June 2023 (and other) Confirmations
UPDATE Aug 30, 2023: I was wrong about 4738/4739 -- Worachate reported it first in C3, so I have updated SOHO-4739
Hi All,
Here are confirmations from May 2023 and archive reports for the year 2001.
Soho# Date/Time of Post Discoverer Tel Group Images of... ===================================================================== 4725 Oct07,22 05:48:14 Z.Chen C2 Meyer Feb18,02 4726 Oct24,22 01:21:19 J.Ruan,W.Zhou C2 Kreutz May23,02 4727 Oct24,22 01:23:35 J.Ruan,W.Zhou C2 Kreutz May31,02 4728 Sep29,22 07:00:12 Z.Chen C2 Kracht Sep15,02 4729 Sep26,22 09:02:51 Z.Chen C2 Kreutz Oct08,02 4730 Jun07,23 09:24:49 J.Ruan,W.Zhou C2 Kreutz Mar28,02 4731 Jun03,23 04:16:48 H.Tan C2 Kreutz Jun03,23 4732 Jun06,23 19:20:54 J.Ruan C2 Kreutz Jun06,23 4733 Jun07,23 17:50:27 H.Tan C2 Kreutz Jun07,23 4734 Jun07,23 22:50:22 H.Tan C2 Kreutz Jun08,23 4735 Jun08,23 08:25:38 H.Tan C2 Kreutz Jun08,23 4736 Jun08,23 13:30:59 W.Boonplod C3,C2,C2A Kreutz Jun08-11,23 4737 Jun09,23 13:34:48 H.Tan C3,C2 Kreutz Jun09-10,23 4738 Jun10,23 05:01:42 J.Ruan C3,C2 Kreutz Jun10,23 4739 Jun10,23 06:57:31 W.Boonplod C3,C2 Kreutz Jun10,23 4740 Jun11,23 10:06:59 R.Biros C2 Kreutz Jun11,23 4741 Jun11,23 21:52:31 Pickard,Tan C2 Kreutz Jun12,23 4742 Jun12,23 02:32:58 Z.Xu C2 Kreutz Jun12,23 4743 Jun12,23 03:40:53 Z.Yang C2 Kreutz Jun12,23 4744 Jun12,23 10:26:04 J.Ruan C2 Kreutz Jun12,23 4745 Jun13,23 09:47:48 J.Ruan C2 Kreutz Jun13,23 4746 Jun13,23 09:47:48 W.Boonplod C2 Meyer Jun14-15,23 4747 Jun16,23 16:37:19 W.Boonplod C3,C2 Kreutz Jun16-17,23 4748 Jun18,23 21:05:41 W.Boonplod C2 Meyer Jun18-19,23 4749 Jun19,23 01:51:22 Z.Yang C2 Kreutz Jun19,23 4750 Jun19,23 01:52:23 Z.Yang C2 Kreutz Jun19,23 4751 Jun19,23 11:52:46 Z.Yang C2 Meyer Jun19,23 4752 Jun19,23 23:51:04 Z.Yang C2 Kreutz Jun20,23 4753 Jun23,23 22:26:23 Z.Yang C2 Kreutz Jun24,23 4754 Jun27,23 14:36:43 W.Boonplod C3,C2 Kreutz Jun27-28,23 4755 Jun29,23 08:07:30 W.Boonplod C3,C2 Kreutz Jun29,23 4756 Jun29,23 12:54:20 W.Boonplod C2 Meyer Jun29,23 4757 Jun07,23 09:26:53 J.Ruan,W.Zhou C2 Kreutz Mar22,03 4758 Sep25,22 03:12:24 J.Ruan,W.Zhou C2 Kreutz May18,03 4759 Sep30,22 13:04:44 J.Ruan,W.Zhou C2 Kreutz Oct01,03 4760 Sep30,22 21:22:54 J.Ruan,W.Zhou C2 Kreutz Oct03,03 4761 Oct02,22 04:19:27 J.Ruan,W.Zhou C2 Kreutz Nov09,03 4762 Mar25,23 02:50:03 H.Tan C2 Meyer Nov27,03 4763 Oct03,22 02:16:57 J.Ruan,W.Zhou C2 Kreutz Dec07,03 --
So here we have confirmations for June 2023, and archive reports for 2002 and 2003. A few things to note...
I could not confirm Oct24,22 01:25:42 (J.Ruan,W.Zhou). Jiangao's report report_jr_20230608091409 was the same as SOHO-4735, and Worachate's report report_wb_20230610065731 was the same as SOHO-4738. Also, Jiangao's C2 Kreutz from report_jr_20230626201847 will have to be an x-comet, as we have a large data gap and I can only see the comet in three images (we need at least five).
I'm quite shocked that no one had ever reported SOHO-4757 (e.g., x,y=177,83 @ 08:30UT) but I cannot find any trace of it in the reports archive, so it must be new. It really was very bright for an unreported comet. It's definitely not SOHO-592, which was in C2 a day earlier.
Also, we now have a few more PSP comets that I can confirm!
PSP# Report Date/Time Discoverer(s) Tel Group Images of... ========================================================================== 0001 Sep25,22 02:32am P.Berrett WISPR-I Kreutz May29,22 0002 N/A K.Battams WISPR-I Kreutz Sep01-02,22 0003 N/A K.Battams WISPR-I Kreutz Sep02,22 0004 N/A K.Battams WISPR-I Kreutz Sep01,22 0005 Feb11,23 11:25pm P.Berrett WISPR-I Kreutz Nov18,21 0006 May13,23 04:54am P.Berrett WISPR-I/O NonGrp Dec11,22 0007 Jul12,23 10:03am K.Battams WISPR-I Kreutz Mar12,23 0008 Jul16,23 04:41pm R.Biros WISPR-I/C3/H1A NonGrp Dec06-07,22 0009 Jul28,23 04:40pm R.Biros WISPR-I Kreutz Apr25,21 0010 Jul28,23 04:40pm R.Biros WISPR-I Kreutz Apr25,21 0011 Jul24,23 08:09am R.Biros WISPR-I Kreutz Nov17,21 0012 Jul30,23 05:10pm R.Biros WISPR-I Kreutz Feb21,22
Many congratulations to Rafal for finding these! He also spotted the Meyer-group comet SOHO-4388 in the WISPR-I data from 2022-02-21. Much like the Kreutz comets, the Meyer orbit is only in the WISPR field of view for a few days early in each encounter, with the comets moving almost vertically along the lower-left hand edge of the field of view.
I am still quite sure that a number of new comets exist in the WISPR data. I think most people have focussed on the first few days of each orbit when the Kreutz stream is in the field of view and the exposure times are reasonably long. As the spacecraft approaches perihelion, we have to reduce the exposure time, so the images are perhaps not as good for comet hunting. BUT... as PSP moves away from perihelion, the exposure time does go back up. The Kreutz stream is not in the field of view, but otherwise the camera is still taking very good images of the near-Sun region, and I would not be at all surprised for non-group objects to be in there.
As always, email with questions, comments, corrections, etc.
Karl