SOHO-LASCO Comet Reports for 200302

Dear all,

my partecipation at the pain for the tragedy of the Shuttle.





Possible comet in c3



positions 512x512 0,0 top-left



20030202



1400 169,312

1415 171,310

1430 173,310

1445 175,312





Regards,



Toni Scarmato

Nothing at 1500 regarding my last report.

Only noise.



Toni Scarmato

Possible Kreutz comet in a real-time C3 images now.

 

It is visible in 4 consecutive images of 2003/02/03



0,0 in top-left corner of 512x512 frames :

 

       col, row

20:00  142,331

20:15  143,330

20:30  144,329

20:45  145,328 



Xavier Leprette

Can confirm Xavier Leprette's comet.

It's there also at 2115 UT.



Mike B.

Possible Kreutz comet in a real-time C3 images now.

UPDATE : very tiny comet

 

It is visible (at least) in 7 consecutive images of 2003/02/03



0,0 in top-left corner of 512x512 frames :

 

       col, row

19:30  140,333

19:45  141,332

20:00  142,331

20:15  143,330

20:30  144,329

20:45  145,328

21:15   ... 



Xavier Leprette

Is this a NEW comet or the

same one reported earlier I confirmed

for Xavier??



 mabey one post with

4 XY's is enough than updates!



MB

OK Mike, my second report was an update for the same comet. I have not seen your confirmation.

Regards  -  Xavier

2003 Feb 5 -- Possible non-group comet in real-time C2 beginning at

00:30.  512x512 B&W coordinates (0,0 in upper left corner):



YYYY-MM-DD HH:MM  Col Row

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

2003-02-05 00:30  508 307

           00:54  497 311

           01:31  481 314



Possibly related to C/2002 Q9?  It's fading fast, though.  Will

look for it in C3.



--Rob

Update to 20:41:29 post:  nothing seen in 01:54 B&W C2 frame

at the extrapolated position, so it was either noise or

unconfirmable.  Same result either way.  --Rob

c3 top/left 1024 20030205



1142 442 651

1118 443 653

1042 444 654

1020 445 655

0942 447 656



A. M.

Possible Kreutz in C3 images earlier today 2003/02/05



Very small and faint



1024x1024 gifs.  0,0 Top Left



03:42   351, 609

04:18   358, 603

04:42   362, 599

05:18   369, 592

05:42   373, 588



- Dave

Hello, I can confirm the dim Kreutz comet reported by 

X. Leprette.  It was visible only in C3 (some rough positions

are below) and is SOHO583.  I could not confirm anything real for

the other reports.





#COMMENT: SOHO583

# HEIGHT   DATE     TIME   ANGLE  TEL  FC    COL     ROW

 16.06 2003/02/03 20:30:07 126.2   C3  10   289.0   364.0

 15.95 2003/02/03 20:45:06 126.0   C3  10   290.0   366.0

 15.51 2003/02/03 21:15:06 125.9   C3  10   296.0   371.0

 14.50 2003/02/03 22:30:56 125.4   C3  10   309.0   383.0

 14.01 2003/02/03 23:15:14 125.4   C3  10   316.0   388.0

 13.82 2003/02/03 23:30:36 125.1   C3  10   318.0   391.0

 12.65 2003/02/04 00:55:36 124.8   C3  10   334.0   404.0

 12.05 2003/02/04 01:41:21 124.4   C3  10   342.0   411.0

 11.58 2003/02/04 02:14:46 124.0   C3  10   348.0   417.0

 11.17 2003/02/04 02:42:05 124.0   C3  10   354.0   421.0

 10.65 2003/02/04 03:18:05 123.7   C3  10   361.0   427.0

 10.31 2003/02/04 03:42:05 123.1   C3  10   365.0   432.0

  9.74 2003/02/04 04:18:05 122.9   C3  10   373.0   438.0





Derek

Date: Feb 9, 2003 

Possible comet in image C3.



Brief description:

0,0 in upper left corner 

1024x1024





Time                       (x,y)

20030207_18:42    502,406

20030207_18:18    503,402

20030207_17:42    506,395

20030207_17:18    506,388 





Regards,Sergey Shurpakov

Possible comet in C3 images of 2003/03/08



512x512   Lasco B/W   0,0 Top Left



object begins at position

11:18   48,  385



visible in subsequent frames







Update to follow soon...



- Dave

Update to my report of possible comet in C3 images of 2003/03/08



512x512   Lasco B/W   0,0 Top Left



10:23   43, 388

10:44   44, 387

11:18   47, 385

11:42   49, 384

12:18   51, 382





- Dave

Possible Kreutz comet in a real-time C3 images now.

 

It is visible in 3 consecutive images of 2003/02/08



0,0 in top-left corner of 512x512 frames (BW images) :

 

       col, row

14:42  60,372

15:18

15:42    



More positions soon



Xavier Leprette

The real-time object is now a definite Kreutz comet in C3 images

of 2003/03/08



Moderately bright but with no tail visible as yet in the B/W

images...



- Dave

Congrats Dave , my previous report was about the same comet

Xavier Leprette

 Possible Sungrazer in  C3 images 

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

 Black and white converted 1624 converted                                       

20030209  1842  C3  155 819

20030209  1818  C3  153 821

20030209  1742  C3  143 827

More positions soon.

John

Ignore my post. I see that Dave

reported the comettoday. Congrats Dave :)

John

I just realised that my date is incorrect for my real-time comet

report for the Kreutz visible in current C3 B/W images.



It should of course read 2003/02/08 and obviously not 2003/03/08

as mentioned in my previous reports... 



Apollogies...



- Dave

Possible comet in C3 images - 20030208_0642 UT



Comet coming off lower left field

of C3 image.



 ****** NOTE ******

x-coordinates are probably correct, 

but y-coordinates may be off by

several pixels. 

0,460 in lower left corner



LASCO C3 IMAGES - 1024 x 1024



YYYY-MM-DD HH:MM   X   Y

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

2003-02-08 0642    57 238

           0742    65 232

           0842    73 225



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

Michael Boschat

The C3 Kreutz comet I found today (Re Report of Feb 09 2003

11:29:26) has entered the C2 field of view (18:30 image).



- Dave

DISREGARD MY POST OF Feb 09 2003 12:47:37



This was dave's comet that started out at 0642UT 

on the 8th!



M

I was watching the LASCOC3 images covering the last several days.

A small bright spot appeared in the lower left corner around 15:00

on 02/08/03.  It moved quickly toward the sun, and I think it 

developed a tail near 12:00 on 02/09/03.  The spot appeared to

evaporate around 18:00 on 02/09/03!  Has this been confirmed as a

new sungrazer?  How cool!



Is it at all unusual to have so many comets fly so near the sun,

even into the sun, in such a small span of time?  In just a few

weeks of each other, three comets will pass close to the sun, and

for all I know there have even been more than three.



Thank you,

Jeff Koehler

South Milwaukee, WI

Hi, Jeff--



Yes, that was a real sungrazing comet, first reported by David 

Evans on February 09, 2003 11:29:26. If you want to hunt for 

comets, you should learn to measure coordinates so you can check 

against reports yourself. We have a discussion group at 

http://groups.yahoo.com/group/sohohunter/ that you can go to with 

any questions. 



To date, 584 SOHO comets have been found, going back to January 

1996; that averages to one every 4.3 days. Most of them are quite 

faint, but occasionally a few bright ones will be seen in succession.



Regards,

Tony Hoffman

Possible fragment from comet of 

20030209_1830 UT in C2 images.



 Magnifying the images I

seem to note a fragment 

behind the main part.



 ****** NOTE ******

x-coordinates are probably correct, 

but y-coordinates may be off by

several pixels. 

0,460 in lower left corner



LASCO C2 IMAGES - 1024 x 1024



YYYY-MM-DD HH:MM   X   Y

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

2003-02-09 1830    20 137

           1854    48 122

           1931   101  88

           1954   134  71

           2006   155  57

           2030   199  35

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

Michael Boschat

possible Kreutz group comet in C3 images

b/w 512*512 from the LASCO website

enlarged to 1024*1024

0,0 in upper left corner



Date     Time  x   y

20030210 1442 282 628

20030210 1518 288 624

20030210 1612 298 616



 Rainer

UPDATE Kreutz group comet in C3 images

it's visible in 1024 * 1024 also

0,0 in upper left corner



Date     Time  x   y

20030210 1442 282 629

20030210 1518 289 624

20030210 1542 (copy of 1518 image)

20030210 1612 299 616

20030210 1642 305 612

small comet



 Rainer

I can confirm Rainer's C3 Kreutz find -- nice pick-up! --Rob

Possible comet in C3 images - 20030210_2318 UT



 ****** NOTE ******

x-coordinates are probably correct, 

but y-coordinates may be off by

several pixels. 0,460 in lower left corner



LASCO C3 IMAGES - 1024 x 1024



Date      Time   X   Y

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

20030210  2318  207 172

20030210  2342  214 165

20030211  0018  220 161

20030211  0042  226 156



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

Michael Boschat

Hello, there are 2 more Kreutz comets to cofirm...one extremely 

bright (SOHO 584) and one extremely dim (SOHO585). 





 SOHO#   Discoverer     Date        Camera

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

  584    D. Evans     03/02/08-09    C2,C3

  585    R. Kracht    03/02/10       C3





We have made initial plans to observe C/2002 V1 (NEAT).

One problem is that if the comet does indeed reach the C3 FOV at

the predicted magnitude [~0 initially, ~-1 at perihelion], we are

not going to have any unsaturated images in the clear filter. The

reason is that there is a minimum of ~3 seconds for the exposure,

which is too long for this comet. However, we are discussing the

possibility of manually operating the shutter which allows us to

take much shorter exposures. So, if V1 enters C3 at the predicted

magnitude on Sunday do not expect to see many clear filter images.

We'll probably replace them with orange filter observations. Also,

we're toying with the idea of ocassionally adding an H-alpha 

filter image. This is all in addition to short & long red and blue

filter images once per hour (tail observations). Within hours of

perihelion, we're dumping the long exposures, and will take color 

sequences using all the filters for photometrty purposes. Of

course, at least once per hour, we'll have the typical 20 second

exposure, C3 image. Too much info? Just thought I would prepare

everyone.



Derek

2003 Feb 12 -- Dim Kreutz comet in real-time C3 beginning at 16:42.

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



YYYY-MM-DD HH:MM  Col Row

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

2003-02-12 16:42  276 619

           17:18  283 614

           17:42  288 612 (coincides w/star)

           18:18  295 607

           18:42  300 604



--Rob

Possible small Kreutz in recent C3 images of 2003/02/08



05:18  303, 620

05:42  307, 616

06:18  314, 611

06:42  318, 608

07:42  330, 599

08:42  341, 591

09:42  353, 581

10:23  362, 574

10:44  369, 568

11:18  377, 560



- Dave

 

 Possible Sungrazer in  C3 images

 Very faint point.  

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

 Febuary 13 2003     (x,  y)

20030213  2218  C3  265 631

20030213  2142  C3  259 636

20030213  2119  C3  255 640

20030213  2042  C3  249 643

John

Confirmation of real-time C3 Kreutz...



5th position can be seen in 23:18 B/W Lasco image.



Congrats John,



- Dave

I stumbled upon a new comet while downloading images for an animation of SOHO C3 images from Comet X5 transit thru Comet V1 transit.  While animating these images in my screensaver I noticed another comet.  I quickly sent an e-mail to xxx@xxx on Feb. 10th to report this.  I have not heard anything and have not seen anything posted on this comet.  It is not comet X5 or V1 or SOHO B1.  It is visible in SOHO C3 images 20030208_0942 thru 20030209_1818.  I'm sorry I have not found anywhere yet to explain the x,y pixel co-ordinates used to report these, but this comet comes in from the left at about the 8:00 position and heads straight into the sun.



Carey S. Johnson

Amarillo, Texas

Ooops, sorry for wrapped text on previous post.



Carey

Possible comet in LASCO C3 images



Date: Friday, February 14, 2003



Brief description:

Faint comet, small tail visible

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



yyyy.mm.dd hh:mm x   y

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

2003.02.14 02:42 315 596

2003.02.14 02:18 310 600

2003.02.14 01:42 303 604

2003.02.14 00:42 292 613



Regards,

Heiner Otterstedt

Sorry about my previous post,

that was just another confirmation of Johns find!

Congrats John!



Regards, Heiner

Hello, I can only confirm John's C3 Kreutz claim. Some rough

positions are below. 

Carey, that comet was claimed by Dave Evans on Feb 9th. It is

listed in the table, from my last red post, as SOHO584. It will

not receive an official IAU designation until I submit all 

measured positions to CBAT.





SOHO#   Discoverer     Date        Camera

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

 586    J. Sachs     03/02/13-14     C3





#COMMENT: SOHO586

# HEIGHT   DATE     TIME   ANGLE  TEL  FC    COL     ROW

 16.38 2003/02/13 22:18:05 118.9   C3  10   265.0   392.0

 15.60 2003/02/13 23:18:13 118.5   C3  10   276.0   400.0

 15.30 2003/02/13 23:42:05 118.7   C3  10   281.0   402.0

 14.86 2003/02/14 00:18:05 118.3   C3  10   287.0   407.0

 14.58 2003/02/14 00:42:06 118.2   C3  10   291.0   410.0

 13.76 2003/02/14 01:42:05 117.9   C3  10   303.0   418.0

 13.27 2003/02/14 02:18:07 117.6   C3  10   310.0   423.0

 12.92 2003/02/14 02:42:05 117.3   C3  10   315.0   427.0

 12.43 2003/02/14 03:18:05 117.0   C3  10   322.0   432.0

 12.15 2003/02/14 03:42:05 116.8   C3  10   326.0   435.0

 11.62 2003/02/14 04:18:05 116.5   C3  10   334.0   440.0

 11.29 2003/02/14 04:42:05 115.8   C3  10   338.0   445.0

 10.73 2003/02/14 05:18:06 115.9   C3  10   347.0   449.0

 10.33 2003/02/14 05:42:05 115.6   C3  10   353.0   453.0

  9.80 2003/02/14 06:18:05 115.2   C3  10   361.0   458.0

  8.46 2003/02/14 07:42:05 114.0   C3  10   381.0   471.0

Possibly 2 comets found in today's images, 1024x1024, with 0,0 at upper left.  One appears to be trailing the other.  They're very faint.



Leading comet:



20030214_2018_c3.gif    -  415,753

20030214_1942_c3.gif    -  414,757

20030214_1837_c3.gif    -  415,765



Trailing:



20030214_2018_c3.gif    -  412,763

20030214_1942_c3.gif    -  412,767

20030214_1837_c3.gif    -  413,773



Dave Johnson

I have a 4th position to add to my report



Leading comet:



20030214_2042_c3.gif   -  415,749



Trailing comet:

20030214_2042_c3.gif   -  412,760



Dave Johnson

Posible comet in real-time C3 images of 2003/02/14



20:18   163,  687

20:42   166,  685

21:18   171,  682

21:42   174,  680



Very small and faint at present. Could be noise - awaiting

further images. Please disregard if no update.



- Dave

Possible Sungrazer in  C3 images

Very faint fuzzy point. Something 

appears to be moving here.  

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

 Febuary 15 2003           (x,  y)

20030215  1818  C3   127 755

20030215  1742  C3   121 758

20030215  1718  C3   118 760

20030215  1642  C3   114 765

20030215  1618  C3   109 567

John

Kreutz Comet I reported below is 

also visible at 20030215  1842  C3   131 751 

and visible in the real time in Frame 1942.

John

Comet in C3 @ 20030215_2142 UT



More data to come



 ****** NOTE ******

x-coordinates are probably correct, 

but y-coordinates may be off by

several pixels. 

0,460 in lower left corner



LASCO C3 IMAGES - 1024 x 1024



Date      Time   X   Y

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

20030215  2142  157, 171

          

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

Michael Boschat

UPDATE: Comet in C3 @ 20030215_2142 UT



 It begins above a med star in lower

left about 1/4 way up. Med bright

comet. There are 3 stars almost

in a line which would point close

to the star in question.



 ****** NOTE ******

 x-coordinates are probably correct, 

 but y-coordinates may be off by

 several pixels. 

 0,460 in lower left corner



 LASCO C3 IMAGES - 1024 x 1024



 Date      Time   X   Y

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

 20030215  2142  157 171

           2218  162 168

           2318  170 160

           2342  174 157

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

 Michael Boschat

Comet in C3, 1024 x 1024 , 0,0 upper left

Feb. 16, 0142  192,703   

more positions to follow



Tony Hoffman

DISREGARD MY LAST 2 POSTS OF:

Feb 15 2003 20:34:18

Feb 15 2003 20:26:15



 I believe this is John Sachs find from 

earlier today about 1618 UT and I could

not see it until I downloaded ALL the images 

from 1618 to present then looping

back it seems to go right back to the lower left 

almost to frame edge, and BOY it's faint and even 

using the 1024 I never saw it..sooo I guess crapolla 

outta luck on this one.



Mike Boschat

Possible comet in C3 on Kreutz track

 (1024 x 1024, 0,0 in upper left corner)



Feb. 16

0142    192,703

0042    183,710

0018    180,713

Feb. 15

2342    175,717

2318    170,720





Brightening.



--Tony Hoffman

Tony this is John Sachs find of today!



Mike Boschat

C/2002 V1 enter the C3 field(B/W)£¬

0,0 in upper left corner(512 X 512).



15:33 (280,0?)

15:45 (281,0?)

15:54 (282,0)(bright)

16:06 (283,0)(bright)



Regards, XingMing Zhou

Dear Sir,

 

I am Vishnu Vardhan from India. I am new to SOHO Comet

hunting and want to report a possible suspect in C2

images. I am not sure if it is a real or a known

object but do check it and advice me if I am wrong. 

 

Possible comet in C2 



(1024 x 1024, 0,0 in upper left corner)

 

Feb. 16 images 

20030216_1354 302,213 

20030216_1331 298,213 

20030216_1254 290,213

 

Clear skies

Vishnu Vardhan

Spceguard India

www.spaceguardindia.com

 

Vishnu,



this is simply a star. Stars move vertically in the SOHO/LASCO

images. You'll find a lot of them in C3 and C2.



Maik

Vishnu,



this is simply a star. Stars move horizontally in the SOHO/LASCO

images. You'll find a lot of them in C3 and C2.



Maik

I was curious what the apparent object visible in 20030215_2042_c3.gif is - debris?

I'm curious as to the object that enters the image from the top-right and continues downward?



first seen: 20030216_1754_c3.gif

through: 20030217_1854_c3.gif (current image as I write this).



Thanks,

Brian

Omaha, NE

Disregard my last post, please - I figured it out.  I'm new...can you tell?  :-)



Brian

I see the object as reported in C3 realtime imaging for 02/17/2003 and am quite alarmed.  I've witnessed quite a few comets, however, this is something very special.  What do you experts have to say?

Donn Appleby

xxx@xxx

Possible comet in LASCO C3 images



Date: Tuesday, February 18, 2003



Brief description:

Faint comet

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



yyyy.mm.dd hh:mm x   y

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

2003.02.18 00:54  63 798

2003.02.18 01:54  70 797

2003.02.18 02:54  75 795

2003.02.18 03:54  78 793



Regards,

Heiner Otterstedt

Heiner,



what you have reported is a mix of noise and a star. Your first

three positions are just a chance alignment of noise and the 

fourth position is the star coming from the left.



Donn,



this is C/2002 V1 (NEAT) a widely ground-based observed comet

since November 2002.



Shumuk,



yes, this seems to be debris. Cf. http://lasco-www.nrl.navy.mil/debris_gif/



Maik

Hi,



I was just looking at the C3 sequences of C/2002 V1 for my astronomy class, when I noticed a sungrazer going in. It's

visible on 22 frames on the current C3 java sequence, and would

have been visible previous to this. I'm sure other people have spotted it, but thought I would report it any way. The

output from the Java position tool is below. This is much

easier than our astrometry software for our asteroid searches!



Best Wishes

Alan Fitzsimmons



Point   X  Y   YYYYMMDD HHMM  Julmins Height(km)

   0  211 331  20030216 0342  4272702   1.489E7

   1  217 335  20030216 0418  4272738   1.460E7

   2  227 342  20030216 0518  4272798   1.410E7

   3  231 345  20030216 0542  4272822   1.390E7

   4  237 349  20030216 0618  4272858   1.361E7

   5  241 352  20030216 0642  4272882   1.341E7

   6  251 360  20030216 0742  4272942   1.289E7

   7  257 365  20030216 0818  4272978   1.258E7

   8  261 368  20030216 0842  4273002   1.237E7

   9  268 372  20030216 0918  4273038   1.205E7

   10  272 375  20030216 0942  4273062   1.184E7

   11  279 381  20030216 1023  4273103   1.147E7

   12  283 384  20030216 1045  4273125   1.127E7

   13  289 389  20030216 1118  4273158   1.096E7

   14  293 391  20030216 1142  4273182   1.078E7

   15  300 397  20030216 1218  4273218   1.041E7

   16  304 400  20030216 1242  4273242   1.020E7

   17  316 408  20030216 1342  4273302   9623142

   18  330 419  20030216 1454  4273374   8905478

   19  342 427  20030216 1554  4273434   8320623

   20  356 436  20030216 1654  4273494   7645315

   21  370 446  20030216 1754  4273554   6949600

   22  383 456  20030216 1854  4273614   6289855

Dear All,



Just found the recent reports summary page, and the comet

I reported is obviously the one identified by Tony Hoffman

on Feb 15 2003 22:32:46 (my images were 1024x1024, with

(0,0) in lower left corner). My apologies for taking up your

time.



Best Wishes

Alan 

Hello!

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

telescope: C2

image size: 512x512  

(0,0): top-left

coords precise to: 2px

date:  

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



Regards,



Michal Drahus (Krakow, Poland)

xxx@xxx

Sorry! It was my programme's mistake! Please ignore it :)

C/2002 V1 (NEAT) question: Why isn't there a pronounced double

tail at this point?

I have not had a chance to confirm any sungrazer reports since

my last red post, although it looks like John's claim was

confirmed by a few people. The reason is that a rather severe

snow storm has crippled most of the city for the past few days,

preventing me from going to work.  It has also prevented us

from altering any of the C/2002 V1 comet observing sequence. So

if the short exposures are saturated we're out of luck until

tomorrow.  Well, it has certainly gained much attention from

several amateurs based on reports to this page...that's always

nice to see. I do thank the more experienced SOHO comet hunters

for responding quickly to some of the claims that have been made.



Well, hopefully that CME on the solar north-west limb from

earlier today will strike the comet...that's something that has

certainly never been imaged before.  By the way, this comet is by

far the brightest comet SOHO has observed. It should reach a 

magnitude of ~ -2 .....the previous record holder was the Macholz

comet from January, 2002 which peaked at about -0.5...Hyakutake

peaked at about 1.

Possible comet in C3 images - 20030218_2254 UT



 ****** NOTE ******

x-coordinates are probably correct, 

but y-coordinates may be off by

several pixels. 



0,460 in lower left corner



LASCO C3 IMAGES - 1024 x 1024



Date      Time   X    Y

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

20030218  2254  265  77

20030219  0054  272  76

          0154  279  71

          0254  286  68

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

Michael Boschat

Lasco C3 image; MPEG (512 x 512)

frame 2003/02/15  20:42

upper left quadrant  

only visible for one frame on my system

large, bright  



Sorry, I don't know how to do coordinates yet.

DISREGARD MY POST OF
Feb 19 2003 09:52:44

M.B.

C2 image

Center portion

Large bright ball of light

Possibly hydrogen reaction

Makes grass grow.



what is it!?

Michael Boschat,



If you have 0,460 in lower left corner, What do you have in the

upper right corner? 1024,-564?



Debbie Kinloch,



I recently had the same problem of not knowing how to report in 

coordinates.  You can download XnView freeware at http://www.xnview.com/

Once you get it and install it, goto View and select Display Color Information.

Your cursor will turn into an eyedropper and a small box next to

it will display the x,y coordinates for the pixel you're on. Or

in my case I already had Adobe Photoshop 4.0 but was not aware

of a feature.  Under Window, select Show Info and a box will

display x,y coordinates and color info for the pixel you're on.

I prefer the cursor on Adobe, if for your tools you select 

Line Tool then you get a nice small cross-hair instead of an

eyedropper.



It would be helpful if this help would be provided on this webpage

for people like you and I.



Carey

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



Hi Debbie and Carey, 

...and anyone new to Soho comets.



Discussions of the kind you raise should not be posted to the

Finders Page... This page is purely for reports of possible

discoveries only! Having to sift through general discussions to

get to the actual reports not only makes Derek's job more

difficult but also prevents fast access by observers to see if

anyone else has previously posted a similar claim.



Sometimes a comment or two is justified on this page, if highly

topical concerning a current claim for instance, but in general

all other comments should be posted to the sohohunter club site

message board. This can be found at -



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



Indeed, much information can be found at the club site and

perhaps you would both like to actively participate and also

contribute to its discussions. Anyone new to soho comets will

find help there in abundance. All are made welcome... Indeed

anyone with even the slightest interest in soho comets would

benefit if they took a few moments to follow the above link

and join.



Kindest regards to you both and best wishes with your searches,



- Dave



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

Possible Sungrazer in  C3 images

Kreutz Trajectory  Very Faint

May be noise 

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

 Febuary 20 2003      (x,     y)

20030220 1842  C3  133 780

20030220 1818  C3  129 785 

20030220 1742  C3  124 788

20030220 1718  C3  119 793

John    

Hello, that was an impressive showing from C/2002 V1 (NEAT). There

are several interesting events that occurred throughout its path

so I am looking forward to the data analysis. However, I have not

forgotten about the sungrazers. Obviously, John Sachs comet

from Feb 16 in C3 is real, and should make a decent movie as 

it was visible during NEAT.  This is SOHO 587.  I have not looked

at John's most recent claim...I usually wait until at least 10 

images are in before I decide on a C3 comet.  All other claims

have been checked and were not confirmed.



Dave, I still owe you an explanation for why I decided against a C3

claim you made a week(s) ago. I have not forgotten and will let

you know tomorrow.



Derek

Hi:



 What's that image in the C3 2342 UT

image?

 A ghost reflection of the CME?



Mike

Concerning my post below of

Feb 20 2003 14:57:59.

Kreutz C3 Comet.

Disregard.Lost it in noise.

John   

 

Possible Sungrazer in  C3 images

Kreutz Trajectory  Very Faint Fuzzy

Is this possible what I reported Yesterday?

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

 Febuary 21 2003      (x,     y)

20030221 1242  C3   307 618

20030221 1218  C3   303 620

20030221 1142  C3   299 624

20030221 1118  C3   294 628

John

John, this is possibly noise... 



I can see something faint at the positions quoted but based on

your measurements, the difference in the x's and the y's, in

pixels per hour shown in brackets, suggest that the movement is

not constant. 



12:18 to 12:42 (24 minutes)  x = 4 (10.0), y = -2 (- 5.0)

11:42 to 12:18 (36 minutes)  x = 4 ( 6.7), y = -4 (- 6.7)

11:18 to 11:42 (24 minutes)  x = 5 (12.5), y = -4 (-10.0)



- Dave

 

Possible comet in C3 images - 20030223_1142 UT



 ****** NOTE ******

x-coordinates are probably correct, 

but y-coordinates may be off by

several pixels. 0,460 in lower left corner



LASCO C3 IMAGES - 1024 x 1024



Date      Time   X   Y

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

20030223  1142  138 240

          1218  141 237

          1242  144 233

          1342  148 232

          1418  150 229

          1442  152 227

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

Michael Boschat

CORRECTION to my last post::::>>

DATE SHOULD BE FOR today 24th  NOT 23rd!

                         ^^^

Mike Boschat.

Hello, I was not able to confirm any new comets. As most of you

have noticed, the LASCO doors are closed for routine

momentum management maneuvers. The doors are expected to reopen

on Feb 27 at ~ 17:00 UT.



Derek

20030217_1354_c3.gif  At 9:00 if it is a comet it  will be behind the sun now Bruce

i found a comet with a yellow type color behind it 

it was big and after 9 seconds it blew off

Hello,



Bruce, to make a comet claim you need to send me the x & y pixel

positions of your suspect object in at least 4 consecutive images.

This info is listed in the "Found Something?" section along with

some other info regarding typical mistakes that beginners make

when claiming a comet. Please have a look.



Konarch, this page is for comets found in SOHO images only.



If anyone would like to learn more about SOHO comets by asking

questions and picking up tips from more experienced SOHO comet

hunters then go to http://groups.yahoo.com/group/sohohunter/.



Also, a tutorial on SOHO comet hunting techniques has been

provided by S. Hoenig at http://www.sungrazer.org.



Derek

Possible small faint Kreutz in C3 images of 2003/02/23



1024x1024 gifs.  0,0 Top-Left.



Visible only in 4 or 5? frames and with 200% magnification. 



The only reasons that have promted me to report this small faint

object is that both its path and velocity look very convincing.

Also, the object diminishes in brightness over sucessive frames.



2003/02/23



12:42  366, 570

13:42  372, 566

14:18  377, 563

14:42  379, 561

15:18  384, 559 ? Almost at the background noise level.



Very hard to see at normal viewing. A step up in magnification is

required to see it.



- Dave

Possible Kreutz comet in a real-time C3 images now.



The object is faint, and visible in 3 consecutive images

on 2003/02/28 from 06:18 to 07:42 UT. 



Approximate positions measured from the top-left corner

of a 1024x1024 frames : 

        col, row

06:18  220,672

06:42  224,669

07:42  234,661



Xavier Leprette

Possible Kreutz comet in a real-time C3 images now.

UPDATE : confirmation about my previous message



The object is faint, and visible in 5 consecutive images

on 2003/02/28 from 06:18 to 08:18 UT. 



Approximate positions measured from the top-left corner

of a 1024x1024 frames : 

        col, row

05:42  214,677

06:18  220,672

06:42  224,669

07:42  234,661

08:18  241,657



Xavier Leprette

Possible comet in C3 at 20030228_0642 UT



 Object farther behind. Xaiver's



****** NOTE ******

x-coordinates are probably correct, 

but y-coordinates may be off by

several pixels. 

0,460 in lower left corner



LASCO C3 IMAGES - 1024 x 1024



Date      Time   X   Y

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

20030228  0642  143 203

          0742  147 198

          0818  151 196

          0842  154 192

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

Michael Boschat

DISREGARD MY POST OF Feb 28 2003 07:12:21



MB

Possible comet in near-realtime C3, 1024x1024, 0,0 uppper left:



Starts out dim and diffuse and brightens up, motion is consistent with a comet.





20030301_0242_c3.gif   -   322, 581

20030301_0218_c3.gif   -   311, 586

20030301_0142_c3.gif   -   300, 591



Waiting for further images.



David Johnson