SOHO Comets 2021

The table list the provisional number for the comet, the day (UT) and month of the first (discovery) observation, the year and comet identification, the LASCO or STEREO coronagraph on which it was discovered, the discoverer (additional names are independent discoverers), with the number of their discoveries given in brackets following the name, and finally the date of discovery.

SOHO Observed   Des C  G  Observers							Discovered
4116 02/01/2021     C3 K  Michal Biesiada						January 2
4117 05/01/2021     C3 K  Worachate Boonplod						January 5
4118 11/01/2021     C2 Y  Worachate Boonplod						January 11
4119 16/01/2021     C3 K  Worachate Boonplod						January 16
4120 17/01/2021     C3 O  Worachate Boonplod						January 17
4128 06/01/2021     C2 Y  Robert Pickard						January 21
4121 21/01/2021     C3 K  Masanori Uchina						January 21
4122 21/01/2021     C2 O  Worachate Boonplod						January 21
4127 31/12/2019     C2 Y  Peter Berrett							January 22
4123 25/01/2021     C3 K  Peiyuan Sun							January 25
4124 24/02/2017     C2 O  Peter Berrett							January 28
4125 21/07/2017     C2 Y  Peter Berrett							January 28
     02/02/2021     C3 O  Parth Bhagat							February 2
     08/02/2021     C3 D  Worachate Boonplod						February 8
     11/02/2021     C3 K  Worachate Boonplod						February 11
     11/02/2021     C3 K  Worachate Boonplod						February 11
     11/02/2021     C3 K  Worachate Boonplod						February 11
     12/02/2021     C3 K  Worachate Boonplod						February 12
     14/02/2021     C3 O  Worachate Boonplod						February 14
     14/02/2021     C3 K  Szymon Liwo							February 14
     23/02/2021     C2 O  Peter Berrett							February 23
     24/02/2021     C3 K  Worachate Boonplod						February 24
     25/02/2021     C3 K  Worachate Boonplod						February 25
     25/02/2021     C3 K  Worachate Boonplod						February 25
     15/08/2018     C3 K  Trygve Prestgard						February 26
     26/02/2021     C3 K  Worachate Boonplod						February 26
C    19/02/2021 D1  SW O  Michael Mattiazzo						February 28
     04/03/2021     C3 K  Worachate Boonplod						March 4
     06/03/2021     C3 K  Michal Biesiada						March 6
     08/03/2021     C3 K  Worachate Boonplod						March 8
     11/03/2021     C3 K  Sergey Shurpakov						March 11
     13/03/2021     C3 K  Sergey Shurpakov						March 13
C    13/03/2021     C2 K  Masanori Uchina						March 15
     20/03/2021     C3 K  Worachate Boonplod						March 20
     21/03/2021     C2 Y  Worachate Boonplod						March 21
     23/03/2021     C3 K  Worachate Boonplod						March 23
     24/03/2021     C3 K  Peiyuan Sun, Michal Biesiada					March 24
     26/03/2021     C2 K  Worachate Boonplod						March 26
     03/04/2018     C3 K  Trygve Prestgard						March 27
     28/03/2021     C2 K  Szymon Liwo							March 28
     29/03/2021     C3 K  Peiyuan Sun							March 29
     30/03/2021     C3 K  Worachate Boonplod						March 30
     30/03/2021     C3 K  Worachate Boonplod						March 30
     01/04/2021     C2 K  Rafal Biros							April 1
     02/04/2021     C3 K  Worachate Boonplod						April 1
     01/04/2021     C2 K  Masanori Uchina							April 2
     01/04/2021     C2 K  Masanori Uchina							April 2
The column headed Des is the half month or other designation of the comet. The column headed C gives the SOHO instrument (C2 or C3 for the LASCO coronagraphs, SW for SWAN, T1 or T2 for STEREO) that the comet was discovered in. The column headed G indicates if it is a provisional member of the Kreutz group (K), Meyer group (Y), Marsden group (D), Kracht (R) or other comet (O). P in the SOHO number column indicates the discovery is pending, C indicates that it is confirmed, but not yet numbered, U indicates that is was not confirmed, X that it was confirmed, but there were insufficient observations.

Note that my observer count also includes X/ comets which are not counted as confirmed comets by the SOHO team. Where two or more people report discoveries nearly simultaneously, up to the first three observers are credited here. Where discoverers are clearly not following the SOHO or BAA Comet Section guidelines, they are not credited here at all. If initial reports don't include sufficient positions others may also be credited.

Official milestones:
Robert Pickard    :    First comet

It is possible that there are further comets to be found in the archival data, most likely non-group comets, but there may still be some Kreutz comets.


Published by Jonathan Shanklin. Jon Shanklin - jds@ast.cam.ac.uk