingMing Zhou
zh_x_m@163.net
update:

The comet is visual from Apr.11 23:18-now.

XingMing
Apr 12 2002 06:52:44 Jon Shanklin
j.shanklin@bas.ac.uk
Non kreutz comet coming into view from about 00:00 on April 12 at bottom of C3 realtime frames.  Object is slowly moving to left of image at about 45 degrees.


Jon
Apr 12 2002 08:36:58 Chen DongHua
cdh_email@163.net
Yes, I can confirm Zhou's finding.

Congratulations!!
Apr 12 2002 09:55:51 Scarmato Toni
toniscarmato@libero.it
Possible Kreutz comet in C3 


1024x1024 (0,0) top-left corner

2002/04/12

11:18 (380,702)
11:42 (385,694)
12:18 (395,685)
12:42 (405,678)


Faint object moving toward the sun.


Toni Scarmato
Apr 12 2002 09:58:34 Scarmato Toni
toniscarmato@libero.it
Sorry,

the last position of the previous report
is

12:42 (400,678)

Toni Scarmato
Apr 12 2002 16:54:54 Rainer Kracht
R.Kracht@t-online.de
bright sungrazer coming in in the lower left

corner of the C2 field 20:06 UTC
Apr 12 2002 16:57:02 Rainer Kracht
R.Kracht@t-online.de
bright sungrazer with tail 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
20020412 2006 80 1000
20020412 2026 96 986

Regards, Rainer

Apr 12 2002 17:16:38 Rob Matson
matsonr@saic.com
I was going to report an extremely bright comet in C2,

but I see Rainer has beat me to it. Congratulations --
it's a whopper! Unfortunately, given that it is so
bright, it must have been visible in C3 -- and perhaps
this is the C3 comet that was reported earlier... --Rob

Apr 12 2002 18:01:03 Rainer Kracht
R.Kracht@t-online.de
Rob,

I think it was behind the pylon in C3.
Toni's object would have entered the C2 field much earlier.
(if there was an object...)

Regards, Rainer
Apr 13 2002 02:31:13 li hao
xiaohaozi101@163.com
time             x   y

20020412_2050_c2 58 482
20020412_2126_c2 71 470
20020412_2150_c2 81 461
20020412_2226_c2 96 445
Apr 13 2002 08:48:01 Alex Roca
ALEXROCARAMON@terra.es
Possible comet in LASCO c3 

0,0 upper left corner image 1024 x 1024

20020413 06 42 374 967
20020413 07 42 372 965
20020413 08 42 369 962
20020413 09 42 367 960
it is brilliant
Regards
Alex Roca
Apr 13 2002 08:54:25 Maik Meyer
maik@comethunter.de
Alex,


this is C/2002 G3 (SOHO), found yesterday by Xing-Ming Zhou. A
first and preliminary orbit can be found in MPEC 2002-G51. Just
scroll down to see the messages concerning this non-Kreutz.

Maik
Apr 13 2002 09:02:33 Alex Roca
ALEXROCARAMON@terra.es
Possible comet in LASCO c3

0,0 upper left corner image 1024 x 1024
it is brilliant. it has tail

20020413 0642 374,967
20020413 0742 372,965
20020413 0842 369,962
20020413 0942 367,960
20020413 1042 365,957
Regards
Alex Roca
Apr 13 2002 09:11:59 Alex Roca
ALEXROCARAMON@terra.es
Possible comet in LASCO c3

0,0 upper left corner image 1024 x 1024
it is brilliant

20020413 1118 363,956

Regards

Alex Roca
Apr 13 2002 09:25:07 Alex Roca
ALEXROCARAMON@terra.es
I'm sorry

I read of the discovery of Xing Ming
but I don't realize that this comet was the same.
I begg your apologies.
Regards
Alex Roca
Apr 13 2002 10:41:27 Scarmato Toni
toniscarmato@libero.it
Possible non Kreutz comet in C2


1024x1024 (0,0) top-left corner

2002/04/13

12:50 (847,1016)
13:27 (830,992)
13:50 (820,974)


Regards,

Toni Scarmato
Apr 13 2002 11:15:30 Scarmato Toni
toniscarmato@libero.it
Regarding my last rfeport nothing seem visible

on image at 14:06

Regards,

Toni Scarmato
Apr 14 2002 11:24:24 Rainer Kracht
R.Kracht@t-online.de
Meyer group comet in archival C2 images of 1999 Mar 17.


C2, 1024x1024, 0,0 upper left

22040959.fts 07:27 14, 111
22040960.fts 07:54 43, 85
22040961.fts 08:26 79, 55
22040962.fts 08:54 110, 31
22040963.fts 09:26 148, 4

moderately bright, should be visible in C3 also

Regards, Rainer
Apr 14 2002 13:19:11 Tom Glinos
tg@utstat.toronto.edu
What is the object moving from 6 o'clock to 8 o'clock on the 25 images that I just downloaded on Sunday, April 14, at 17h UT?


Thank you for your help!

Sincerely
Tom Glinos
Apr 15 2002 05:54:49
 
Apr 15 2002 08:04:10 Douglas Biesecker
doug@sungrazer.nascom.nasa.gov
Hi folks,

The comet first reported on Friday by XingMing Zhou is
brightening up quite nicely. According to the ephemeris produced
by Brian Marsden in MPEC 2002 G51 the comet will be in the LASCO
C3 field of view until Saturday. It should continue to brighten
for the next couple of days. Expect lots of newbie reports
for a comet like this. For all you newbies, the comet I am talking
about is the one moving from the bottom center up towards the left
side of the images. The comet won't make it into the C2 field.

I haven't yet checked any of the other recent reports.

Doug
Apr 15 2002 13:32:22 michael boschat
aa063@chebucto.ns.ca
Off topic --- Solar material 

falling back to Sun in C2?

Images from 20020415_1406 to 1606 UT

At positions 85, 340, & 95, 333, ect with my
0,0 at 460 in lower left corner and using
the 512 images there seems to be
some ejecta falling back to the Sun near 8 pm
position?
Looks very interesting, rest is moving away
from Sun but this part is moving "towards"
the Sun.

Mike Boschat
Apr 15 2002 13:46:17 Douglas Biesecker
doug@sungrazer.nascom.nasa.gov
Coronal Inflows have been seen quite often.  We didn't see them at

all during solar minimum, but we see them frequently at solar
maximum. They tend to occur in the same place over and over again.
The current thinking is that they are the result of magnetic
reconnection/reorganization in the corona, associated with coronal
hole boundaries. There was a hotshot on this back in November.
(Note, the current hotshot is the X.M. Zhou comet C/2002 G3).
The inflows also appeared on Astronomy Picture of the Day (APOD)
on Nov, 29, 2001.

http://antwrp.gsfc.nasa.gov/apod/ap011129.html
http://sohowww.nascom.nasa.gov/hotshots/2001_11_20/

Doug
Apr 15 2002 20:28:00 Rob Matson
matsonr@saic.com
Only one C3 frame (4/15 23:42) has appeared subsequent to

4/15 18:18, but in this frame it appears that XingMing Zhou's
comet has split into two bright pieces. Awaiting further
frames to confirm. --Rob

Apr 16 2002 09:43:52 Scarmato Toni
toniscarmato@libero.it
Possible comet in C3


1024x1024 (0,0) top-left

2002/04/16

11:18 (309,642)
11:42 (313,638)
12:18 (318,632)
12:42 (322,626)

I am waiting other images to confirm.

Regards

Toni Scarmato
Apr 16 2002 10:38:36 Claus Vester
cv@cclive.net
Possible comet in LASCO C3 images


Date: Apr 15, 2002

Brief description:
Faint sungrazing comet, moderately condensed, no
tail visible

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

Time (x,y)

00:18 278,836
00:42 277,833
01:42 275,828
02:18 274,825
02:42 272,822
03:18 272,821
03:42 271,816
04:18 271,815
04:42 269,813
05:18 268,860
05:42 268,807
06:18 266,804
06:42 266,804
07:42 265,798
08:18 265,796

Regards,
Claus Vester
Apr 16 2002 11:31:25 Claus Vester
cv@cclive.net
Possible comet in LASCO C3 images


Date: Apr 15-16, 2002

possible same comet as reported earlier (continued observation)

15. Apr. 21:42 Point 0: X=249 Y=315 Height= 1.403E7 Julian minutes = 3831702
15. Apr. 22:18 Point 1: X=249 Y=321 Height= 1.388E7 Julian minutes = 3831738
15. Apr. 23:18 Point 2: X=249 Y=330 Height= 1.365E7 Julian minutes = 3831798
15. Apr. 23:42 Point 3: X=250 Y=331 Height= 1.360E7 Julian minutes = 3831822
16. Apr. 01:44 Point 4: X=250 Y=349 Height= 1.317E7 Julian minutes = 3831944
16. Apr. 02:42 Point 5: X=251 Y=357 Height= 1.296E7 Julian minutes = 3832002
16. Apr. 03:18 Point 6: X=252 Y=361 Height= 1.283E7 Julian minutes = 3832038
16. Apr. 03:42 Point 7: X=253 Y=366 Height= 1.269E7 Julian minutes = 3832062
16. Apr. 04:18 Point 8: X=253 Y=370 Height= 1.261E7 Julian minutes = 3832098
16. Apr. 04:42 Point 9: X=253 Y=374 Height= 1.252E7 Julian minutes = 3832122
16. Apr. 05:18 Point 10: X=254 Y=379 Height= 1.238E7 Julian minutes = 3832158
16. Apr. 05:42 Point 11: X=255 Y=384 Height= 1.225E7 Julian minutes = 3832182
16. Apr. 06:18 Point 12: X=255 Y=389 Height= 1.215E7 Julian minutes = 3832218
16. Apr. 06:42 Point 13: X=256 Y=391 Height= 1.207E7 Julian minutes = 3832242
16. Apr. 07:42 Point 14: X=257 Y=401 Height= 1.185E7 Julian minutes = 3832302
16. Apr. 08:18 Point 15: X=260 Y=408 Height= 1.162E7 Julian minutes = 3832338
16. Apr. 08:42 Point 16: X=260 Y=410 Height= 1.158E7 Julian minutes = 3832362
16. Apr. 09:18 Point 17: X=262 Y=417 Height= 1.139E7 Julian minutes = 3832398
16. Apr. 09:42 Point 18: X=263 Y=421 Height= 1.129E7 Julian minutes = 3832422
16. Apr. 10:38 Point 19: X=265 Y=430 Height= 1.107E7 Julian minutes = 3832478
16. Apr. 11:42 Point 20: X=268 Y=440 Height= 1.081E7 Julian minutes = 3832542
16. Apr. 12:18 Point 21: X=269 Y=447 Height= 1.068E7 Julian minutes = 3832578
16. Apr. 12:42 Point 22: X=271 Y=451 Height= 1.055E7 Julian minutes = 3832602
16. Apr. 13:42 Point 23: X=274 Y=461 Height= 1.031E7 Julian minutes = 3832662
16. Apr. 14:18 Point 24: X=276 Y=467 Height= 1.017E7 Julian minutes = 3832698

Regards

Claus Vester
Apr 16 2002 11:57:19 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Hi Claus,

The comet you are reporting is the same one that was
first reported last Friday. The comet has been officially
reported and is designated C/2002 G3. The comet will continue
to be visible in the LASCO C3 images until Saturday. By the way,
you did everything exactly right except for two things. One is
that you don't need to report so many positions. The first post
you made was more than sufficient. Second is that you reported
something already identified. But, this has always been a weakness
of our current system. I suppose we could include annotated
versions of recent images to indicate the objects.

Doug
Apr 16 2002 12:11:30 Micahel Neal
mike@mrneal.com
Doug wrote: "I suppose we could include annotated

versions of recent images to indicate the objects."

Great idea!
mike
Apr 16 2002 12:21:14 Maciej Reszelski
macres@pro.onet.pl

Off-topic! : need help...

Sorry that I send this to form but I have possible
problem with pixel measurment. From three C/2002 G3
images I have a x,y vaues (upper, left):

16-04-2002 08:41 259,607
16-04-2002 12:18 269,572
16-04-2002 12:42 270,568

I using Paint Shop Pro 5. Is these values correct??
Existing any low-memory program (better) which can
measure pixels coordinates?

Again sorry and thanks!!!
Best regards,
Maciej
Apr 16 2002 18:04:51 Claus Vester
cv@cclive.net
Possible comet in LASCO C3 images


Date: Apr 16, 2002

Brief description:
possibly faint comet, fast eliptical moving, no tail visible

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

Time (x,y)

02:42 X=516 Y=270
03:18 X=538 Y=286
03:42 X=584 Y=310
04:18 X=622 Y=298
04:42 X=649 Y=278

Regards,

Claus Vester
Apr 17 2002 03:09:53 Kazimieras Cernis
cernis@itpa.lt
Possible comet in C3 real time images now

To the right of pylon. On many images.
0,0 in bottom left corner in 1024x1024 images.

DATE TIME TEL COL ROW
2002/04/17 4:42 C3
5:18 C3
5:42 C3
6:18 C3




Kazimieras Cernis
Apr 17 2002 03:17:38 Kazimieras Cernis
cernis@itpa.lt
Possible comet in C3 real time images now

To the right of pylon. On many images.
0,0 in bottom left corner in 1024x1024 images.

DATE TIME TEL COL ROW
2002/04/17 4:42 C3
5:18 C3
5:42 C3 347 287
6:18 C3 352 291




Kazimieras Cernis
Apr 17 2002 03:21:46 Kazimieras Cernis
cernis@itpa.lt
Possible comet in C3 real time images now

To the right of pylon. On many images.
0,0 in bottom left corner in 1024x1024 images.

DATE TIME TEL COL ROW
2002/04/17 4:42 C3 341 281
5:18 C3 345 285
5:42 C3 347 287
6:18 C3 352 291




Kazimieras Cernis
Apr 17 2002 03:37:50 Pavel Shkreby
pavelsh@internet.kuban.ru
Possible sungrazing comet in a real-time C3 images now.

Visible from 2002/04/17 04:42 UT in 4 consecutive frames.
Telescope - C3
Position in last images
Time X Y
04:42 - 341.742
05:18 - 345.737
05:42 - 347.736

1024x1024 0.0 - upper left corner
----------
Pavel Shkreby
Apr 17 2002 03:44:38 Pavel Shkreby
pavelsh@internet.kuban.ru
Possible sungrazing comet in a real-time C3 images now.

Visible from 2002/04/17 04:42 UT in 4 consecutive frames.
Telescope - C3
Position in last images
Time X Y
04:42 - 341.742
05:18 - 345.737
05:42 - 347.736
06:18 - 351.732
1024x1024 0.0 - upper left corner
----------
Pavel Shkreby
Apr 17 2002 07:15:03 michael boschat
aa063@chebucto.ns.ca
Not sure if we're supposed to do this but,

I can confirm Kazimieras Cernis find.

Mike Boschat
Apr 17 2002 08:58:10 Scarmato Toni
toniscarmato@libero.it
Another possible comet in C3


1024x1024 (0,0) top-left corner

2002/04/17

09:42 faint?
10:38 (223,727)
11:18 (228,723)
11:42 (231,721)

Object at left of the pylon moving toward the sun
I am waiting other images to confirm

Regards,

Toni Scarmato




Apr 17 2002 09:25:48 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi all,
I've checked all of the claims up to K. Cernis' report
from earlier today. Here's the latest list of recently confirmed
comets.

SOHO # Observer Dates Telescopes
-------------------------------------------
422 X.M. Zhou 02/04/11-now C3
423 R. Kracht 02/04/12-13 C2
424 R. Kracht 99/03/17 C2
425 K. Cernis 02/04/17 C3 so far

Rough positions further below.

It's now time to organize the contest for predicting the perihelion
date of SOHO-500. The prize is to be determined. Probably a choice
of dinner at my house (where you can sample my home brewed beer) or
dinner at a reasonable restaurant of your choice. For the overseas
folks, you'll just have to wait until we're in the same place. Of
course, it also means I'll have to reveal when I'm travelling and
to where I'm headed. The guesses can come in anytime between now
and the earlier of the discovery of SOHO-450 or May 31, 2002.

Not quite sure what to do if SOHO-500 is archival. My preference
is just to give the prize to whoever is closest, no matter what.
Thus, the earliest date is likely to win in that case. However,
there is always the chance some unscrupulous person could have
an archive claim that they hold on to until SOHO-499 comes along.
But, the prize is not really all that great, so who'd want to
cheat?

#COMMENT: COMET SOHO-423
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
8.06 2002/04/12 19:50:06 137.8 C2 10 66.0 12.0
7.86 2002/04/12 20:06:05 138.1 C2 10 80.0 23.0
7.62 2002/04/12 20:26:05 138.3 C2 10 95.0 37.0
7.31 2002/04/12 20:50:06 138.5 C2 10 114.0 55.0
6.84 2002/04/12 21:26:09 138.9 C2 10 143.0 82.0
6.51 2002/04/12 21:50:05 139.2 C2 10 163.0 101.0
6.29 2002/04/12 22:06:06 139.4 C2 10 177.0 114.0
6.02 2002/04/12 22:26:05 139.6 C2 10 193.0 130.0
5.44 2002/04/12 23:06:06 140.4 C2 10 229.0 163.0
5.13 2002/04/12 23:26:05 140.7 C2 10 247.0 181.0
4.75 2002/04/12 23:50:05 141.3 C2 10 270.0 203.0
4.51 2002/04/13 00:06:07 141.7 C2 10 285.0 217.0
4.19 2002/04/13 00:26:05 142.3 C2 10 304.0 235.0

#COMMENT: COMET SOHO-424
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
7.72 1999/03/17 07:26:50 50.6 C2 10 15.0 912.0
7.68 1999/03/17 07:54:05 47.2 C2 10 43.0 938.0
7.63 1999/03/17 08:26:05 43.0 C2 10 79.0 968.0
7.59 1999/03/17 08:54:05 39.4 C2 10 111.0 992.0
7.58 1999/03/17 09:26:05 35.2 C2 10 148.0 1019.0

#COMMENT: COMET SOHO-425
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
18.44 2002/04/17 03:18:05 144.4 C3 10 332.0 271.0
18.15 2002/04/17 03:42:05 144.4 C3 10 335.0 275.0
17.91 2002/04/17 04:18:05 144.6 C3 10 338.0 278.0
17.58 2002/04/17 04:42:05 144.7 C3 10 342.0 282.0
17.34 2002/04/17 05:18:05 144.9 C3 10 345.0 285.0
17.10 2002/04/17 05:42:05 145.0 C3 10 348.0 288.0
16.81 2002/04/17 06:18:05 145.0 C3 10 351.0 292.0
16.60 2002/04/17 06:42:05 145.0 C3 10 353.0 295.0
16.03 2002/04/17 07:42:06 145.4 C3 10 360.0 302.0
15.68 2002/04/17 08:18:06 145.8 C3 10 365.0 306.0
15.47 2002/04/17 08:42:05 145.8 C3 10 367.0 309.0
15.23 2002/04/17 09:18:05 146.0 C3 10 370.0 312.0
14.91 2002/04/17 09:42:07 146.2 C3 10 374.0 316.0
14.39 2002/04/17 10:38:09 146.8 C3 10 381.0 322.0
14.03 2002/04/17 11:18:13 146.9 C3 10 385.0 327.0
Apr 17 2002 10:47:46 michael boschat
aa063@chebucto.ns.ca
Comet SOHO-422 anti-tail?


I was looping images of SOHO-422 and I
noticed on the images what I thought was
a thin line at the front of the comet or
anti-tail.
I also reversed the images to black on white
and it was still there.

Is there a faint anti-tail or is this some
pixel effects?

I was using todays 512 images from 1118 UT to 1242 UT

Sorry for off-topic

Thanks


Mike Boschat



Apr 17 2002 12:38:09 michael boschat
aa063@chebucto.ns.ca
  Anti-tail, or something in front

of Comet SOHO-422 at 20020417_1242 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
--------------------------------------------
20020417_1242.gif 512 x 512 207, 126
20020417_1342.gif 512 x 512 211, 121
20020417_1418.gif 512 x 512 214, 118
20020417_1442.gif 512 x 512 215, 116

----------------
Michael Boschat
Apr 17 2002 13:48:45 Xavier Leprette
xavier.leprette@education.gouv.fr
Possible sungrazer comet in a real-time C2 images now 


It is visible on 2002/04/17 from 16:26 to 17:06 UT in 3 consecutive frames
The object is faint, without a tail and it is moving towards the sun.

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

col, row
16:26 75,492


I'm waiting other images to confirm my report.

Xavier Leprette
Apr 17 2002 13:56:46 Xavier Leprette
xavier.leprette@education.gouv.fr
Possible sungrazer comet in a real-time C2 images now 


UPDATE: I can confirm my previous report.

It is visible on 2002/04/17 from 16:26 to 17:26 UT in 4 consecutive frames
The object is faint, without a tail and it is moving towards the sun.
I don't know if it is the current Cernis'comet ?

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

col, row
16:26 75,492
16:50 83,484
17:06 88,478
17:26 95,472

Xavier Leprette
Apr 17 2002 14:07:05 Rainer Kracht
R.Kracht@t-online.de
Xavier,


I have seen this also, but because it is
so faint, I decided to wait for another
image to see if its real...
It is not Cernis'comet, which will enter C2
around 23 UTC.

Regards, Rainer
Apr 17 2002 14:12:33 Rainer Kracht
R.Kracht@t-online.de
UPDATE 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
20020417 1606 138 1000
20020417 1626 150 984
20020417 1706 176 956
20020417 1726 190 944
20020417 1750 206 928

It's still there: congrats Xavier!

Regards, Rainer

Apr 17 2002 14:41:48 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi again,
Whew! What a day. Three comets in SOHO/LASCO at the same
time. Two in C3 and one in C2. Cool!!!!


Confirmation of X. Leprette's C2 Kreutz family comet
in data from April 17, 2002. Positions below:

Doug

#COMMENT: COMET SOHO-426
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
7.19 2002/04/17 16:26:05 142.8 C2 10 151.0 38.0
7.40 2002/04/17 16:06:06 142.7 C2 10 139.0 25.0
6.93 2002/04/17 16:50:05 143.0 C2 10 166.0 54.0
6.76 2002/04/17 17:06:05 143.1 C2 10 176.0 65.0
6.52 2002/04/17 17:26:05 143.5 C2 10 191.0 79.0
6.25 2002/04/17 17:50:05 143.8 C2 10 207.0 95.0
6.05 2002/04/17 18:06:05 144.1 C2 10 219.0 107.0

Apr 17 2002 14:53:19 Rob Matson
matsonr@saic.com
You guys take all the fun out of this.  Every time I

find a comet in C2, one of the "old-timers" has beat
me to it by 20 minutes. I don't know why I bother
wasting my time. Do you guys ever sleep? --R
Apr 17 2002 15:00:24 Maciej Reszelski
macres@pro.onet.pl
Rob my feelings are the same :)

Just I was out from my computer and Xavier found one... :)

For disscusions like this I create a yahoo group "sohohunter".
I must configure this list. It will be available on next morning.

It may be useful and clearing post on this page ;)

Best regards,
Maciej
Apr 17 2002 17:23:35 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I've now added, on a trial basis, an annotated LASCO image which
shows the 'latest' comet discovered. On the forms page "Found
Something?", you'll find the link just above where you enter
your name to report a discovery.

I'll probably make it two links. One for C3 and one for C2.

Doug
Apr 17 2002 19:40:44 Rainer Kracht
R.Kracht@t-online.de
SOHO-425 (Cernis) has entered the C2 field

0,0 in upper left corner

Date Time x y
20020417 2306 282 1020
20020417 2326 294 1006

Regards, Rainer
Apr 18 2002 01:19:33 XingMing Zhou
zh_x_m@163.net
Possible sungrazer comet in real-time c2 images now.


0,0 in upper left corner

Images Size X, Y

20020418_0306_c2.gif 512 x 512 86, 489
20020418_0326_c2.gif 512 x 512 94, 482
20020418_0350_c2.gif 512 x 512 103, 472
20020418_0406_c2.gif 512 x 512 108, 466

XingMing Zhou
Apr 18 2002 04:10:42 Maciej Reszelski
macres@pro.onet.pl
Dear all,


If you would like to become a member of this group, please
visit http://groups.yahoo.com/group/sohohunter/join
or send email to sohohunter-subscribe@yahoogroups.com

Michael Neal pointed me about new Yahoo! Privat Policy.
Mostly of us subscribe comets-ml so we are on Yahoo! Database...
For details see:
http://groups.google.com/groups?q=Yahoo+Privacy+Policy&start=10&hl=en&selm=3ca7db21.972328%40news.newsguy.com&rnum=18

Maybe I find much better forum/discussion schemes. When I find
I will write...

Best regards,
Maciej
Apr 18 2002 17:58:43 Rob Matson
matsonr@saic.com
Report or confirmation of comet in C2 beginning at 02:06

on 4/18. This may be the same object reported by XingMing
Zhou at 01:19:33 (512 x 512 coords). Positions are from
1024 x 1024 image, 0,0 in upper left corner:

04/18 0206 130, 1021
0226 144, 1006
0250 161, 989
0306 173, 977
0326 187, 962
0350 205, 944

--Rob


Apr 19 2002 00:47:43 XingMing Zhou
zh_x_m@163.net
Possible sungrazer comet in real-time c2 images now.

It's faint.
0,0 in upper left corner

Images Size X, Y

20020419_0226_c2.gif 512 x 512 200, 507
20020419_0250_c2.gif 512 x 512 208, 496
20020419_0306_c2.gif 512 x 512 213, 489

XingMing Zhou
Apr 19 2002 01:32:05 XingMing Zhou
zh_x_m@163.net
Update:

Possible sungrazer comet in real-time c2 images now.
It's faint.
0,0 in upper left corner

Images Size X, Y

20020419_0226_c2.gif 512 x 512 200, 506
20020419_0250_c2.gif 512 x 512 208, 496
20020419_0306_c2.gif 512 x 512 213, 489
20020419_0326_c2.gif 512 x 512 220, 479

XingMing Zhou
Apr 19 2002 13:42:21 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi all,
Confirming the two latest C2 finds by X.-M. Zhou. They
are both Kreutz family comets. Rough positions given below.
SOHO-422 has faded after giving us a good week of images. Also,
just to note a milestone, with SOHO-426, X. Leprette discovered
his 50th SOHO comet.

#COMMENT: COMET SOHO-427
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
7.69 2002/04/18 02:06:05 143.2 C2 11 129.0 2.0
7.45 2002/04/18 02:26:05 143.5 C2 11 144.0 16.0
7.17 2002/04/18 02:50:06 143.9 C2 10 161.0 33.0
6.98 2002/04/18 03:06:05 143.9 C2 10 171.0 46.0
6.72 2002/04/18 03:26:05 144.3 C2 10 187.0 61.0
6.42 2002/04/18 03:50:06 144.7 C2 10 205.0 79.0
6.21 2002/04/18 04:06:05 145.0 C2 10 217.0 92.0
5.98 2002/04/18 04:26:05 145.2 C2 10 230.0 106.0
5.63 2002/04/18 04:50:05 145.9 C2 10 251.0 127.0
5.48 2002/04/18 05:06:05 146.4 C2 10 262.0 135.0

#COMMENT: COMET SOHO-428
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
6.21 2002/04/19 02:26:05 167.7 C2 10 400.0 10.0
5.91 2002/04/19 02:50:05 169.0 C2 10 416.0 32.0
5.71 2002/04/19 03:06:05 169.8 C2 10 426.0 47.0
5.47 2002/04/19 03:26:06 171.3 C2 10 441.0 65.0
5.22 2002/04/19 03:50:05 172.7 C2 10 455.0 84.0
Apr 19 2002 15:43:48 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20020419_1618 UT


having problems connecting to
SOHO site to get more images.

****** 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
--------------------------------------------
20020419_1618.gif 512 x 512 157, 368
20020419_1642.gif 512 x 512 159, 365
20020419_1718.gif 512 x 512 163, 362
20020419_1742.gif 512 x 512 164, 359

----------------
Michael Boschat
Apr 19 2002 17:42:33 Mark Ledingham
mark-le@online.no
SOHO LASCO C3

Latest 25 jpg Images (approx. 4275 kb) as of Fri Apr 19 21:20:48 GMT 2002

Point 0: X=695 Y=837 Height= 1.431E7 Julian minutes = 3836478
Point 1: X=696 Y=838 Height= 1.437E7 Julian minutes = 3836502
Point 2: X=695 Y=838 Height= 1.435E7 Julian minutes = 3836538
Point 3: X=696 Y=837 Height= 1.433E7 Julian minutes = 3836562
Point 4: X=696 Y=838 Height= 1.437E7 Julian minutes = 3836622
Point 5: X=696 Y=838 Height= 1.437E7 Julian minutes = 3836658
Apr 19 2002 17:44:42 Mark Ledingham
mark-le@online.no
Possible comet?


SOHO LASCO C3
Latest 25 jpg Images (approx. 4275 kb) as of Fri Apr 19 21:20:48 GMT 2002

Point 0: X=695 Y=837 Height= 1.431E7 Julian minutes = 3836478
Point 1: X=696 Y=838 Height= 1.437E7 Julian minutes = 3836502
Point 2: X=695 Y=838 Height= 1.435E7 Julian minutes = 3836538
Point 3: X=696 Y=837 Height= 1.433E7 Julian minutes = 3836562
Point 4: X=696 Y=838 Height= 1.437E7 Julian minutes = 3836622
Point 5: X=696 Y=838 Height= 1.437E7 Julian minutes = 3836658

- Mark Ledingham
Apr 20 2002 07:29:49 Silvia Alonso-Pérez
silvialonso@terra.es
Posible comet on real-time images of Sat Apr 20 10:59:46 GMT 2002. Very faint. ¿Probably an asteroid?


Point 1: X=4 Y=653 Height= 4537720 Julian minutes = 3837470
Point 2: X=7 Y=653 Height= 4512875 Julian minutes = 3837486
Point 3: X=12 Y=654 Height= 4473947 Julian minutes = 3837506
Point 4: X=20 Y=655 Height= 4410348 Julian minutes = 3837546
Point 5: X=23 Y=655 Height= 4385596 Julian minutes = 3837566
Point 6: X=29 Y=655 Height= 4336132 Julian minutes = 3837590
Point 7: X=31 Y=656 Height= 4322231 Julian minutes = 3837606
Point 8: X=36 Y=656 Height= 4281092 Julian minutes = 3837626
Point 9: X=41 Y=656 Height= 4239992 Julian minutes = 3837650
Point 10: X=48 Y=657 Height= 4185200 Julian minutes = 3837687
Point 11: X=52 Y=658 Height= 4155133 Julian minutes = 3837710
Point 12: X=55 Y=658 Height= 4130581 Julian minutes = 3837726
Point 13: X=60 Y=658 Height= 4089698 Julian minutes = 3837746
Point 14: X=64 Y=657 Height= 4054245 Julian minutes = 3837770
Point 15: X=79 Y=660 Height= 3940567 Julian minutes = 3837846
Point 16: X=83 Y=661 Height= 3911037 Julian minutes = 3837866
Point 17: X=104 Y=661 Height= 3741292 Julian minutes = 3837966
Point 18: X=108 Y=662 Height= 3712201 Julian minutes = 3837986
Point 19: X=58 Y=633 Height= 4042331 Julian minutes = 3838010
Point 20: X=95 Y=616 Height= 3695713 Julian minutes = 3838086
Point 21: X=99 Y=655 Height= 3763617 Julian minutes = 3838146
Point 22: X=137 Y=616 Height= 3346802 Julian minutes = 3838226
Point 23: X=275 Y=304 Height= 2667000 Julian minutes = 3838

Time(s) Height(km)
0.0 4512875
-960.0 4537720
0.0 4512875
1200.0 4473947
3600.0 4410348
4800.0 4385596
6240.0 4336132
7200.0 4322231
8400.0 4281092
9840.0 4239992
12060.0 4185200
13440.0 4155133
14400.0 4130581
15600.0 4089698
17040.0 4054245
21600.0 3940567
22800.0 3911037
28800.0 3741292
30000.0 3712201
31440.0 4042331
36000.0 3695713
39600.0 3763617
44400.0 3346802
44400.0 2667000
44400.0 3349259
HT Slope = -26 km/s
HT Intercept = 4524675 km
HT Correlation coeff = -0.9
Apr 20 2002 07:44:49 Maciej Reszelski
macres@pro.onet.pl
Re: last raports

Dear all,
I slight don't understand last raports. I suppose that these was
created by automatic searching program. Raport from Mark looks
strange because X,Y not changin at all. About Silvia's last raport in the
first part looks like a star but then I see chotic X,Y changes.
Also time from these raports are hard to guess.
Best regards, Maciej
Apr 20 2002 08:17:24 Maik Meyer
maik@comethunter.de
First two reports by Mark:


this seems to be a stationary point, since the coordinates don't
change. Not very likely for a comet.

Second report by Silvia:

Most definitely a star, since Y does change only slightly.

General for newbees:
* Please do the reports like you can find it on this reports
page.
* Look for examples of comets in Dougs pages. Read these pages!
Look for common beginners faults. Another good address is
http://members.aol.com/sfhoenig/find.html
* Don't post large lists with positions. At least four (fulfilling
all criteria) but at maximum 10 should be enough.

Regards, Maik
Apr 20 2002 08:26:19 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi all,
Regarding the latest reports, which by the way were
created using the Java tool on the LASCO webpages.

The object reported by S. Alonso-Perez is a star. Stars are
visible in every single image. In normal operations, they are seen to move left to right. Stars are easy to spot when images
are viewed as a sequence or movie. There are many stars in each
image. Usually about 200 in C3 and about 10 in C2. Note, the
stars all move at the same speed and in the same direction.

For the report from M. Ledingham, the artifact here is just a CCD
defect. A bad pixel in the CCD which is dark. Note that it
doesn't move. Ever. The only real object in LASCO images that
shouldn't move is the Sun. And that's because we keep SOHO
centered on the Sun.

Please try to familiarize yourself with the data as much as
possible before submitting reports. And make sure you read the
common mistakes section of the "Found Something?" page.

That said, I always enjoy hearing from new folks on these pages.

Doug
Apr 20 2002 15:17:33 Mark Ledingham
mark-le@online.no
Hi everyone!


Thank you, Doug and Maik, for your excellent advice - and patience - in assisting newbies like me. The search for new comets and stargrazers is immensely exciting, but in puruit of these, I need to yield to greater learning of how exactly to do this. I have studied earlier reports hoping to be somewhat more cautious next time before sounding the alarm :) Thank you once again, and good hunting!

Best wishes from 70N,
Mark Ledingham
Apr 21 2002 15:18:58 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Due to a large solar flare on the solar west limb (which is
magnetically well connected to the Earth), a proton storm
is now evident in the LASCO and EIT images. Due to an unrelated
problem, not all movies are being updated at the moment. For the
uninitiated, this is the 'snow storm' in the LASCO images. It is
due to high energy protons accelerated during the solar event.
These particles are also known as solar cosmic rays, or sometimes
just cosmic rays. The more typical cosmic rays we see in the
LASCO images are galactic in origin.

Doug
Apr 22 2002 20:13:14 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Just a quick note to let you all know that the Java measuring

tool (the one there is a link to at the top of the Report Forms
page) now shows date and time in a more pleasant format. YYMMDD
HHMM

Doug
Apr 24 2002 17:40:33 Rainer Kracht
R.Kracht@t-online.de
Kreutz group comet in archival C2 images of 2000 Apr 26.


C2, 1024x1024, 0,0 upper left

22066622.fts 01:31 427,1001
22066623.fts 01:54 439, 984
22066624.fts 02:06 445, 976
22066625.fts 02:30 459, 956
22066626.fts 02:54 470, 938
22066627.fts 03:06 476, 930

with a short tail/elongated

Regards, Rainer
Apr 25 2002 09:02:28 Doug Biesecker
doug@sungrazer.nascom.nasa.go

Well,
Some interesting news from the SWAN instrument on SOHO.
They've discovered their second new comet, this one also in
archival data. The comet is designated C/2000 S5. Since we
(meaning me) include SWAN comets in the SOHO count, that makes it
SOHO-429. Further information is available in MPEC 2002 H41.
It was visible from September to November in 2000.

Also, I've been able to confirm R. Kracht's archive
Kreutz family comet in data from Apr 26, 2000 in LASCO C2. It's
fairly obvious, so I'm quite a bit surprised it was missed the
first time around. That is SOHO-430.

Regarding the contest for predicting the perihelion date
and time for SOHO-500. I'll think of a list of possible
prizes and let the winner choose from the list. One item on the
list will be the Solar Max video (available in several different
formats). It originally appeared as an IMAX movie in theaters
around the world. Note, the comets C/1998 K10 and K11 (the twins)
make an appearance.

More details about the contest soon. Entries should be
e-mailed directly to me at doug@sungrazer.nascom.nasa.gov

Doug
Apr 25 2002 13:50:20 Rainer Kracht
R.Kracht@t-online.de
Kreutz group comet in archival C2 images of 2000 Apr 28.


C2, 1024x1024, 0,0 upper left

22066805.fts 15:54 302,1015
22066806.fts 16:06 308,1007
22066807.fts 16:30 320, 993
22066808.fts 16:54 333, 977
22066809.fts 17:06 339, 970
22066810.fts 17:30 351, 955
...
22066816.fts 19:54 430, 851
22066817.fts 20:06 437, 842

another rather obvious comet with a short tail
slow moving

Regards, Rainer
Apr 26 2002 02:12:49 Maik Meyer
maik@comethunter.de
Kreutz sungrazer in C2 real-time images of 26/04/2002


1024x1024, 0,0 upper left

05:26 169, 1009
05:50 184, 994 (B/W extrapolated from 512x512)

More positions follow as images become available

Medium bright, short tail. Obvious comet.

Maik
Apr 26 2002 02:43:54 Maik Meyer
maik@comethunter.de
Kreutz sungrazer in C2 real-time images of 26/04/2002


UPDATE
1024x1024, 0,0 upper left

05:06 157, 1022 (edge of field)
05:26 169, 1009
05:50 184, 994 (B/W extrapolated from 512x512, hidden by date in processed frame)
06:06 194, 984 (B/W extrapolated from 512x512)
06:26 206, 970 (B/W extrapolated from 512x512)

Medium bright, short tail even obvious in enlarged B/W frames. Obvious comet. Seems to fade beginning with the 06:26 frame.

Maik
Apr 26 2002 08:23:46 XingMing Zhou
zh_x_m@163.net
Another possible Kreutz sungrazer comet in real-time c2 images now.

0,0 in upper left corner

Images Size X, Y

20020426_1026_c2.gif 512 x 512 297, 505
20020426_1050_c2.gif 512 x 512 301, 495
20020426_1106_c2.gif 512 x 512 305, 487


XingMing Zhou
Apr 26 2002 11:54:21 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Hi All,

I can report 2 confirmations and 1 definite maybe.
The confirmations are R. Kracht's archival comet in C2 from
2000/04/28 and M. Meyer's real-time report from this morning
in C2. The definite maybe is X.M. Zhou's report from today.
This one will require further deliberation. So we're now up
to SOHO-432. These two confirmed comets are definitely worth a
check of C3 data.

Rough positions below.
Doug

#COMMENT: COMET SOHO-431
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
6.62 2000/04/28 15:54:05 157.4 C2 10 302.0 7.0
6.50 2000/04/28 16:06:05 157.7 C2 10 309.0 15.0
6.27 2000/04/28 16:30:05 158.2 C2 10 320.0 31.0
6.05 2000/04/28 16:54:05 158.9 C2 10 332.0 46.0
5.93 2000/04/28 17:06:05 159.2 C2 10 338.0 54.0
5.69 2000/04/28 17:30:05 160.1 C2 10 352.0 70.0
5.46 2000/04/28 17:54:05 160.8 C2 10 364.0 86.0
5.35 2000/04/28 18:06:06 161.2 C2 10 370.0 94.0
5.10 2000/04/28 18:30:05 162.3 C2 10 384.0 111.0
4.85 2000/04/28 18:54:05 163.5 C2 10 398.0 128.0
4.49 2000/04/28 19:31:21 165.1 C2 10 416.0 154.0
4.23 2000/04/28 19:54:05 166.7 C2 10 431.0 172.0
4.12 2000/04/28 20:06:05 167.4 C2 10 437.0 180.0
3.86 2000/04/28 20:30:05 169.3 C2 10 452.0 199.0


#COMMENT: COMET SOHO-432
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
7.52 2002/04/26 05:06:06 145.3 C2 10 157.0 1.0
7.31 2002/04/26 05:26:05 145.6 C2 10 169.0 14.0
7.06 2002/04/26 05:50:05 145.9 C2 10 184.0 30.0
6.88 2002/04/26 06:06:05 146.1 C2 10 194.0 41.0
6.67 2002/04/26 06:26:05 146.3 C2 10 206.0 54.0
6.39 2002/04/26 06:50:05 146.6 C2 10 221.0 72.0
5.97 2002/04/26 07:27:18 147.3 C2 10 246.0 98.0
5.71 2002/04/26 07:50:05 147.8 C2 10 261.0 114.0
5.52 2002/04/26 08:06:06 148.0 C2 10 271.0 126.0
5.28 2002/04/26 08:26:06 148.5 C2 10 285.0 141.0
4.98 2002/04/26 08:50:05 149.0 C2 10 301.0 160.0
4.79 2002/04/26 09:06:05 149.5 C2 10 312.0 172.0
4.53 2002/04/26 09:26:05 150.2 C2 10 327.0 188.0
4.22 2002/04/26 09:50:05 151.1 C2 10 344.0 207.0


Still in doubt:
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
6.10 2002/04/26 10:26:05 190.0 C2 10 595.0 14.0
5.88 2002/04/26 10:50:05 191.6 C2 10 605.0 35.0
5.73 2002/04/26 11:06:05 192.8 C2 10 612.0 49.0
Apr 26 2002 12:48:22 Rainer Kracht
R.Kracht@t-online.de
Meyer group comet in archival C2 images of 2000 May 06.


C2, 1024x1024, 0,0 upper left

22067313.fts 05:26 128, 323
22067314.fts 05:50 128, 298
22067315.fts 06:06 129, 281
22067316.fts 06:26 129, 261
22067317.fts 06:50 131, 236
22067318.fts 07:27 135, 199
...
22067328.fts 10:26 170, 36
22067329.fts 10:50 178, 17

small comet, first brightening, then fading
short tail 08:26 UTC

Regards, Rainer
Apr 26 2002 13:15:36 Scarmato Toni
toniscarmato@libero.it
Possible comet in C3


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


26/04/2002

16:18 (446,633)
16:42 (450,624)


I am waiting other images to confirm


Regards,

Toni Scarmato
Apr 26 2002 13:37:51 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20020426_1442 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
--------------------------------------------
20020426_1442.gif 512 x 512 135, 386
20020426_1518.gif 512 x 512 136, 385
20020426_1542.gif 512 x 512 138, 384
20020426_1618.gif 512 x 512 139, 384

----------------
Michael Boschat
Apr 26 2002 16:51:30 Kazimieras Cernis
cernis@itpa.lt
Possible faint object in C3 real time images now.

0,0 in bottom left corner in 1024x1024.

DATE TIME TEL COL ROW
2002/04/26 16:18 C3 231 299
2002/04/26 16:42 C3 234 302
2002/04/26 17:42 C3 240 308

I am sorry I can not confirm next images.

Kazimieras Cernis
Apr 27 2002 12:03:00 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20020427_1142 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
--------------------------------------------
20020427_1142.gif 512 x 512 145, 365
20020427_1218.gif 512 x 512 149, 361
20020427_1242.gif 512 x 512 152, 359
20020427_1338.gif 512 x 512 155, 357

----------------
Michael Boschat
Apr 27 2002 15:07:37 michael boschat
aa063@chebucto.ns.ca
DISREGARD MY 2 POSTS OF:


Apr 26 2002 13:37:51
Apr 27 2002 12:03:00

New images show nothing.

M.B.
Apr 27 2002 17:02:55 Xavier Leprette
xavier.leprette@education.gouv.fr
Possible sungrazer comet in a real-time C2 images now 


It is visible on 2002/04/27 from 15:50 to 16:06 UT in 2 consecutive frames only.
The object is faint, with a short tail and it is moving towards the sun.

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

col,row
15:50 301,493
16:06 307,481

I'm waiting other images to confirm my report.

Xavier Leprette
Apr 27 2002 17:15:28 Xavier Leprette
xavier.leprette@education.gouv.fr
I'm sorry I cannot confirm my previous report. Only noise on

1024 images.

Xavier Leprette
Apr 27 2002 21:05:26 Martin Freeman
bmjr77a@att.net
Come is on the c2 between the 7:00 and 8:00 positon close to the center of the frame 
Apr 28 2002 08:45:17 Rainer Kracht
R.Kracht@t-online.de
Meyer group comet in archival C2 images of 2000 July 04.


C2, 1024x1024, 0,0 upper left

22071831.fts 15:50 669, 197
22071832.fts 16:06 655, 182
22071833.fts 16:26 639, 165
22071834.fts 16:50 618, 144
22071835.fts 17:06 605, 130
22071836.fts 17:26 588, 113

faint object on the track of the Meyer group comets
visible in six images only

Regards, Rainer
Apr 28 2002 11:36:02 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
20020428 1406 94 1020
20020428 1426 108 1004
20020428 1506 136 976

Regards, Rainer
Apr 28 2002 11:55:40 Rainer Kracht
R.Kracht@t-online.de
Sorry, my last message from Apr 28 2002 11:36:02 was noise.


Regards, Rainer
Apr 29 2002 06:07:23 Alexei Pace
apATonvol.net
Possible comet in C2 images 


0,0 in lower left corner

C2 IMAGES

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20020429_0650_c2.gif 1024 x 1024 960, 425
20020429_0727_c2.gif 1024 x 1024 933, 434
20020429_0750_c2.gif 1024 x 1024 914, 448
20020429_0806_c2.gif 1024 x 1024 889, 469
----------------
Alexei Pace
MALTA
Apr 29 2002 06:18:35 Alexei Pace
apATonvol.net
Sorry-disregard my previous post. 0850 image shows nothing :(

looked so real...
AP
Apr 29 2002 10:08:20 Lela Wilson
lalalitigger@msn.com
It has like a greenish tail an was moving fast
Apr 29 2002 18:24:29 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20020429_1942 UT
Below occulting disk.
****** NOTE ******
x-coordinates are probably correct,
but y-coordinates may be off by
several pixels.0,477 in lower left corner
LASCO C3 IMAGES size coordinates
20020429_1942.gif 512 x 512 226, 265
20020429_2018.gif 512 x 512 229, 263
20020429_2042.gif 512 x 512 232, 261


Michael Boschat
Apr 29 2002 21:52:12 michael boschat
aa063@chebucto.ns.ca
Disregard my post of Apr 29 2002 18:24:29


download 1024 but nothing seen. Probale
noise.

MB
Apr 29 2002 21:52:22 michael boschat
aa063@chebucto.ns.ca
Disregard my post of Apr 29 2002 18:24:29


downloaded 1024 images but nothing seen.
Probale noise.

MB
Apr 30 2002 09:39:12 Scarmato Toni
toniscarmato@libero.it
Possible non-Kreutz comet visible in C3


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

30/04/2002

10:42 (778,590)
11:18 (776,588)
11:42 (774,587)


I am waiting other images to confirm


Regards,

Toni Scarmato
Apr 30 2002 10:51:54 Scarmato Toni
toniscarmato@libero.it
Regarding my last report nothing seem

visible at 12:18 and 12:42.

Probably noise.

Regards,

Toni Scarmato