SOHO-LASCO Comet Reports for 200107

Jul 02 2001 12:57:23 Scarmato Toni
toniscarmato@libero.it
Possible comet visible in 4 consecutive C3 images:


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


2001/07/02 14:18 (389,371)
2001/07/02 14:42 (387,369)
2001/07/02 15:18 (385,366)
2001/07/02 15:42 (383,364)


Comment: point of ligth moving toward the sun on the
Kreutz path.


Regards,

Toni Scarmato
Jul 02 2001 13:32:58 Scarmato Toni
toniscarmato@libero.it
Sorry!


I did an error.
Correct positions regarding my last report.


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


2001/07/02 14:18 (375,361)
2001/07/02 14:42 (375,359)
2001/07/02 15:18 (375,356)
2001/07/02 15:42 (375,354)
2001/07/02 16:18 (374,349)

Regards,

Toni Scarmato
Jul 02 2001 14:11:28 Sebastian Hoenig
sfhoenig@aol.com
Toni,


Sorry but I can't confirm your report. No cometary object visible
at the indicated positions in 1024 images.

Regards, Sebastian
Jul 02 2001 15:32:28 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C2 images - 20010702_1830 UT


Waiting for 2 more images.

Coordinates next post.

Michael Boschat
Jul 02 2001 16:32:07 Xavier Leprette
xavier.leprette@education.gouv.fr
Possible sungrazer comet in a real-time C2 images now 


It is visible on 2001/07/02 from 18:54 to 19:31 UT in 2 consecutive frames, at bottom right quadrant, on the right of the logo.
The object is faint, fuzzy, with a short tail and it is moving towards the sun.

Approximate positions measured from the top-left corner of 512x512 frames :
col, row
18:54 UT 494,469
19:31 UT 493,462

I'm waiting other images to confirm my report.
Coordinates in a next e-mail.

Xavier Leprette
Jul 02 2001 16:56:28 Xavier Leprette
xavier.leprette@education.gouv.fr
About my previous mail :

I'm sorry, it was not a good report. Forget it. It was only noise.

Xavier Leprette
Jul 05 2001 00:32:30 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010705_0142 UT


A tough one to see in 512 for me anyways.
It's between the 2 "dark spots" to right
of disk 1/4 way down.

( )disk
* spot 1
x --- object
* spot 2

****** 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
--------------------------------------------
20010705_0142.gif 512 x 512 365, 291
20010705_0218.gif 512 x 512 362, 290
20010705_0242.gif 512 x 512 359, 288
20010705_0318.gif 512 x 512 357, 286
20010705_0342.gif 512 x 512 354, 284
----------------
Michael Boschat
Jul 05 2001 14:41:02 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Hi Everyone,

Sorry I haven't been posting things for a while. You've
been doing a pretty good job of controlling yourselves, so I've
seen no need to intervene. We have one outstanding post we're
still considering, but as you may know, we've pretty much kept
a handle on all of your reports. About the latest claim by M.
Boschat, there is nothing in subsequent images, so I don't think
there is anything real at the positions indicated.

I'm keeping busy with other things, so I'll probably keep
my posts to a minimum for at least a little while.

Doug
Jul 06 2001 08:59:33 Xavier Leprette
xavier.leprette@education.gouv.fr
A possible sungrazer comet in a real-time C2 images now.


The object is fairly brigt, without tail and it is visible in 5 consecutive images
on 2001/07/06 from 00:06 to 01:54 UT in bottom right quadrant.
The object is moving towards the sun.

I'm waiting others images to confirm my report and give some positions.

Xavier Leprette
Jul 06 2001 09:05:46 Xavier Leprette
xavier.leprette@education.gouv.fr
A possible sungrazer comet in a real-time C2 images now.

UPDATE : with one first position

The object is fairly bright, without tail and it is visible in 5 consecutive images
on 2001/07/06 from 00:06 to 01:54 UT in bottom right quadrant.
The object is moving towards the sun.

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

col, row
00:06 UT 804,835

Xavier Leprette
Jul 06 2001 09:10:04 Michael Oates
mike@ph.u-net.com
Confirmation of report by Xavier Leprette


This is indeed a comet, I was also about to report it.
It can be seen in C2 images from:
20010705_2130_c2.gif

Michael Oates
Jul 06 2001 09:28:11 Xavier Leprette
xavier.leprette@education.gouv.fr
A possible sungrazer comet in a real-time C2 images now.


I can confirm my two previous reports.

The object is fairly brigth, without tail and it is visible in 12 consecutive images
on 2001/07/05 from 21:30 UT to 2001/07/06 02:06 UT in bottom right quadrant.

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

col, row
21:30 UT 880,980
21:54 UT 867,957
22:06 UT 863,947
22:30 UT 852,924
23:30 UT 823,870
20:54 UT 810,846
00:06 UT 804,835
00:30 UT 792,811
00:54 UT 779,788
01:31 UT 758,750
01:54 UT 745,728
02:06 UT 739,715

Xavier Leprette
Jul 06 2001 11:34:36 Scarmato Toni
toniscarmato@libero.it
Possible comet in real-time C2 starting at position:



512x512 (0,0) top-left corner


2001/07/06 13:31 (509,375)


Visible in 4 consecutive images.

Other positions at next post


Regards,

Toni Scarmato
Jul 06 2001 11:49:49 Scarmato Toni
toniscarmato@libero.it
Update last post:



2001/07/06 13:54 (504,363)
2001/07/06 14:06 (503,355)
2001/07/06 14:30 (496,345)


Comment:

The object seem fading too fast moving toward the sun.

Toni


Jul 06 2001 12:32:59 John Phillips
john.d.phillips@home.com
Possible comet in LASCO C3 images


Date: Jul 05, 2001 Images

Brief description:
Bright, easily seen object moving faster than the star field
no tail visible
May be a confirmation of Xavier's report

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

Time (x,y)

18:18 859.4,182.4
18:42 860.5,182.2
19:42 863.5,181.7
20:18 865.0,181.5
20:42 866.1,181.5

Regards,

John Phillips
Jul 06 2001 13:19:12 Xavier Leprette
xavier.leprette@education.gouv.fr
About the C2 sungrazer reported today at 9:28:11 (and previously):


Perhaps the object is also visible in two C3 images, just before
it comes in the bright solar streamer. But I'm not sure that it is
really the comet.
Approximate positions measured from the top-left corner
of a 1024x1024 frames :
col, row
2001/07/05 20:18 UT 604,572
2001/07/05 20:42 UT 603,567

Xavier Leprette

Jul 07 2001 04:15:38 Scarmato Toni
toniscarmato@libero.it
Possible comet visible in C3 e C2.



Positions in C3 512x512 (0,0) top-left corner:

2001/07/07 05:42 (317,263)
2001/07/07 06:18 (316,261)
2001/07/07 06:42 (315,259)


Positions in C2 512x512 (0,0) top-left corner:

2001/07/07 06:30 (510,337)
2001/07/07 06:54 (495,333)



Comment: the object seem visible in 3 images C3, but in C2 is
not visible at 07:31.



Regards,

Toni Scarmato
Jul 07 2001 11:18:21 John Phillips
john.d.phillips@home.com
The object reported on Jul 06 2001 12:32:59 is one star in a

double or multiple system. It is SAO 78540, not a comet.

Retracted!

Regards,

John Phillips
Jul 07 2001 16:27:08 steven daversa
slsa@quik.com
I am new to this so I am not sure as to whatI found. I was scanning one of the LASCO images and saw a streak in it. It is at LASCO EIT 195. The time was 2001 07 07 19:36.   The streak in question is on the right side of the image center, just touching the sun.                
Jul 09 2001 06:06:00 Scarmato Toni
toniscarmato@libero.it
Possible new comet in real-time C3 images

visible in 5 consecutive images:

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


2001/07/09 06:18 (434,388)
2001/07/09 06:42 (432,385)
2001/07/09 07:42 (430,380)
2001/07/09 08:18 (430,378)
2001/07/09 08:42 (430,376)

Comment: the object is too far from the sun.
If it is a real object will be a brigth comet
I am waiting other images to confirm.

Regards,

Toni Scarmato
Jul 09 2001 07:56:37 Sebastian Hoenig
sfhoenig@aol.com
I cannot confirm Toni's reports of July 7 (C2 and C3) and July 9

(C3).

Regards, Sebastian
Jul 09 2001 08:38:03 Scarmato Toni
toniscarmato@libero.it
Regarding my last report the object is not visible at

2001/07/09 09:18 and 09:42.


Regards,

Toni
Jul 09 2001 09:53:29 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Since my last post, I have been able to confirm only one of the
reports. That of X. Leprette of a C2 comet visible July 5-6, 2001.
I am not so sure that the comet was seen in C3. Another look at
the C3 data is necessary. Rough positions of this comet are given
below. I have examined all of the other claims and can confirm
none of them.

Doug

# HEIGHT DATE TIME ANGLE TEL FC COL ROW
7.27 2001/07/05 21:30:08 218.7 C2 10 880.0 46.0
6.98 2001/07/05 21:54:05 219.0 C2 10 868.0 67.0
6.86 2001/07/05 22:06:05 219.4 C2 10 864.0 77.0
6.55 2001/07/05 22:30:05 219.8 C2 10 851.0 99.0
5.83 2001/07/05 23:30:05 221.3 C2 10 822.0 153.0
5.53 2001/07/05 23:54:05 222.4 C2 10 812.0 177.0
5.35 2001/07/06 00:06:05 222.7 C2 10 804.0 189.0
5.02 2001/07/06 00:30:05 223.5 C2 10 790.0 213.0
4.72 2001/07/06 00:54:05 224.7 C2 10 779.0 236.0
4.20 2001/07/06 01:31:48 226.6 C2 10 757.0 274.0
3.90 2001/07/06 01:54:07 227.9 C2 10 744.0 296.0
3.73 2001/07/06 02:06:31 229.1 C2 10 738.0 310.0
Jul 09 2001 22:08:03 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010709_2142 UT


This one is unsual to me,
it's on 4 images but moving away from the
Sun on the right side near teh 3 pm position, n
near the 3 pm solar streamer. It looks like a star
but I can't see it on the following images
after 0006 UT.

Figure I post this in case...


****** 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
--------------------------------------------
20010709_2142.gif 512 x 512 315, 212
20010709_2218.gif 512 x 512 317, 211
20010709_2318.gif 512 x 512 316, 211
20010709_2342.gif 512 x 512 318, 211

----------------
Michael Boschat
Jul 10 2001 04:31:21 Alexander Mimeev
alexpm@imail.ru
Two possible fragments /moving on a Kreutz orbit /it is very faint

and visible in 6 consecutive images on 20010619

0630 906 26
0654 902 41
0731 896 65
0754 892 80
0806 890 87
0830 886 103
very faint

0954 904 10
1006 902 18
1031 899 36
1106 894 60
1130 890 77
1154 886 94
very faint

all C2 1024 top-left

Alexander Mimeev
Jul 11 2001 09:07:54 Scarmato Toni
toniscarmato@libero.it
Possible comet in real-time C3 images.


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


2001/07/11 10:20 (425,356)
2001/07/11 10:42 (424,355)
2001/07/11 11:18 (422,353)
2001/07/11 11:42 (423,352)


Comment: the object is well visible in 4 consecutive
images and move toward the sun on a Kreutz orbit.

I am waiting other images to confirm.

Regards,

Toni Scarmato
Jul 11 2001 11:21:19 Scarmato Toni
toniscarmato@libero.it
Regarding my last report, I Have download the 1024 pixels

images to verify.

I saw two obejcts that move on the same orbit.

Positions of the first object 1024x1024 (0,0) top-left corner
(this is the same reported in my last post)

2001/07/11 10:20 (844,712)
2001/07/11 10:42 (843,714)
2001/07/11 11:18 (842,710)
2001/07/11 11:42 (841,708)


positions of the second object

2001/07/11 10:20 (828,698)
2001/07/11 10:42 (827,697)
2001/07/11 11:18 (825,694)
2001/07/11 11:42 (823,692)


Comment:

The two object are not much brigth but seem above the noise.

Regards,

Toni Scarmato



Jul 11 2001 12:07:59 Sebastian Hoenig
sfhoenig@aol.com
I cannot confirm Toni's reports of today. I also looked at 

Alexander's first claim but could not see anything in the images.
The second one still needs to be checked.

Regards, Sebastian
Jul 11 2001 17:37:05 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Hi everyone,

I am now officially caught up with all of the reports.
Firstly, I am unable to confirm any of the claims made since my
last post. Secondly, upon further review, I have finally accepted
a claim by M. Oates for a comet in C2 on June 27, 2001. This one
is SOHO-339.

# HEIGHT DATE TIME ANGLE TEL FC COL ROW
7.50 2001/06/27 06:06:05 236.5 C2 10 507.00 170.00
7.31 2001/06/27 06:30:05 237.4 C2 10 499.00 186.00
7.12 2001/06/27 06:54:05 238.0 C2 10 489.00 200.00
6.83 2001/06/27 07:31:52 239.6 C2 10 476.00 226.00
6.63 2001/06/27 07:54:05 240.6 C2 10 467.00 242.00
6.55 2001/06/27 08:06:05 240.9 C2 10 462.00 248.00

That makes the comet find by X. Leprette from
July 5-6, 2001 SOHO-340.

Doug

Jul 14 2001 07:39:16 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C2 images - 20010714_0954 UT


Object to left of Lasco logo.
Waiting for 2 more images to be
sure.

Michael Boschat
Jul 14 2001 07:39:44 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C2 images - 20010714_0954 UT


Object near left of Lasco logo.
Waiting for 2 more images to be
sure.

Michael Boschat
Jul 14 2001 07:49:17 michael boschat
aa063@chebucto.ns.ca
Object of last post 20010714_0954 UT

was "noise"!

Mike Boschat
Jul 16 2001 11:38:43 Sebastian Hoenig
sfhoenig@aol.com
Possible comet in LASCO C3 b/w images, 20010716_1118_c3.gif


Date: July 16, 2001

Description: dot moving towards the sun, in 3 b/w images so far

Postions extraploated from b/w by substracting 50 pix from y-pos
to get regular 512x512 positions, 0,0 upper left

Time x,y

11:18 335,296
11:42 334,294
12:18 332,292

More on this soon.

Sebastian Hoenig
Jul 16 2001 11:48:41 michael boschat
aa063@chebucto.ns.ca
I can see Sebastian's object, it's a bright

dot by the 2 squares on the 2 images I have.
Moving like a comet...congrats?

Mike Boschat
Jul 16 2001 13:12:44 Sebastian Hoenig
sfhoenig@aol.com
Seems to be a real comet.


It just entered C2 FOV in the image of 17:06 UT.

Position: (0,0) upper left, 512x512 (extrapolated from b/w)

Time x,y

16:54 511,394 ? at the very right edge
17:06 508,389 hint of a tail

I also detected it in C3 b/w images of 14:42, 15:42, 16:18(fading)

Regards, Sebastian
Jul 16 2001 14:54:57 Sebastian Hoenig
sfhoenig@aol.com
Update of the last two reports for the new comet in C2 and C3


I could definitely identify it as a comet. It is visible in at
least the C3 images of 11:18, 11:42, 12:18, 14:42 and 15:42 plus
the images of 17:06 and 17:30 in C2. The comet faded very quickly
in C2 and might only be visible one or 2 more C2 images. The 1024
image of 17:06 shows a diffuse comet with a hint of a tail.

I do not give more positions as that won't help Doug. Those I gave
yet identify it clear.

Regards, Sebastian
Jul 16 2001 16:33:57 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
I can definitely confirm S. Hoenig's claim from July 16.  The

comet is visible in both C3 and C2 images. I have approximate
positions listed below. If I'm not mistaken, this'll be SOHO-341.
I'm not certain of all of these observations yet and there may also
be a few additional observations added to the list.

Doug

# HEIGHT DATE TIME ANGLE TEL FC COL ROW
13.31 2001/07/16 05:42:05 233.7 C3 10 702.0 395.0
13.07 2001/07/16 06:18:05 233.9 C3 10 699.0 398.0
12.87 2001/07/16 06:42:05 234.2 C3 10 697.0 401.0
12.41 2001/07/16 07:42:05 234.3 C3 10 691.0 406.0
12.13 2001/07/16 08:18:05 234.7 C3 10 688.0 410.0
11.86 2001/07/16 08:42:05 235.2 C3 10 685.0 414.0
11.66 2001/07/16 09:18:05 235.5 C3 10 683.0 417.0
11.38 2001/07/16 09:42:05 236.0 C3 10 680.0 421.0
11.19 2001/07/16 10:20:03 236.4 C3 10 678.0 424.0
10.87 2001/07/16 10:42:05 236.7 C3 10 674.0 428.0
10.62 2001/07/16 11:18:05 237.0 C3 10 671.0 431.0
10.43 2001/07/16 11:42:05 237.5 C3 10 669.0 434.0
10.11 2001/07/16 12:18:05 237.9 C3 10 665.0 438.0
8.66 2001/07/16 14:42:05 240.9 C3 10 648.0 458.0
7.98 2001/07/16 15:42:05 241.9 C3 10 639.0 466.0

7.01 2001/07/16 17:06:06 242.8 C2 11 1016.0 245.0
Jul 16 2001 23:48:23 David Johnson
dej257@worldnet.att.net
There's a very faint (just above the noise level) object seen 

moving in a retrograde motion in the following images. It's very
diffuse, so exact pixel locations are or may be off by a few pixels.
The object is best seen with a viewing of the images moving in
rapid succession, and it's moving toward the left, away from the
middle star in the bottom half of the frames, that is in a
crooked line of 3 bright stars.

C3 telescope, 1024x1024 (0,0 in upper left corner):

20010717_0242_c3.gif - 560,723
20010717_0218_c3.gif - 566,724
20010717_0142_c3.gif - 570,723
20010717_0042_c3.gif - 573,721
20010717_0018_c3.gif - 577,722
20010716_2342_c3.gif - 580,722

David E. Johnson
Jul 17 2001 05:54:40 Scarmato Toni
toniscarmato@libero.it
Possible comet visible in 4 consecutive C2 images



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


2001/07/17 07:54 (451,410)
2001/07/17 08:06 (447,396)
2001/07/17 08:30 (439,374)
2001/07/17 08:54 (431,354)


Comment: object moving on a Keutz orbit.

Regards,

Toni Scarmato
Jul 17 2001 06:12:19 Scarmato Toni
toniscarmato@libero.it
Possible comet in 4 consecuitve real-time C3 images.


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


2001/07/17 07:42 (419,337)
2001/07/17 08:18 (415,334)
2001/07/17 08:42 (413,332)
2001/07/17 09:18 (409,328)


Comment: I am waiting other images to confirm.


Regards,

Toni Scarmato
Jul 17 2001 07:14:33 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010717_0818 UT


I see an object below the
dark "speck" moving to
the Sun. Have no
idea were Toni is reporting
can't match his XY's so I;ll
report this:

****** 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
--------------------------------------------
20010717_0818.gif 512 x 512 347, 263
20010717_0842.gif 512 x 512 345, 261
20010717_0918.gif 512 x 512 343, 260
20010717_0942.gif 512 x 512 340, 256

Michael Boschat
Jul 17 2001 07:50:20 Sebastian Hoenig
sfhoenig@aol.com
Regarding the last three posts:


I cannot confirm any of the recent claims in C2 and C3.

Regards, Sebastian
Jul 17 2001 08:26:50 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
Hi all,

I've checked the claims from July 16-17 and an unable to
confirm any of them. I may do some further checking on some of them,
particularly the claim by D. Johnson.

Just a bit of advice for everyone. We're entering a period
of time when the C3 telescope is the best option for finding
sungrazing comets.

Doug
Jul 18 2001 08:03:13 Davydov Yurij
yraary@mail.ru
Very faint in 4 cons. image 

20010614 1024 bottom-left c2

0154 858 7
0206 857 15
0230 856 29
0308 854 53
0330 (853 67)
Yurij
Jul 18 2001 10:31:42 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
I have checked the report of Yurij for an archive claim on

June 14, 2001. While the first 3 data points seem somewhat
reasonable, the last two are very speculative. I don't see
anything convincing to cause me to think there is a comet there.

Doug
Jul 18 2001 10:59:32 Scarmato Toni
toniscarmato@libero.it
Possible comet in C3 real-time image


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


2001/07/18 11:42 (429,325)
2001/07/18 12:18 (427,323)
2001/07/18 12:42 (426,321)
2001/07/18 13:42 (422,318)


Comment: point of light moving toward the sun and increasing
his brigthness in reliable way.


Regards,

Toni Scarmato
Jul 18 2001 11:38:01 Sebastian Hoenig
sfhoenig@aol.com
Sorry Toni, but I cannot verify your object. I looked at some of

the images but in the first one(s) nothing above noise level and
it vanishes suddenly in the 14:42 image.

Regards, Sebastian
Jul 18 2001 11:56:35 Scarmato Toni
toniscarmato@libero.it
Regarding my last report I see another brigth point at

position 2001/07/18 14:42 (413,314).

The shift respect the previous point seem too long, also if the orbit is in agreement.


Regards,

Toni
Jul 18 2001 12:03:39 Scarmato Toni
toniscarmato@libero.it
No real object in my last reports.

Not visible at 15:18.


Regards,

Toni
Jul 18 2001 16:16:37 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010718_1818 UT


Coordinates next post.

Have to greysacle to get XY's
and I think SOHO images maybe having
problems with their density.

Michael Boschat
Jul 18 2001 16:55:30 michael boschat
aa063@chebucto.ns.ca
Because the 1942 & 2018 UT images

will be longer coming in I'm posting
these 2 XY's now. So if anyone has
1024 images they can see what I'm
looking at and give an educated guess.

****** 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
--------------------------------------------
20010718_1818.gif 512 x 512 339, 307
20010718_1842.gif 512 x 512 339, 305

----------------
thanks...
Michael Boschat
Jul 19 2001 16:29:49 michael boschat
aa063@chebucto.ns.ca
Disregard my post of Jul 18 2001 16:55:30

after further images came in and thanks
to Sebastian's help it was determined
to be as usual "noise".

Mike B.
Jul 19 2001 17:14:55 Melvin Bundy
mrferengi@yahoo.com
Possible Sungrazer comet in LASCO C2 Images


19 July 01, 1409 hrs,PST

First attemt,hope I'm not wasting your time.

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

2001/07/19/0230 705,304
2001/07/19/0254 487,332
2001/07/19/0306 305,361
2001/07/19/0330 39,449

Regards

Mel
Jul 20 2001 08:48:46 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi everyone,
I've checked the report by Mel and it appears to be a
classic case of an arrangement of cosmic rays. There are 3 main
points to this one:

1) In the first observation, in particular, the object appears
distinctly different in shape than it does in the other images.

2) The apparent motion is variable. While the change in
y-coordinates is pretty smooth, the change in x-coordinates is not.

3) Most importantly, the apparent distance between points is
extremely large. Given the high cadence, this translates to
a motion faster than 10 pixels/minute. We've never seen anything
that fast. But also, once you start including a larger area,
the false positives will go up, as you have more options of
finding some intriguing arrangement of cosmic rays.

Finally, as long as you learn from each experience, you are not
wasting time. In fact, the more 'eyes' looking at the data the
better.

Doug
Jul 21 2001 11:05:12 Gorelli Roberto
md6648@mclink.it

Comet in Kreutz orbit, date 1996 January 14th

from images C 3 (256 x 128)

horizontal 256 (from left to right) X

vertical 128 (from high to low) Y

T.U. X Y

1996 January 14 01 H 37 M 47 124

1996 January 14 01 H 55 M 48 123

1996 January 14 02 H 09 M 49 121

1996 January 14 02 H 22 M 50 120

1996 January 14 02 H 44 M 51-52 119

1996 January 14 03 H 27 M 55 116

1996 January 14 03 H 56 M 57 113

1996 January 14 04 H 39 M 60 110

1996 January 14 05 H 01 M 61 108

1996 January 14 05 H 19 M 63 107

1996 January 14 05 H 27 M 63 106

1996 January 14 06 H 15 M 67 102

There are around 110 images with the comet.
The comet can to be see in the middle of a
cloud of cosmic rays in mpeg of 1996 January
14th (4 Megabit). The positional data can to
wrong of a pixel in horizontal and in vertical
because they are toke from unusual images of
mpeg.

Roberto Gorelli
Jul 22 2001 07:43:59 Col.J.E.S. Singh
jessra@sancharnet.in
Possible sungrazer  2001 07 20 C3 512X512 (0,0) Top-left corner


Small faint dot becoming brighter

X,Y (Pixels)

0818 474,119
0842 469,122
0918 464,127
0942 460,130

Regards
Enoch Singh

Jul 23 2001 00:37:00 Mimeev Alexander
alexpm@imail.ru

20010614 c2 bottom-left 1024 very-very faint and diffuse
1706 869 3
1730 866 20
1754 862 36
1806 860 44
1830 855 59
... 851 75
Alexander
Jul 23 2001 10:31:53 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Well, what a surprise. Yes, I can confirm R. Gorelli's find
of a comet in data from back in January 14, 1996. At the time
we were still checking things out, and we were taking the C3
images through the Orange filter, which of course, we now do
only once or twice per day. I've put the measurements for this
comet below. Note, I'm only posting the measurements for about
every 4th observation.

As for the other claims from the weekend, I can't confirm them.
The E. Singh claim varies in shape and brightens rapidly, but
then disappears suddenly. Not very cometary. The A. Mimeev claim
just seems to be random stuff at the level of the noise.

Doug

#COMMENT: COMET SOHO-342
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
12.02 1996/01/14 01:10:42 126.1 C3 10 88.0 3.0
11.89 1996/01/14 01:21:12 126.2 C3 10 90.0 4.0
11.70 1996/01/14 01:31:57 125.8 C3 10 92.0 7.0
11.67 1996/01/14 01:42:43 125.6 C3 10 92.0 8.0
11.51 1996/01/14 01:53:13 125.5 C3 10 94.0 10.0
11.38 1996/01/14 02:04:02 125.6 C3 10 96.0 11.0
11.23 1996/01/14 02:14:49 125.5 C3 10 98.0 13.0
11.15 1996/01/14 02:25:17 125.4 C3 10 99.0 14.0
10.88 1996/01/14 02:52:19 124.9 C3 10 102.0 18.0
10.77 1996/01/14 03:03:07 124.6 C3 10 103.0 20.0
10.61 1996/01/14 03:13:49 124.5 C3 10 105.0 22.0
10.53 1996/01/14 03:24:37 124.4 C3 10 106.0 23.0
10.42 1996/01/14 03:34:48 124.1 C3 10 107.0 25.0
10.25 1996/01/14 03:45:36 124.3 C3 10 110.0 26.0
10.14 1996/01/14 03:56:24 124.0 C3 10 111.0 28.0
10.03 1996/01/14 04:07:15 123.6 C3 10 112.0 30.0
9.88 1996/01/14 04:17:50 123.4 C3 10 114.0 32.0
9.72 1996/01/14 04:29:02 123.3 C3 10 116.0 34.0
9.64 1996/01/14 04:39:25 123.2 C3 10 117.0 35.0
9.49 1996/01/14 04:50:16 123.0 C3 10 119.0 37.0
9.45 1996/01/14 05:01:06 122.7 C3 10 119.0 38.0
9.30 1996/01/14 05:11:32 122.5 C3 10 121.0 40.0
9.14 1996/01/14 05:22:21 122.3 C3 10 123.0 42.0
8.99 1996/01/14 05:33:05 122.0 C3 10 125.0 44.0
8.76 1996/01/14 05:48:46 121.7 C3 10 128.0 47.0
8.60 1996/01/14 05:59:35 121.4 C3 10 130.0 49.0
8.51 1996/01/14 06:10:26 120.5 C3 10 130.0 52.0
Jul 23 2001 11:16:24 Scarmato Toni
toniscarmato@libero.it
Possible sungrazer in C3 e C2 real-time images


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

2001/07/23 10:32 (303,278)
2001/07/23 11:15 (302,270)
2001/07/23 11:42 (301,267)


C2 position 512x512 (0,0) top-left corner

2001/07/23 11:08 (510,451)
2001/07/23 11:31 (509,428)


Regards,

Toni Scarmato
Jul 23 2001 14:19:25 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
First, I want to let you know that the large data gap early on

July 23rd is real and will not be filled in. We had difficulties
with the EIT instrument overnight and recovery from the problem
took longer than expected.

As for the T. Scarmato claim for July 23rd. The indicated points
are definitely not cometary. The C2 data points vary considerably
in shape and the C3 data points indicated are within the highly
vignetted part of the field and any object visible there would
be very bright.

Doug
Jul 23 2001 19:19:58 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010723_2018 UT


Coordinates next post after
I greyscale to get better
quality

Michael Boschat
Jul 23 2001 19:28:11 michael boschat
aa063@chebucto.ns.ca
Object is nearing a star by the dark

spot to the left 1/4 way down from
occultating 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

Date & UT Size X and Y
of Images used Coordinates
--------------------------------------------
20010723_2018.gif 512 x 512 353, 280
20010723_2042.gif 512 x 512 352, 279
20010723_2118.gif 512 x 512 351, 277
20010723_2142.gif 512 x 512 349, 276

-----
Michael Boschat
Jul 23 2001 19:32:23 michael boschat
aa063@chebucto.ns.ca
Correction to my last post,

should be the dark spot to the RIGHT
not the left... i had to rotate the
images,,got left /right reversed!

( ) disk

* dark spot
star .
* object
Mike Boschat
Jul 24 2001 10:18:09 Scarmato Toni
toniscarmato@libero.it
Possible comet peraphs not Kreutz visible in 5 consecutive 

C3 images


Positions 512x512 (0,0) top-leftc corner


2001/07/24 10:42 (316,309)
2001/07/24 11:18 (313,307)
2001/07/24 11:42 (311,305)
2001/07/24 12:18 (308,303)
2001/07/24 12:42 (304,301)

Comment: I am waiting other images to confirm



Regards,

Toni Scarmato
Jul 25 2001 12:07:13 michael boschat
aa063@chebucto.ns.ca
Possible comet in C3 @ 20010725_0942 UT
Our computers are crashing so no images
can be sent, I'm relying on these XY's for now.
Object on right side of pylon near the 1st streamer.
ALL IMAGES 512 pixels...may be off by several pixels.
ALL IMAGES ARE C3
0942 141,306
1020 142,303
1042 144,303
1118 145,303
1142 146,300

Mike Boschat
Jul 25 2001 18:21:24 Rob Matson
matsonr@saic.com
Possible comet in C3 beginning 20010725_1942 UT.  Awaiting

further images to confirm. Vertical location about even
with the bottom of the occulting disk; horizontal location
1/2 way between the bottom of the occulting disk and the
right edge. (This is about 1/2 way between two bright
stars.)

Approximate coordinates in 1024x1024 imagery
(0,0=upper left; 0,1023=lower left):

1942 793,565
2018 789,565
2042 786,565 (possible tail?)

Rob Matson
Jul 25 2001 19:59:29 Rob Matson
matsonr@saic.com
I'm not seeing anything compelling in the follow-up

C3 images at 2118, 2142 and 2218, so my prior report
was probably nothing. --Rob
Jul 28 2001 11:20:34 Scarmato Toni
toniscarmato@libero.it
Possible comet in 6 consecutive C2 real-time images.


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


2001/07/28 11:30 (1018,892)
2001/07/28 11:54 (1015,879)
2001/07/28 12:06 (1014,864)
2001/07/28 12:30 (1012,854)
2001/07/28 12:54 (1008,842)
2001/07/28 13:31 (1002,824)


Regards,

Toni Scarmato
Jul 29 2001 13:44:56 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
SOHO entered ESR after an ACU reset caused by a watchdog detection at

20:16 UT, July 28. At the time, we had a normal pass with DSN 27. In
order to improve the commanding capability, at 20:33 UT a spacecraft
emergency was declared and at 21:00 UT we got DSN 34.

The roll rate, which was between +0.15 and +0.20 deg was reduced to
+0.08 with two thruster firings.

The transition to CRP mode was completed on July 29 at 3:35 UT, and at
3:37 UT the spacecraft emergency was lifted to release DSN resources.

As of 14:00 UT today, SOHO is in CRP mode and FDF has determined that
the current roll attitude is +162.3 degrees. Target roll angle is +4.59
degrees. Therefore, a roll manouver of some -158 degrees is required.
This will take about five hours. FDF has also determined that there is
no need for a momentum management previous to the recovery roll.

Because we have a gap in 34 meter coverage today (D24 is scheduled from13:45 to 21:20 and D34 from 22:40 until 06:00 tomorrow) it has been
decided to do the COMS backup first (two hours) to go to medium rate,
being able to use 26 meter stations and, keep the roll maneuver going
during the 34 meter support gap.

After the roll there will be a momentum management with a burn time of
two hours approximately.
Jul 30 2001 11:22:00 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

First, I have not been able to verify any of the recent reports of
comets in LASCO data.

Second, while things are OK, it's possible the LASCO doors will not
be re-opened until late this week. Due to an extreme demand on DSN
telescope time, we may not be able to complete a needed SOHO
station keeping maneuver until tomorrow or Wednesday. This
requires a propellant burn and the CDS instrument waits 24 hours
after a burn before opening their doors. This is to protect
against deposits on the CDS optics. After CDS opens their door,
we wait at least 1 hour before opening the LASCO doors. This
is because, it appears that the opening of the CDS doors shakes
loose satellite insulation material, which we don't want to get
deposited on the LASCO optics.

Doug