SOHO-LASCO Comet Reports for 200108

Aug 01 2001 00:55:35 Davydov Yurij
yraary@mail.ru

There is a weak possible object near by the comet SOHO-328.
Difference in coordinates 16-17 pixels. Orbits identical. Possible general parental body.
Object not obvious. Found under machine processing (Program A. Mimeev @ F. Mimeev) the vicinities of comet SOHO-328.
Brightness is sailled decreases and seen on 6 consequent images.
(On the last frame an object in the manner of the single pixel already).
Difficult seen at cartoon in view of small contrast.
Better visible when considering a separate images under greater increase.
Heavy object for identifications.
For the comparison (parenthetically) coordinates of known comet.
(Possible I mistaken in interpreting a nature of object...
But this on computer conscience already.
These coordinates to to me computer gave...)

20010613, 1024?1024, 0?0 bottom/left, telescope ?2.

Time X Y (Time X Y) Difference

1254 980 76
1331 976 98 (1331 975 81) top 17 pixel (98-81)
1354 974 112 (1354 973 95) top 17 pixel
1406 972 119 (1406 972 102) top 17 pixel
1430 970 133 (1430 970 117) top 16 pixel
1508 966 156 (1508 966 140) top 16 pixel

Yurij Davydov
Aug 01 2001 11:18:20 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi,
Just a quick note. The LASCO doors will finally be
opened tomorrow (Thursday). Also, I'm out of the office from
Aug 2 - 8, back on the 9th.

Doug
Aug 01 2001 14:51:39 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
I am unable to confirm any object at the locations provided by Y.

Davydov. The points indicated all appear to be at the level of the
noise in the data.

Doug
Aug 03 2001 09:22:03 Scarmato Toni
toniscarmato@libero.it
Possible comet in real-time C3 images B/W.


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


2001/08/03 08:42 (317,353)
2001/08/03 09:42 (313,349)
2001/08/03 10:23 (312,346)
2001/08/03 12:42 (308,330)


Comment: the positions are approximate and the time gap of
the images is due to the not continue download of the B/W images.
The object is brigth and move toward the Sun on an apparent
Kreutz orbit.

Regards,

Toni Scarmato
Aug 03 2001 10:58:32 Derek Hammer
derek@ra.nascom.nasa.gov
I cannot confirm the report of T. Scarmato. I see only cosmic ray

hits and background noise at the indicated positions.


Derek
Aug 03 2001 11:26:36 Scarmato Toni
toniscarmato@libero.it
Possible comet in C2 images:


Positions 512x152 (0,0) top-left corner

2001/08/03 01:54 (474,442)
2001/08/03 02:06 (468,435)
2001/08/03 02:30 (457,420)

Comment: unfortunately, the previous image is at 00:54 and
the next at 03:57. So, is not possible to verify.
The motion is on a Kreutz orbit.


Regards,

Toni Scarmato
Aug 03 2001 12:04:22 Scarmato Toni
toniscarmato@libero.it
Hi Derek.


Regarding the C3 report I am in agreement with you.


For C2 report we have an X shift of 6 pixels and
Y shift of 7 pixels in 12 minutes between 01:54 and 02:06.
This mean that, if the motion is regular, at 00:54
the position of the object is (504,477), out of the C2 FOV.

Also, at 03:57 we have the position (413,371). At this
position in 512 pixels images I see a diffuse object, but
I am not sure on this.

Regards,

Toni Scarmato
Aug 03 2001 13:16:46 Sebastian Hoenig
Sebastian@sungrazer.org
Regarding Toni's C2 report I am unable to confirm it using 1024

resolution images.

Regards, Sebastian
Aug 03 2001 13:25:56 Scarmato Toni
toniscarmato@libero.it
Derek,


I Have download now the 3 C2 images at 1024 pixels.
The object is well visible at positions:

2001/08/03 01:54 (946,884)
2001/08/03 02:06 (937,871)
2001/08/03 02:30 (916,838)

On images at 03:57 is not visible. Also, I Have
a doubt on the shape of the object.

Regards,

Toni
Aug 05 2001 14:05:10 Derek Hammer
derek@ra.nascom.nasa.gov
Toni, I do not see anything cometary for the 8/3/01 C2 positions

you give. Also, the positions do not interpolate very well and
the object should indeed be visible at 0:54 (991,75) when
extrapolating back via your first 2 positions.


Derek
Aug 06 2001 03:14:56 Scarmato Toni
toniscarmato@libero.it
Possible brigth comet in C3 real-time images


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

2001/08/05 00:42 (402,418)?
2001/08/05 01:42 (400,400)
2001/08/05 02:18 (398,388)
2001/08/05 02:42 (396,382)


Comment: the object is well visible in 512 pixels images,
but the shift in Y axis seem too high.
I am wating other images to confirm.

Regards,

Toni Scarmato
Aug 06 2001 10:03:01 Scarmato Toni
toniscarmato@libero.it
Possible comet in C2 images strting at position


512x512 (0,0) top-left corner


2001/08/05 03:54 (491,395)


Other positions at next post


Toni Scarmato
Aug 06 2001 10:09:11 Scarmato Toni
toniscarmato@libero.it
Update C2 report:



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

2001/08/05 04:06 (485,392)
2001/08/05 04:30 (472,385)


Comment: object moving on a Kreutz orbit toward the Sun.
The shape and brigthness not change in random way.
Seem just a comet.
At this moment the server not responding to download
other images.


Regards,

Toni Scarmato
Aug 06 2001 10:26:40 Scarmato Toni
toniscarmato@libero.it
I can confirm my last report.


The comet continue to be visible on other images.

At next post I will give other positions.

Toni
Aug 06 2001 10:52:10 Scarmato Toni
toniscarmato@libero.it
Update C2 report.



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

2001/08/05 03:54 (491,395)
2001/08/05 04:06 (485,392)
2001/08/05 04:30 (472,385)
2001/08/05 04:54 (460,380)
2001/08/05 05:06 (453,376)
2001/08/05 05:30 (440,368)
2001/08/05 05:54 (426,362)


Comment: comet well visible on 7 consecutive images,
no tail visible.


Regards,

Toni Scarmato
Aug 06 2001 12:28:34 Kazimieras Cernis
cernis@itpa.lt
Can confirm Toni's condensed object.

Kazimieras
Aug 06 2001 13:51:07 michael boschat
aa063@chebucto.ns.ca
Possible sungrazer in C3 images - 20010805_2142 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
--------------------------------------------
20010805_2142.gif 512 x 512 350, 270
20010805_2218.gif 512 x 512 349, 269
20010805_2318.gif 512 x 512 347, 268
20010806_0018.gif 512 x 512 345, 267

Michael Boschat
Aug 06 2001 16:39:47 Derek Hammer
derek@ra.nascom.nasa.gov
I can confirm the recent report by T. Scarmato of a sungrazer in

C2 on 8/5/01. The object is also visible in a handful of C3
images. Rough positions are below............

# HEIGHT DATE TIME ANGLE TEL FC COL ROW
10.32 2001/08/04 23:18:13 242.0 C3 10 676.0 447.0
10.01 2001/08/04 23:42:32 241.8 C3 10 671.0 449.0
9.54 2001/08/05 00:18:05 241.9 C3 10 664.0 453.0
8.43 2001/08/05 01:42:06 241.9 C3 10 647.0 462.0
7.94 2001/08/05 02:18:05 241.4 C3 10 639.0 465.0
7.60 2001/08/05 02:42:05 241.5 C3 10 634.0 468.0
6.67 2001/08/05 03:54:05 239.8 C2 10 982.0 232.0
6.50 2001/08/05 04:06:05 239.6 C2 10 969.0 238.0
6.16 2001/08/05 04:30:05 239.6 C2 10 944.0 252.0
5.80 2001/08/05 04:54:06 239.4 C2 10 918.0 266.0
5.62 2001/08/05 05:06:05 239.4 C2 10 905.0 273.0
5.26 2001/08/05 05:30:05 239.1 C2 10 878.0 287.0
4.89 2001/08/05 05:54:05 238.8 C2 10 851.0 300.0
4.70 2001/08/05 06:06:05 238.7 C2 10 837.0 308.0
4.31 2001/08/05 06:30:05 238.4 C2 10 809.0 323.0
3.92 2001/08/05 06:54:05 238.1 C2 10 781.0 338.0


Derek
Aug 07 2001 05:20:32 Scarmato Toni
toniscarmato@libero.it
Possible comet visible on 4 consecutive C3 images.


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

2001/08/07 05:18 (331,276)
2001/08/07 05:42 (329,274)
2001/08/07 06:18 (326,274)
2001/08/07 06:42 (324,273)

Comment: if the object is real it will be visble also in
C2. I am waiting other images to confirm.

Regards,

Toni Scarmato
Aug 07 2001 08:05:31 Hoenig Sebastian
Sebastian@sungrazer.org
No real object at Toni's indicated positions. Note that the

positions are within the "vignetting zone" where the brightnesses
are strongly decreased!

Regards, Sebastian
Aug 08 2001 15:02:54 Sidda Eraiah
siddalinga@yahoo.com
I think I found a sungrazer crashing into Sun. It is in the middle of the top-left corner of the disc on the edge.


Details:

Time & Name of image Co-ordinates
-------------------- -------------
20010808_1630_c2.jpeg 354 X 393 - possible comet seen here
20010808_1654_c2.jpeg 366 X 401 - same comet seen here
20010808_1706_c2.jpeg 371 X 405 - glow after hitting Sun

0 X 0 is the top left.

Unfortunately, there are no C2 images from 8:30 to 16:30 for 8th August 2001, so I cannot trace anything earlier to 16:30.

Thanks and regards,
Sidda
Aug 08 2001 15:17:24 Sidda Eraiah
siddalinga@yahoo.com
The size of the image used in my last report are 1024X1024 pixels.


Thanks,
Sidda.
Aug 09 2001 09:31:32 Scarmato Toni
toniscarmato@libero.it
Possible comet in C2 images.


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


2001/08/09 06:30 (460,482) B/w ?
2001/08/09 06:54 (459,474)
2001/08/09 07:31 (457,464)


Comment: object well visible on last two images.
I am waiting other images to confirm.


Regards,

Toni Scarmato
Aug 09 2001 09:53:33 Sebastian Hoenig
Sebastian@sungrazer.org
No cometary object at the positions idicated by Toni in 1024 

images.

Regards, Sebastian
Aug 09 2001 09:56:25 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

I've looked at the most recent claims, the ones since the
confirmation of the Aug 4-5 comet.

I cannot confirm any of these recent claims. As Sebastian
says about the T. Scarmato claim for an object on Aug 7, the
suspected object doesn't seem reasonable.

For the S. Eraiah claim of Aug 8, there are only two points which
seem reasonable. The third, is obviously very different from the
first two. The edge of the Sun is actually far inside the disk
and no such glow has ever been seen for any comet.

The latest T. Scarmato claim, for Aug 9, seems unlikely. The
apparent motion is not linear.

Doug
Aug 10 2001 04:01:29 Scarmato Toni
toniscarmato@libero.it
Possible comet in C2 real-time images.


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

2001/08/10 06:06 (506,460)
2001/08/10 06:30 (496,451)
2001/08/10 07:31 (476,428) B/W


Comment: object well visible move toward the sun.
Sem just a comet. I am waiting other images to confirm.


Toni Scarmato
Aug 10 2001 08:17:01 Sebastian Hoenig
Sebastian@sungrazer.org
Regarding Toni's report in 1024 im ages:


It doesn't seem to be a comet. In the images of 6:06 and 6:30
there are these 2 bright spots but in 7:54 image nothing is at
the positions where the object should be. One have to be careful
with reports of objects with that shape especially after strong
CME's or X-flares. Threre are a couple of these "objects" in
indicated images.

Regards, Sebastian
Aug 10 2001 09:09:21 Scarmato Toni
toniscarmato@libero.it
Hi all.


Yes, Sebastian is rigth, I Have download now other images and on 07:54 image the object is not visible, but on image at 07:31 B/W there is an object in agreement with the others points also in
shape and brigthness.

It is an X comet?

I am searching in 1024 C3 images to verify. Seem fairly brigth
to be visible in C3 camera if it is real.

Regards,

Toni


Aug 10 2001 09:12:04 Sebastian Hoenig
Sebastian@sungrazer.org
Toni,


I have already checked the 1024 C3s and could not find anything.

Sebastian
Aug 12 2001 21:00:34 Melvin Bundy
mrferengi@yahoo.com
Possible sungrazer comet in LASCO C2 images.


12 Aug 01 - 1756hrs PST

Only have three consecutive frames.

Positions: 512x512 images,(0,0) upper left

time (x,y)

2001/08/11/0554 - 417,186
2001/08/11/0606 - 399,198
2001/08/11/0630 - 363,214

Best regards

Mel
Aug 12 2001 23:17:18 Tony Hoffman
Tony.Hoffman@worldnet.att.net
Possible comet in C3 realtime images (1024 x 1024)


0813_0018 968, 565
0813_0042 963, 563
0813_0142 959, 561
0813_0218 953, 559

Condensed and brightening.

--Tony Hoffman
Aug 12 2001 23:52:01 Tony Hoffman
Tony.Hoffman@worldnet.att.net
Nothing at 0318. (Positions were from upper left, by the way.)


--Tony Hoffman
Aug 13 2001 11:48:55 Scarmato Toni
toniscarmato@libero.it
Possible comet in C3 real-time images.


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

2001/08/13 08:42 (357,348)
2001/08/13 09:18 (356,346)
2001/08/13 10:20 (352,342)
2001/08/13 10:42 (351,339) brigh

Commnet: the object seem moving on a reliable orbit
toward the sun.
I am waiting other images to confirm.

Regards,

Toni Scarmato
Aug 13 2001 15:10:01 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi all,
I've checked all the recent reports and cannot confirm
any of them. None of them appear in additional frames which would
be required for confirmation. In addition, some of them are
bright in one image and not there in the image before (or after).
Just not reasonable.

A note about our observations. Beginning tomorrow, Aug 14,
we are taking full color filter sequences in the C3 telescope
every 2 hours for a whole month. We are hoping to actually catch
some comets. I don't think this will actually be noticeable to you
and it doesn't require anything special. Just the usual detection
of comets. But, the brighter the better.

Doug
Aug 14 2001 15:09:33 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

A few notes:

First, the data gap on Aug 14 from 0100-1600 UT is real and will
not be filled in. Something happened to our on-board computer,
we don't know what. It appears to be functioning properly now.
See how suddenly this all could end?

Second, due to the difficulties and the lack of Deep Space
Network Telescope time for SOHO, we were unable to load the
plan containing the color sequences for C3. We did run a single
sequence at 1800 UT, but that'll be it until tomorrow. We're
hoping everything will return to normal tomorrow.

Doug
Aug 15 2001 08:16:48 Sebastian Hoenig
Sebastian@sungrazer.org
Possible comet in LASCO C3 b/w images, starting 20010815_0642_c3


Date: Aug 15, 2001

Description: Moving dot in 4 b/w images.

Positions: (0,0) upper left, 512x512 images (extrapolated from
b/w by substracting 50 pix from y-pos)

Time (x,y)
06:42 360,303
07:42 355,300
08:42 350,296
09:42 344,292

I missed the xx.18 images.
More on this soon.

Sebastian Hoenig
Aug 15 2001 08:53:49 Oates Michael
mike@ph.u-net.com
C/1996 J1 Evans-Drinkwater found in LASCO C3 images


It is in 190 (one hundred and ninety) C3 images from
21 Dec 1996 04:18 to 9 Jan 1997 12:55 It will also be
in other images of different image formats and sizes,
all the images I have checked are 1024x1024

Sample position with Magnitude
LASCO C3 1024x1024 images
0,0 in bottom left corner

Image Col Row Date Time Mag
32011096.fts 21 701 1996/12/22 22:36:40.981 8.5

I will post more positions at a later time and hopfully
produce a light curve. The above Mag estimate is provisional.

Joint credit for this find goes to Jonathan Shanklin.
Jon asked me if I could check the C3 images from
20 Dec 1996 to 9 Jan 1997 as he calculated it may just be
in the C3 field at the northern edge, but it may be too
faint to be detected. I downloaded and processed the images
for this period only to find it was not there.

I obtained the elements for the orbit from Jon and I
worked out that it that it should be at the left hand
edge of the images moving upwards slowly. Another look
at the images soon uncovered the comet.

C/1996 J1 is fairly condensed with a very slightly diffuse
coma. No tail is visible. It's brigtness does vary along it's
track.

The images for the period 29 Dec 1996 to 9 Jan 1997
are very sparse at the full resolution with about 2 images
per day.

Incidently, this is another 'Twin' if it can loosly be called
that, (very loosly, I know it's not really) the other comet
in the same field is SOHO-6

Regards

Michael Oates
Aug 15 2001 09:35:42 Sebastian Hoenig
Sebastian@sungrazer.org
Additional information on my last report.


I tended to withdraw my report because the object changes very
much in shape regarding the 1024 images. What makes me hesitating
is that I could locate it in the 1024 images of 6:18, 6:42, 7:42,
8:18, 8:42, 9:18, 9:42 (+ 5:42 b/w) on a reliable trajectory with
reliable speed. That's a strong argument PRO comet. I now give
the 1024 positions, (0,0) upper left.

Time (x,y)
05:42 730,614 b/w
06:18 725,611
06:42 720,607
07:42 710,600
08:18 704,596
08:42 700,592
09:18 694,588
09:42 689,584

I am suspended how this will be decided.

BTW: Well done Mike and Jon!

Regards, Sebastian
Aug 15 2001 10:04:11 Sebastian Hoenig
Sebastian@sungrazer.org
Additional information #2 on comet report.


Okay, now I am quite sure on it. 10 images are confirmation
enough , isn't it. Bad luck for Doug as he couldn't use it for the
color series investigation.

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

Time (x,y)
04:42 739,622
05:18 735,618
05:42 730,615
06:18 725,611
06:42 720,607
07:42 710,600
08:18 704,596
08:42 700,592
09:18 694,588
09:42 689,584

Regards, Sebastian
Aug 16 2001 08:58:06 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Sorry for the long delay, I was just waiting for the data gaps
to get filled in. I do confirm S. Hoenig's claim for a comet in
the C3 data from Aug 16. I haven't spotted this one in C2, but
it is pretty darn faint. My position measurements given below.
This makes it SOHO-344.

Doug

#COMMENT: COMET SOHO-344
# HEIGHT DATE TIME ANGLE TEL FC COL ROW
14.22 2001/08/15 05:42:05 240.0 C3 10 730.0 408.0
13.82 2001/08/15 06:18:05 240.5 C3 10 725.0 413.0
13.48 2001/08/15 06:42:05 240.5 C3 10 720.0 416.0
12.82 2001/08/15 07:42:35 240.9 C3 10 711.0 423.0
12.32 2001/08/15 08:18:05 241.2 C3 10 704.0 428.0
12.03 2001/08/15 08:42:05 241.4 C3 10 700.0 431.0
11.61 2001/08/15 09:18:05 241.5 C3 10 694.0 435.0
11.33 2001/08/15 09:42:31 241.7 C3 10 690.0 438.0
10.78 2001/08/15 10:20:04 241.9 C3 10 682.0 443.0
10.52 2001/08/15 10:42:05 242.6 C3 10 679.0 447.0
9.92 2001/08/15 11:18:05 242.7 C3 10 670.0 452.0
9.63 2001/08/15 11:42:05 243.0 C3 10 666.0 455.0
Aug 17 2001 02:59:09 Col. J.E.S. Singh
jessra@sancharnet.in

Possible comet, not Kreutz, visible in five cosecutive C3 images.

Format- 1024x1024 Pixels (0,0) Top left corner

Date Time X Y Movement Area Swept
(Pix/Min) (Sq Pix)
2001 08 13 08:42 873,785
2001 08 13 09:18 875,785 0.056 8
2001 08 13 10:20 878,785 0.048 7
2001 08 13 10:42 879,785 0.045 6
2001 08 13 13:42 887,785 0.044 6

Regards
Enoch Singh
Aug 17 2001 08:58:01 Scarmato Toni
toniscarmato@libero.it
Suspect brigth object visible in C3 images.


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

2001/08/17 03:42 (327,285)
2001/08/17 05:18 (316,277)
2001/08/17 05:42 (315,275)


Comment: if the object is real it must to be
visible in C2 images. I am searching to confirm.

Note: the object is not visible on image at 03:18.

Regards,

Toni Scarmato
Aug 17 2001 10:03:22 Doug Biesecker
doug@sungrazer.nascom.nasa.gov
I am unable to confirm the last two reports.


The report of E. Singh is almost certainly a star, as the
motion is consistent with all of the other stars in the image.
As always, anything moving left to right is most probably a
star or planet.

The report of T. Scarmato appears to be just cosmic rays. When
the data are as noisy as they are right now, one probably needs
to observe something in much more than 4 images for us to confirm
it. These solar proton storms just make the data difficult for
quite a long period of time. Nothing for us to do but wait for
the flux to go down.
Aug 17 2001 21:35:39 Col. J.E.S. Singh
jessra@sancharnet.in

Further to my report logged at 20010817 025909 I have six more
positions of the object (total 11 positions). Object Moving away
from the sun in a predictable manner.

Format- 1024x1024 Pixles (0,0) Top left corner

2001 08 13 07:42 871,785
2001 08 13 08:18 872,785

2001 08 13 14:18 888,785
2001 08 13 14:42 889,785
2001 08 13 15:18 891,785
2001 08 13 15:42 892,785

Regards
Enoch Singh

Aug 18 2001 09:08:46 Sebastian Hoenig
Sebastian@sungrazer.org
Just a quick note:


I have figured out that the star indicated by Enoch Singh is
SAO 98344 (8.9mag, RA 9h05m2.86s, DEC +1133m57.42s).

Regards, Sebastian
Aug 18 2001 10:13:58 Scarmato Toni
toniscarmato@libero.it
Dear Doug,


waiting the end of the strong flux from the Sun, I Have looking
again at the images of the report from Aug 13 2001
11:48:55 regarding an object in C3 images.

I find that the object seem visible on other images starting
form 07:42 UT.

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

2001/08/13 07:42 (360,349)
2001/08/13 08:18 (358,348)
2001/08/13 08:42 (357,347)
2001/08/13 09:18 (356,346)
2001/08/13 10:20 (352,342)
2001/08/13 10:42 (351,340)

This last position is different to previous post because
looking well on images I Have noted that the brigth point
is not in agreement. Instead, there is another point more faint
that is in agreement with the previous point in shape,
brigthness, and with the time interval.

Due to the time gap of the images, I Have extrapolated the
positions for the object.
If the motion is regular at 13:42 UT the object must to be
approximately at X=340 and Y=324.

I find an object at followings approximate positions:

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

2001/08/13 13:42 (340,325)
2001/08/13 14:18 (338,323)
2001/08/13 14:42 (337,322)
2001/08/13 15:18 (334,318)
2001/08/13 15:42 (333,316)
2001/08/13 16:18 (330,314)

The object continue to be faint.

Now,I want to work on 1024 images to verify this observations
and eventually to do positions more precises.

Regards,

Toni Scarmato


Aug 18 2001 14:27:22 Michael Oates
mike@ph.u-net.com
Update: Positions for C/1996 J1 Evans-Drinkwater 

found in SOHO LASCO C3 images.

I was going to produce a light curve for this comet, but as I
am having difficulties, and this is a rather important find,
Doug will be making the measurments. I show the positions here
for those who would like to see the comet for themselves.

LASCO C3 1024x1024 images
0,0 in bottom left corner
As there are rather a lot of these images (190), I am
posting approx 1 in 10 here with positions.

Image Col Row Date Time Mag & Notes
32011051.fts 7 680 1996/12/21 04:18:11.333
32011079.fts 16 693 1996/12/22 07:34:16.599
32011088.fts 19 697 1996/12/22 15:06:45.639
32011097.fts 22 702 1996/12/22 23:26:42.452 8.5
32011238.fts 24 705 1996/12/23 06:57:46.792
32011249.fts 27 710 1996/12/23 16:48:57.752
32011257.fts 29 714 1996/12/23 23:29:30.121
32011128.fts 32 718 1996/12/24 07:50:35.134
32011137.fts 34 722 1996/12/24 15:20:59.173
32011147.fts 37 726 1996/12/25 00:12:28.767
32011157.fts 40 730 1996/12/25 08:33:13.178
32011167.fts 42 735 1996/12/25 16:54:03.991
32011177.fts 45 739 1996/12/26 01:52:54.181
32011187.fts 48 743 1996/12/26 10:13:49.593
32011197.fts 51 748 1996/12/26 19:54:57.458
32011207.fts 53 752 1996/12/27 04:15:39.972
32011217.fts 55 757 1996/12/27 12:36:44.081
32011227.fts 58 761 1996/12/27 21:43:05.555
32011637.fts 62 768 1996/12/28 11:55:37.275
32011668.fts 66 773 1996/12/28 22:20:19.020
All available 1024x1024 images are included from this point
32011260.fts 67 777 1996/12/29 04:18:10.732
32011261.fts 71 783 1996/12/29 16:38:04.712
32011272.fts 74 789 1996/12/30 04:18:10.115
32011284.fts 77 795 1996/12/30 16:17:48.007
32011294.fts 81 801 1996/12/31 04:18:11.797
32011306.fts 85 806 1996/12/31 16:18:36.688 Superimposed on noise? very bright
32011317.fts 88 813 1997/01/01 04:18:08.678
32011329.fts -- --- 1997/01/01 16:18:11.369 Missing data in comet area
32011340.fts 94 825 1997/01/02 04:18:09.060
32011352.fts 98 831 1997/01/02 16:18:09.450
32011363.fts 101 837 1997/01/03 04:18:10.441
32011390.fts 107 848 1997/01/04 04:18:11.839
32011408.fts 110 854 1997/01/04 16:22:27.577
32011425.fts 113 860 1997/01/05 04:18:10.419 Superimposed on noise? very bright
32011443.fts 116 866 1997/01/05 16:18:10.961
32011450.fts 117 868 1997/01/05 20:45:06.728
32011461.fts 119 872 1997/01/06 04:18:10.001
32011497.fts 125 884 1997/01/07 04:18:09.683
32011510.fts 127 888 1997/01/07 12:55:05.425
32011521.fts 129 892 1997/01/07 20:24:27.400
32011532.fts 131 896 1997/01/08 04:18:09.561
32011545.fts 133 900 1997/01/08 12:55:05.600
32011556.fts 135 904 1997/01/08 20:45:05.461 Close to star
32011557.fts 135 904 1997/01/08 21:38:44.434 Close to star
32011567.fts 137 908 1997/01/08 04:17:58.731
32011580.fts 139 911 1997/01/09 12:55:05.369
32011590.fts 141 915 1997/01/09 19:53:30.156

Regards

Mike
Aug 18 2001 14:47:39 Sebastian Hoenig
Sebastian@sungrazer.org
Toni, I checked the 1024 images on Aug 13 and again today. There

is absolutely nothing above the noise level. At the second set of
positions you spot in some images one of the Stars
SAO 98502 (8.6mag), SAO 98501 (9.2), SAO 98485 (9.1). They are
very hardly visible in 1024 images and at least the 14:18 position
is one of the stars. Also this secons set of positions contains
some inconsitances.

Regards, Sebastian
Aug 20 2001 11:36:16 Scarmato Toni
toniscarmato@libero.it
Possible comet in C2 images.


Starting at 2001/08/20 00:54 at positions (480,454) on image
512x512 (0,0) top-left corner.
Visible in 4 consecutive images fading too fast.

Other positions at next post.


Regards,

Toni Scarmato
Aug 20 2001 12:01:47 Scarmato Toni
toniscarmato@libero.it
Upadate C2 last post:


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


2001/08/20 00:54 (480,454)
2001/08/20 01:31 (463,441)
2001/08/20 01:54 (455,432)
2001/08/20 02:06 (452,427)


Comment: the object starting very condensed and fade too fast.
I am unable to find it on other 512 pixels images.


Regards,

Toni
Aug 21 2001 18:30:15 Rainer Kracht
R.Kracht@t-online.de
Possible comet in LASCO C2 images


Date Aug 21, 2001

faint spot moving with about 60 pixel/hour

Positions in 512x512 images
enlarged to 1024x1024

Time (x,y) from upper left

20:27 1006,352
20:50 985,349
21:26 950,345
21:50 926,342
22:06 910,340

Regards,
Rainer Kracht


Aug 22 2001 14:29:18 michael boschat
aa063@chebucto.ns.ca
Possible comet in C3 images - 20010822_1642 UT


Object just above 4 pm solar streamer right side,
moving away in 2 images towards the dark "glitch"
in C3.

Hard to know when next new images are coming out
or if they will be on time. Is SOHO having problems?

Yeah, I know, less than 3 images to be sure.

****** 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
--------------------------------------------
20010822_1642.gif 512 x 512 333, 264
20010822_1718.gif 512 x 512 334, 263

----------------
Michael Boschat

Aug 22 2001 16:11:46 Rainer Kracht
R.Kracht@t-online.de
Update C2 Report Aug 21


one additional image and 1024x1024 images

Time (x,y) from top left Size used
20:27 1007/352 1024x1024
20:50 986/350 1024x1024
21:26 950/346 1024x1024
21:50 926/342 512 enlarged to 1024
22:06 910/340 512 enlarged to 1024
22:27 888/339 1024x1024

The 1024 images from 21:50 and 22:06 are still missing.
The object could be visible in these images also:

23104216.fts 20:54 150.1 sec Blue Clear
23104217.fts 20:59 25.1 sec Orange Clear.

Object not found in images 23:26, 23:50 and 00:06.

Regards,

Rainer Kracht
Aug 22 2001 18:43:33 michael boschat
aa063@chebucto.ns.ca
Disregard my report of:


Aug 22 2001 14:29:18

Nothing seen.

Mike B.
Aug 23 2001 11:58:51 Scarmato Toni
toniscarmato@libero.it
Possible comet in C3 at position


512x512 (0,0) top-left corner

2001/08/23 13:42 (395,335)
2001/08/23 14:42 (387,328)
2001/08/23 15:18 (384,333)

The object move toward the sun on a reliable orbit and
increase your brigthness in reliable way.

I am waiting other images to confirm.


Regards,

Toni Scarmato
Aug 23 2001 12:09:14 Scarmato Toni
toniscarmato@libero.it
No consider my last report the object is not visible at

15:42.

Toni Scarmato
Aug 24 2001 19:40:14 Sebastian Hoenig
Sebastian@sungrazer.org
Hi all.


Doug seems to be quite busy at the moment so I have looked at all
the recent reports, so everybody can get an idea what's going on:


Toni (Aug 20 2001 11:36:16) Combination of cosmic rays of the
ongoing proton event

Rainer (Aug 22 2001 16:11:46) Yes, that looks good. I could
follow the object in th Fits images
and it seems to be a non-Kreutz
comet visible in 6 images.
If you ask me: Congratulations!

All the other reports have been withdrawn.

Regards, Sebastian
Aug 25 2001 08:10:50 Dong Hua Chen
cdh_email@163.net
Possible realtime comet in c2 images:

1024x1024 top-left corner

2001/08/25 0806 714 18
2001/08/25 0926 721 83
2001/08/25 0950 714 101
2001/08/25 1106 693 163
Aug 25 2001 08:12:00 Dong Hua Chen
cdh_email@163.net
Possible realtime comet in c2 images:

1024x1024 top-left corner

2001/08/25 0806 714 18
2001/08/25 0926 721 83
2001/08/25 0950 714 101
2001/08/25 1106 693 163


Chen Dong Hua
Aug 25 2001 08:59:22 Dong Hua Chen
cdh_email@163.net
Update C2 last post:


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

2001/08/25 741 18
2001/08/25 721 83
2001/08/25 714 103
2001/08/25 693 162

Sorry

Chen Dong Hua
Aug 25 2001 10:49:27 Scarmato Toni
toniscarmato@libero.it
I can confirm the object observed by Chen Dong.


Seem just a not Kreutz comet also visible on 4 C2 images
at 512 pixels.



Regards,

Toni
Aug 25 2001 11:42:18 Scarmato Toni
toniscarmato@libero.it
Continuing my search in C2 images I Have observed 

another suspect object on 4 consecutive images
at following positions:


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

2001/08/25 08:06 (27,362)?
2001/08/25 09:26 (35,356)
2001/08/25 09:50 (38,353)
2001/08/25 11:06 (47,347)

Comment: object moving on a not Kreutz orbit.
I am not sure on this one because need other images
to confirm. Also, on the last images the brigthness
increase much.

Regards,

Toni Scarmato
Aug 25 2001 12:18:54 Sebastian Hoenig
Sebastian@sungrazer.org
I cannot confirm Toni's observation but I also do confirm Chen

Dong Hua's non-Kreutz comet.

Regards, Sebastian
Aug 26 2001 00:02:33 Dong Hua Chen
cdh_email@163.net
A suspect object in 4 realtime c2 images, 

it seem has a tail and moved away the Sun.
What is it? The comet that I found yesterday?

1024x1024 (0,0) top_left corner

2001/08/26 0027 470 809
2001/08/26 0050 464 826
2001/08/26 0127 454 852
2001/08/26 0206 444 881

I am waiting other images.

Chen Dong Hua
Aug 26 2001 00:17:26 Dong Hua Chen
cdh_email@163.net
The suspect object can be seen on image

at 23:26 (2001/08/25).

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

2001/08/25 2326 487 762

Chen Dong Hua
Aug 26 2001 02:13:42 Leprette Xavier
xavier.leprette@education.gouv.fr
Congratulations Chen, it's seems that it's the same nice non-Kreutz comet that you discovered yesterday. May be it will be visible also in C3 soon.

Xavier L.
Aug 26 2001 03:16:21 Leprette Xavier
xavier.leprette@education.gouv.fr
non-Kreutz Chen's comet is visible in  3 C3 images now from 3:42 to 6:42 under the occultor.

Xavier
Aug 26 2001 05:18:19 James Danaher
danaher@sprynet.com
The C3 positions for the object reported in C2 Chen Dong Hua are

(based on 1024x1024 upper left 0,0):
8/26 0342 x=501 y=580
8/26 0518 x=496 y=592
8/26 0642 x=493 y=602
8/26 0742 x=490 y=608
James Danaher
Aug 26 2001 06:28:05 Scarmato Toni
toniscarmato@libero.it
Possible comet in 4 consecuitive real-time C3 images.


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

2001/08/26 06:42 (438,337)
2001/08/26 07:42 (435,333)
2001/08/26 09:18 (428,324) b/w
2001/08/26 09:42 (427,323)


Comment: object moving to the sun on an apparent Kreutz
orbit, wel visible on 512 images.


Regards,

Toni Scarmato
Aug 26 2001 07:11:03 Sebastian Hoenig
Sebastian@sungrazer.org
I cannot confirm Toni's object.


Chen's non-Kreutz comet must have a relatively large perihelion
distance as the tail points towards the sun in C2 and the movement
through C2 images is quite slow.
Aug 26 2001 07:32:54 terry lovejoy
tlovejoy@bigpond.net.au
Further to Sebastian's comments about Chen's comet, looks

like a possibility for ground based observations from the
southern hemisphere in a week or two. Hope we get an orbit
on this one before then!

Terry Lovejoy
Aug 26 2001 10:07:25 Michael Oates
mike@ph.u-net.com
Congratulations to Chen for this find.


If you look at the velocity of this comet, it has slowed right
down by 12:42. I suspect that it may be at the furthest southerly
point, and may start to move back toward the Sun shortly, moving
back along the path it came, but slightly to the left of it's
previous path. In other words we are looking at the orbit roughly
edge on, with a perihelion time at about 7:00 UT 26 Aug.

A very nice discovery.

Michael Oates
Aug 26 2001 17:08:08 Michael Oates
mike@ph.u-net.com
Chen's comet has re-entered the C2 field at 18:50

Just as I predicted :) (Well it's either that or another one)
Much fainter this time round.

0,0 in bottom left corner of 1024x1024 C2 images
Image Col Row
20010826_1850_c2.gif 354 4
20010826_1927_c2.gif 359 23
20010826_2027_c2.gif 366 55

Michael Oates
Aug 26 2001 17:30:49 Sebastian Hoenig
Sebastian@sungrazer.org
Mike,


it indeed is Chen's comet. I followed it in C3 and it faded
dramatically.

Regards, Sebastian
Aug 26 2001 20:21:42 michael boschat
aa063@chebucto.ns.ca
Possible ex-sungrazer in C3 images - 20010826_1842 UT


There is a bright point moving
away from Sun above the semi-bright
star above the dark "glitch" to the
right. Near the 4 pm position.
The area is bright and was hard to
get exact XY's but close to area.

( ) -- disk

. - object
* -- star
# -- dark glitch


****** 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
--------------------------------------------
20010826_1842.gif 512 x 512 351, 251
20010826_2042.gif 512 x 512 354, 251
20010826_2118.gif 512 x 512 356, 251
20010826_2142.gif 512 x 512 359, 252

----------------
Michael Boschat
Aug 27 2001 08:10:32 michael boschat
aa063@chebucto.ns.ca
Disregard my last post. 

It's unusal that I can see the object
on 512 pixel images "but" after a long download
of the 1024 pixel images, it was not visible!
amazing.

I think my eyes are going bad now.
Hard to see things as I could last year
even looking at the sky is funny.
I could not even see the new soho comet
in C2 on it's "return" as said
by Oates!!

Mike Boschat
Aug 27 2001 08:20:33 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

Hi all,
Sorry for the lack of posts. I've been checking the reports
but not posting myself. Other things are occupying my time.

Anyway, the Aug 21 C2 object reported by R. Kracht is still
being considered. I haven't made up my mind on this one.

The Chen Hua Dong find for Aug 25-26, the non-Kreutz comet
is of course, easily confirmed and did apparently do a C2-C3-C2
transit thing, fading rapidly. A short period comet inclined 90
degrees to the ecliptic? That's a strange one, I think. Still
waiting on more data. My positions below:

# HEIGHT DATE TIME ANGLE TEL FC COL ROW
3.07 2001/08/25 23:26:05 173.9 C2 10 486.0 260.0
3.30 2001/08/25 23:50:05 173.0 C2 10 480.0 242.0
3.46 2001/08/26 00:06:07 172.3 C2 10 475.0 230.0
3.65 2001/08/26 00:27:16 171.8 C2 10 470.0 215.0
3.86 2001/08/26 00:50:05 171.3 C2 10 465.0 198.0
3.65 2001/08/26 00:27:16 171.8 C2 10 470.0 215.0
3.86 2001/08/26 00:50:05 171.3 C2 10 465.0 198.0
4.21 2001/08/26 01:27:18 170.3 C2 10 455.0 171.0
4.42 2001/08/26 01:50:06 169.8 C2 10 449.0 155.0
4.57 2001/08/26 02:06:07 169.4 C2 10 444.0 143.0
4.76 2001/08/26 02:27:11 169.1 C2 10 439.0 128.0
4.96 2001/08/26 02:50:05 168.8 C2 10 434.0 113.0
5.25 2001/08/26 03:26:12 168.2 C2 10 425.0 90.0
5.45 2001/08/26 03:50:05 168.0 C2 10 420.0 74.0
5.60 2001/08/26 04:06:07 167.7 C2 10 415.0 63.0
5.75 2001/08/26 04:27:14 167.4 C2 10 410.0 51.0
6.19 2001/08/26 05:26:06 166.9 C2 10 398.0 17.0
6.35 2001/08/26 05:50:05 166.7 C2 10 393.0 4.0
6.47 2001/08/26 18:50:06 162.5 C2 10 354.0 5.0
6.25 2001/08/26 19:27:20 162.3 C2 10 358.0 23.0
6.10 2001/08/26 19:50:06 162.2 C2 10 361.0 35.0
6.00 2001/08/26 20:06:05 162.3 C2 10 364.0 42.0

# HEIGHT DATE TIME ANGLE TEL FC COL ROW
4.98 2001/08/26 03:18:05 169.6 C3 11 502.0 446.0
5.22 2001/08/26 03:42:06 169.4 C3 11 501.0 442.0
5.90 2001/08/26 05:18:12 167.8 C3 11 496.0 431.0
6.08 2001/08/26 05:42:05 167.6 C3 11 495.0 428.0
6.51 2001/08/26 06:42:09 166.9 C3 11 492.0 421.0
6.93 2001/08/26 07:42:06 166.8 C3 11 490.0 414.0
7.31 2001/08/26 09:18:05 166.1 C3 11 487.0 408.0
7.43 2001/08/26 09:42:07 165.8 C3 11 486.0 406.0
7.49 2001/08/26 10:42:09 166.0 C3 11 486.0 405.0
7.56 2001/08/26 11:18:05 165.6 C3 12 485.0 404.0
7.69 2001/08/26 11:42:06 165.4 C3 12 484.0 402.0
7.70 2001/08/26 12:42:10 165.0 C3 12 483.0 402.0

Aug 27 2001 09:25:06 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

It's just not my day. Anyway, of course, the comet was first
reported to be visible earlier in the day on Aug 25. Those
positions are given below.

Doug

# HEIGHT DATE TIME ANGLE TEL FC COL ROW
6.76 2001/08/25 08:06:05 335.3 C2 13 743.0 1004.0
6.50 2001/08/25 08:32:13 335.1 C2 13 736.0 983.0
6.16 2001/08/25 09:06:05 334.7 C2 13 727.0 956.0
5.95 2001/08/25 09:26:05 334.5 C2 13 721.0 940.0
5.71 2001/08/25 09:50:05 334.3 C2 13 714.0 921.0
5.29 2001/08/25 10:30:01 333.5 C2 13 704.0 888.0
5.10 2001/08/25 10:50:05 333.4 C2 13 698.0 873.0
4.93 2001/08/25 11:06:05 333.2 C2 13 693.0 860.0
4.73 2001/08/25 11:26:05 332.6 C2 13 689.0 844.0
4.46 2001/08/25 11:50:06 332.2 C2 13 681.0 823.0
4.31 2001/08/25 12:06:05 331.8 C2 13 677.0 811.0
4.08 2001/08/25 12:27:43 331.1 C2 13 672.0 793.0
3.84 2001/08/25 12:50:05 330.4 C2 13 666.0 774.0
Aug 31 2001 08:11:11 Doug Biesecker
doug@sungrazer.nascom.nasa.gov

New! J. Shanklin has compiled a list of asteroids brighter
10.5 that could be seen in the C3 telescope. The list runs
through 2009. Let's hope the mission lasts that long.
Click on the "C3 Transits" page to find the list.

Now, how about some bright sungrazing comets sometime soon?

Doug