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  • Members: 83
  • Category: Astronomy
  • Founded: Oct 19, 2006
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Unknow object in STEREO HI1a   Message List  
Reply Message #749 of 1760 |
Gidday all,
After my last noise call i'm a bit reluctant to post this.
It is visible across the complete sequence. Open to opinions

An interesting object moving north and west in Hi1a.

(0,0) upleft image pixvalue x y slice.
13 H1a:20090110_212901_s4h1A 23.6008 965 213 30
14 H1a:20090110_140901_s4h1A 15.0997 964 220 19
15 H1a:20090110_084901_s4h1A 26.7208 964 227 11
16 H1a:20090110_012901_s4h1A 11.5326 966 237 3

kind regards,
Alan Watson

Http://cometal.bigblog.com.au/index.do







Tue Jan 13, 2009 9:42 am

algwat
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Message #749 of 1760 |
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Gidday all, After my last noise call i'm a bit reluctant to post this. It is visible across the complete sequence. Open to opinions An interesting object...
algwat Offline Send Email Jan 13, 2009
9:42 am

Gidday all, these are the positions i get from SAO DS9. rgds alan # Region file format: DS9 version 4.1 # Filename:...
algwat Offline Send Email Jan 13, 2009
7:40 pm

Gidday All, I tried this MPChecker/CMTChecker/NEOChecker/NEOCMTChecker with these positions. 135P/Shoemaker-Levy pops up. Not sure i have done this...
Alan Watson
algwat Offline Send Email
Jan 13, 2009
7:58 pm

... these positions. ... Alan, NEOChecker does not work with space observatories as observing sites, even if you entered appropriate observatory code. The...
Dimitry Chestnov
astroched Offline Send Email
Jan 13, 2009
8:51 pm

Hallo Alan With a perihel time around feb 6 85 P is near this point. best regards Michael ... From: Alan Watson To: stereohunter@yahoogroups.com Sent:...
Michael Jaeger
schmidtcamer... Offline Send Email
Jan 13, 2009
9:25 pm

According to Alan's astrometry, I can assume that the comet is within few hundreths of AU from spacecraft (some 0.04 AU). It is probably a very close fly-by....
Dimitry Chestnov
astroched Offline Send Email
Jan 13, 2009
11:32 pm

Dimitry, ... How did you find that? Alan's astrometry suggest the comet is moving more or less 2.5'/hour... This is pretty similar to what is expected for 85P...
Piotr Guzik
piotrek16 Offline Send Email
Jan 14, 2009
12:16 am

Gidday All, The good news, it's still there. The better news is its turned a corner and is now heading south. The pixel value is getting higher. Could it be in...
Alan Watson
algwat Offline Send Email
Jan 14, 2009
7:50 am

... I tried to compute an orbit from Alan's 3 positions, but the result was wrong due to small observed arch. I computed an orbit for Earth as observing site...
Dimitry Chestnov
astroched Offline Send Email
Jan 14, 2009
9:40 am

... Sorry, the correct value of TP is 2009 Jan 12.41 UT. Dimitry....
Dimitry Chestnov
astroched Offline Send Email
Jan 14, 2009
9:44 am

Final orbit solution: http://geminorum.narod.ru/comets/algwat_hi1a_K091A.txt Regards, Dimitry...
Dimitry Chestnov
astroched Offline Send Email
Jan 14, 2009
11:41 am

... It also may be visible in LASCO C3....
Dimitry Chestnov
astroched Offline Send Email
Jan 14, 2009
10:06 am

... its ... It was probably too faint when it crossed LASCO C3. But HI1B should show it. With these elements: Ecliptic Osculating Elements (J2000.0) at JD...
rainerkracht Offline Send Email Jan 15, 2009
9:19 pm

Gidday Rainer and Dimitry, ... Your last Hi1a positions look good. I have loaded Rainer's orbit details into Starry night. It show the comet crossing STEREO...
Alan Watson
algwat Offline Send Email
Jan 16, 2009
11:00 am

All, In case you were concerned, I am not ignoring this object. This is a very hard target to follow through the images, so it took me a while to get as many...
karlbattams Offline Send Email Jan 16, 2009
2:59 pm

Hi all, I think I have found Alan's comet in HI1B: 20080112 1249 21 255 1329 25 259 1409 29 263 close to the expected positions. Rainer...
Rainer Kracht
rainerkracht Offline Send Email
Jan 16, 2009
4:08 pm

I concur -- it's definitely there in HI1-B. This is very good news! Hopefully Brian can get a good orbit for it. I can follow it to near the end of the day...
karlbattams Offline Send Email Jan 16, 2009
7:11 pm

Following up... I can certainly see it in HI1-B (pretty clearly actually), but my positions do not agree with Rainer's. I get the following: (0,0 upper-left) ...
karlbattams Offline Send Email Jan 16, 2009
9:22 pm

Gidday Karl, Rainer et al, I agree with these positions, lost across stars after this. My Ypos = Karl's 1024-ypos, which is +/- a few pixels to close Rainer's...
Alan Watson
algwat Offline Send Email
Jan 17, 2009
5:00 am

Dear all, MPEC 2009-B10 was issued a short time ago confirming this object. Also included was Alan's HI1-B Kreutz from last year (SECCHI-007). Congrats again...
karlbattams Offline Send Email Jan 17, 2009
6:17 pm

Gidday ALL, Unknown object in STEREO HI1a now has a name C/2009 A1 (STEREO) What great start to the IYA2009 for SOHO and STEREO comets hunters. Many thanks...
Alan Watson
algwat Offline Send Email
Jan 17, 2009
10:18 pm

... Yes, certainly Karl has recovered the comet in HI1B. Congrats to Karl! Perhaps it will be possible now to recover it in earth-based images. Rainer...
Rainer Kracht
rainerkracht Offline Send Email
Jan 17, 2009
10:33 pm

Gidday Rainer et all, ... I see Mr. Michael Jaeger has joined this forum, he is most welcome here, as he is a prolific and talented comet imager. Many of the...
Alan Watson
algwat Offline Send Email
Jan 17, 2009
11:02 pm

Dear Alan For me the comet is below the horizon - sorry best regards MJ ... From: Alan Watson To: stereohunter@yahoogroups.com Sent: Sunday, January 18, 2009...
Michael Jaeger
schmidtcamer... Offline Send Email
Jan 18, 2009
6:13 am

... 2009/ 1/10 JD=2454841.8743200 (ref. J2000.0) File: 2009A01.POS Equat. Pos. & Vel. Ecliptic Oscul. Elements (Gm, km/s)...
rainerkracht Offline Send Email Jan 14, 2009
10:45 pm
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