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
XC97 02/02/2021     C3 O  Parth Bhagat							February 2
C    08/02/2021     C3 D  Worachate Boonplod						February 8 = P/SOHO (1999 J6)
4129 11/02/2021     C3 K  Worachate Boonplod						February 11
4130 11/02/2021     C3 K  Worachate Boonplod						February 11
U?   11/02/2021     C3 K  Worachate Boonplod						February 11
4131 12/02/2021     C3 K  Worachate Boonplod						February 12
4132 14/02/2021     C3 O  Worachate Boonplod						February 14
4133 14/02/2021     C3 K  Szymon Liwo							February 14
4134 23/02/2021     C2 O  Peter Berrett							February 23
4135 24/02/2021     C3 K  Worachate Boonplod						February 24
4136 25/02/2021     C3 K  Worachate Boonplod						February 25
4137 25/02/2021     C3 K  Worachate Boonplod						February 25
4181 15/08/2018     C3 K  Trygve Prestgard						February 26
4138 26/02/2021     C3 K  Worachate Boonplod						February 26
4139 19/02/2021 D1  SW O  Michael Mattiazzo						February 28
4140 04/03/2021     C3 K  Worachate Boonplod						March 4
4154 06/03/2021     C3 K  Michal Biesiada						March 6
4141 08/03/2021     C3 K  Worachate Boonplod						March 8
4142 11/03/2021     C3 K  Sergey Shurpakov						March 11
4143 13/03/2021     C3 K  Sergey Shurpakov						March 13
4144 13/03/2021     C2 K  Masanori Uchina						March 15
4145 20/03/2021     C3 K  Worachate Boonplod						March 20
4146 21/03/2021     C2 Y  Worachate Boonplod						March 21
4147 23/03/2021     C3 K  Worachate Boonplod						March 23
4148 24/03/2021     C3 K  Peiyuan Sun, Michal Biesiada					March 24
4149 26/03/2021     C2 K  Worachate Boonplod						March 26
4182 04/03/2018     C3 K  Trygve Prestgard						March 27
4150 28/03/2021     C2 K  Szymon Liwo							March 28
4151 29/03/2021     C3 K  Peiyuan Sun							March 29
4152 30/03/2021     C3 K  Worachate Boonplod						March 30
4153 30/03/2021     C3 K  Worachate Boonplod						March 30
4155 01/04/2021     C2 K  Rafal Biros							April 1
4156 02/04/2021     C3 K  Worachate Boonplod						April 1
4157 01/04/2021     C2 K  Masanori Uchina						April 2
4158 01/04/2021     C2 K  Masanori Uchina						April 2
4159 07/04/2021     C3 K  Peiyuan Sun							April 7
4160 07/04/2021     C2 K  Szymon Liwo							April 7
4161 08/04/2021     C2 K  Szymon Liwo							April 8
4162 10/04/2021     C3 K  Worachate Boonplod						April 10
4163 11/04/2021     C3 K  Worachate Boonplod						April 11
4164 13/04/2021     C2 K  Worachate Boonplod						April 13
4165 13/04/2021     C3 K  Szymon Liwo							April 13
4166 14/04/2021     C3 K  Peiyuan Sun							April 14
4167 14/04/2021     C2 K  Masanori Uchina						April 14
4168 15/04/2021     C2 K  Masanori Uchina						April 15
4169 16/04/2021     C2 K  Masanori Uchina						April 16
4170 16/04/2021     C2 K  Masanori Uchina						April 16
4183 17/04/2021     C2 K  Worachate Boonplod						April 17
4171 18/04/2021     C2 K  Szymon Liwo							April 18
4172 19/04/2021     C2 K  Worachate Boonplod						April 20
4173 20/04/2021     C2 K  Szymon Liwo							April 20
4174 21/04/2021     C3 K  Worachate Boonplod						April 21
4175 21/04/2021     C2 K  Szymon Liwo							April 21
4176 24/04/2021     C3 K  Worachate Boonplod						April 24
4177 24/04/2021     C3 K  Worachate Boonplod						April 24
4180 20/02/2006     C2 O  Peter Berrett							April 27
4178 29/04/2021     C3 K  Worachate Boonplod						April 29
4179 30/04/2021     C2 K  Worachate Boonplod						April 30
4184 05/05/2021     C2 K  Worachate Boonplod						May 5
4185 07/05/2021     C3 K  Szymon Liwo							May 7
4186 07/05/2021     C2 K  Trygve Prestgard						May 8
4187 10/05/2021     C2 K  Worachate Boonplod						May 10
4188 11/05/2021     C2 K  Worachate Boonplod						May 11
4189 11/05/2021     C2 Y  Worachate Boonplod						May 11
4190 12/05/2021     C2 K  Masanori Uchina						May 12
4191 13/05/2021     C2 K  Worachate Boonplod						May 13
4192 14/05/2021     C2 O  Michal Biesiada						May 14
4193 15/05/2021     C2 K  Worachate Boonplod						May 15
U    15/05/2021     C2 K  Robert Pickard						May 15
4194 16/05/2021     C2 Y  Robert Pickard						May 16
     13/01/2004     C2 O  Peter Berrett							May 16
4195 22/05/2021     C3 K  Worachate Boonplod						May 22
4196 22/05/2021     C2 O  Trygve Prestgard						May 22
4197 29/05/2021     C2 K  Robert Pickard						May 29
4198 31/05/2021     C2 K  Worachate Boonplod						May 31
4199 03/06/2021     C2 K  Rafal Biros							June 3
4200 02/06/2021     C2 K  Worachate Boonplod						June 3
     16/06/2018     C2 K  Trygve Prestgard						June 3
4201 04/06/2021     C2 K  Robert Pickard						June 4
4202 03/06/2021     C2 K  Masanori Uchina						June 4
4203 03/06/2021     C2 K  Masanori Uchina						June 4
4204 09/06/2021     C2 K  Worachate Boonplod						June 9
4205 09/06/2021     C2 K  Robert Pickard						June 9
4206 10/06/2021     C2 K  Robert Pickard						June 10
4207 10/06/2021     C2 K  Worachate Boonplod						June 10
4208 13/06/2021     C2 K  Michal Biesiada						June 14
4209 13/06/2021     C2 K  Michal Biesiada						June 14
C    12/06/2021     C2 K  Masanori Uchina						June 14 = 4208
4210 14/06/2021     C2 K  Worachate Boonplod						June 14
4211 18/06/2021     C2 K  Masanori Uchina						June 18
4212 20/06/2021     C2 K  Masanori Uchina						June 20
4213 20/06/2021     C3 K  Worachate Boonplod						June 20
4214 21/06/2021     C3 K  Worachate Boonplod						June 21
4215 21/06/2021     C2 K  Robert Pickard						June 21
4216 23/06/2021     C2 K  Masanori Uchina						June 23
4217 25/06/2021     C2 K  Robert Pickard						June 25
4218 25/06/2021     C2 K  Masanori Uchina						June 25
4219 26/06/2021     C2 K  Rafal Biros							June 26
4220 26/06/2021     C3 K  Worachate Boonplod						June 26
4221 25/06/2021     C2 K  Masanori Uchina						June 26
4222 27/06/2021     C2 K  Michal Biesiada						June 27
4223 27/06/2021     C3 K  Michal Biesiada						June 27
C    27/06/2021     C2 K  Peter Berrett							June 27 = 4222
4224 27/06/2021     C2 K  Rafal Biros							June 28
4225 29/06/2021     C2 K  Robert Pickard						June 29
4226 28/06/2021     C2 K  Robert Pickard						June 29
4227 29/06/2021     C2 K  Rafal Biros							June 29
4228 29/06/2021     C2 K  Rafal Biros							June 29
4229 30/06/2021     C2 K  Michal Biesiada						June 30
4230 19/06/2021     C3 K  Worachate Boonplod						June 19
     03/07/2021     C3 K  Worachate Boonplod						July 3
     02/07/2006     C2 K  Trygve Prestgard						July 3
     03/07/2021     C2 O  Worachate Boonplod						July 3
     04/07/2021     C3 K  Worachate Boonplod						July 4
     23/05/2007     C2 K  Robert Pickard						July 4
     23/05/2006     C2 K  Rafal Biros							July 13
     13/07/2021     C3 K  Salil Mulye							July 13
     13/07/2021     C3 O  Worachate Boonplod						July 13
     13/07/2021     C2 Y  Worachate Boonplod						July 13
     14/07/2021     C3 K  Sergey Shurpakov						July 14
     16/07/2021     C3 K  Masanori Uchina						July 16
     08/05/2018     C2 K  Robert Pickard						July 19
     19/04/2001     C2 K  Rafal Biros							July 19
     19/07/2021     C3 K  Worachate Boonplod						July 19
     20/07/2021     C3 K  Worachate Boonplod						July 20
     07/05/2018     C2 K  Robert Pickard						July 23
     14/03/2014     C2 O  Peter Berrett							July 25
     03/10/2019     C2 K  Rafal Biros							July 25
     27/07/2021     C3 K  Worachate Boonplod						July 27
     20/05/2016     C2 K  Robert Pickard						July 28
     23/07/2021     C2 O  Peter Berrett							July 28
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