SOHO Comets 2020

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
3952 04/01/2020     C2 R  Peter Berrett							January 4
3890 13/01/2020     C3 K  Worachate Boonplod						January 13
3941 20/06/2013     C2 Y  Peter Berrett							January 18
3942 10/12/2013     C2 Y  Peter Berrett							January 18
3943 06/06/2014     C2 R  Peter Berrett							January 19
3891 19/01/2020     C3 K  Masanori Uchina						January 20
3892 20/01/2020     C3 K  Worachate Boonplod						January 20
3893 23/01/2020     C2 O  Worachate Boonplod						January 23
3894 29/01/2020     C3 K  Worachate Boonplod						January 29
3946 31/01/2018     C2 O  Peter Berrett							January 29
3895 31/01/2020     C2 Y  Masanori Uchina						January 31
3945 19/02/2016     C2 O  Peter Berrett							January 31
3896 01/02/2020     C3 K  Worachate Boonplod						February 1
3940 14/06/2012     C2 Y  Peter Berrett							February 3
3897 05/02/2020     C3 K  Worachate Boonplod						February 5
3939 29/01/2011     C2 Y  Peter Berrett							February 5
3898 07/02/2020	    C2 K  Worachate Boonplod						February 7
3899 08/02/2020     C3 K  Masanori Uchina						February 8
3900 09/02/2020     C3 K  Worachate Boonplod						February 9
3901 09/02/2020     C3 K  Worachate Boonplod						February 9
3902 10/02/2020     C3 K  Worachate Boonplod						February 10
3938 31/07/2008     C2 Y  Peter Berrett							February 11
3903 13/02/2020     C3 K  Worachate Boonplod						February 13
3904 20/02/2020     C3 K  Worachate Boonplod						February 20
3905 22/02/2020     C3 K  Worachate Boonplod						February 22
3906 25/02/2020     C3 K  Worachate Boonplod						February 25
3907 29/02/2020     C3 K  Worachate Boonplod						March 1
3908 06/03/2020     C3 K  Worachate Boonplod						March 6
3909 08/03/2020     C2 Y  Worachate Boonplod						March 8
3910 08/03/2020     C2 Y  Worachate Boonplod						March 8
3911 10/03/2020     C3 K  Masanori Uchina						March 10
3912 10/03/2020     C3 K  Krzysztof Kida 						March 10
3913 12/03/2020     C3 K  Worachate Boonplod						March 12
3914 12/03/2020     C2 K  Masanori Uchina						March 12
3915 13/03/2020     C3 K  Worachate Boonplod						March 13
3916 14/03/2020     C3 K  Worachate Boonplod						March 15
3917 18/03/2020     C3 K  Michal Kusiak							March 18
3918 23/03/2020     C3 K  Worachate Boonplod						March 23
3919 23/03/2020     C2 K  Masanori Uchina						March 23
3947 23/03/2018     C2 K  Trygve Prestgard						March 26
3920 26/03/2020     C2 K  Worachate Boonplod						March 26
3921 27/03/2020     C2 Y  Worachate Boonplod						March 27
3948 01/04/2018     C2 K  Trygve Prestgard						March 30
3949 05/04/2018     C2 K  Trygve Prestgard						March 30
3950 18/04/2018     C2 K  Trygve Prestgard						March 30
3951 28/04/2018     C2 K  Trygve Prestgard						March 30
3922 04/04/2020     C2 K  Krzysztof Kida						April 4
3923 04/04/2020     C3 K  Szymon Liwo							April 4
3924 06/04/2020     C2 K  Worachate Boonplod						April 6
3925 09/04/2020     C2 K  Worachate Boonplod, Masanori Uchina				April 9
3926 10/04/2020     C2 K  Worachate Boonplod						April 10
3932 01/04/2020 F8  SW O  Michael Mattiazzo						April 10
3927 10/04/2020     C3 K  Worachate Boonplod, Masanori Uchina				April 11
3953 11/04/2020     C3 K  Worachate Boonplod						April 11
3928 16/04/2020     C2 K  Masanori Uchina						April 16
3929 17/04/2020     C3 K  Krzysztof Kida						April 17
3930 17/04/2020     C2 K  Michal Kusiak							April 17
3931 17/04/2020     C2 Y  Worachate Boonplod						April 17
3933 21/04/2020     C2 K  Zhijian Xu							April 21
3937 22/04/2020     C3 K  Zhijian Xu							April 22
1952 12/11/2010     C2 Y  Peter Berrett							April 23 
3944 27/03/2015     C2 K  Trygve Prestgard						April 23
     29/01/2011     C2 Y  Peter Berrett							April 24
3934 25/04/2020     C2 K  Zheng Cao							April 25
3935 27/04/2020     C2 K  Michal Kusiak							April 27
3936 29/04/2020     C2 K  Worachate Boonplod						April 29
3954 01/05/2020     C2 K  Krzysztof Kida						May 1
3955 02/05/2020     C2 K  Trygve Prestgard						May 2
3956 08/05/2020     C2 K  Worachate Boonplod						May 8
3957 09/05/2020     C2 K  Worachate Boonplod						May 10
3958 10/05/2020     C2 K  Worachate Boonplod						May 10
3959 10/05/2020     C2 K  Masanori Uchina						May 10
3960 10/05/2020     C2 K  Masanori Uchina						May 10
4039 18/01/2015     C2 R  Peter Berrett							May 11
4038 18/04/2013     C2 Y  Peter Berrett							May 11
3961 11/05/2020     C2 K  Zhijian Xu							May 11
3962 12/05/2020     C2 K  Worachate Boonplod						May 12
3787 04/10/2012     C2 Y  Peter Berrett							May 13 = Duplicate report
3963 14/05/2020     C3 K  Worachate Boonplod						May 14
XC94 16/05/2020     C2 K  Masanori Uchina						May 16
3964 18/05/2020     C2 K  Masanori Uchina						May 18
3965 19/05/2020     C2 K  Worachate Boonplod						May 19
3966 19/05/2020     C3 K  Masanori Uchina						May 19
3979 19/05/2020     C2 K  Worachate Boonplod						May 19
3967 20/05/2020     C2 K  Masanori Uchina						May 20
3968 21/05/2020 Kn  C3 O  Worachate Boonplod						May 21
3969 22/05/2020     C3 K  Worachate Boonplod						May 22
3970 22/05/2020     C2 Y  Worachate Boonplod						May 22
3971 23/05/2020     C2 K  Worachate Boonplod						May 23
3972 26/05/2020     C2 K  Masanori Uchina						May 28
3973 28/05/2020     C2 K  Worachate Boonplod						May 28
3974 29/05/2020     C2 K  Worachate Boonplod, Michal Biesiada				May 29
3975 29/05/2020     C2 Y  Worachate Boonplod						May 29
3976 30/05/2020     C2 Y  Worachate Boonplod						May 30
3977 31/05/2020     C3 K  Worachate Boonplod						May 31
3978 30/05/2020     C2 K  Worachate Boonplod						May 31
3980 01/06/2020     C2 K  Masanori Uchina						June 1
3981 01/06/2020     C2 K  Worachate Boonplod						June 2
3982 02/06/2020     C2 K  Worachate Boonplod						June 2
3983 03/06/2020     C2 K  Masanori Uchina						June 3
3984 04/06/2020     C3 K  Worachate Boonplod						June 4
3985 06/06/2020     C2 K  Worachate Boonplod						June 6
3986 06/06/2020     C2 K  Masanori Uchina						June 6
3987 06/06/2020     C2 K  Worachate Boonplod						June 6
3988 06/06/2020     C2 K  Trygve Prestgard						June 6
3989 07/06/2020     C2 K  Michal Biesiada						June 7
3990 07/06/2020     C2 K  Masanori Uchina						June 8
3991 08/06/2020     C2 K  Michal Biesiada						June 8
3992 08/06/2020     C2 K  Trygve Prestgard						June 8
3993 09/06/2020     C2 K  Michal Biesiada						June 9
3994 09/06/2020     C2 K  Michal Biesiada						June 9
3995 09/06/2020     C2 K  Worachate Boonplod						June 9
3996 09/06/2020     C2 K  Worachate Boonplod						June 9
3997 09/06/2020     C2 K  Worachate Boonplod						June 9
3998 14/06/2020     C2 K  Michal Biesiada						June 14
3999 15/06/2020     C3 K  Worachate Boonplod						June 15
4000 15/06/2020     C3 K  Trygve Prestgard						June 15
4001 15/06/2020     C2 K  Michal Kusiak, Michal Biesiada				June 15
4002 16/06/2020     C3 K  Michal Biesiada						June 16
4003 16/06/2020     C2 Y  Worachate Boonplod						June 16
4004 16/06/2020     C2 K  Michal Biesiada						June 16
4005 17/06/2020     C2 K  Michal Kusiak, Michal Biesiada				June 17
4006 18/06/2020     C2 K  Masanori Uchina						June 18
C    18/06/2020     C3 O  Worachate Boonplod						June 18 = 249P/LINEAR
4007 19/06/2020     C3 K  Worachate Boonplod						June 19
4008 20/06/2020     C2 Y  Worachate Boonplod						June 20
4009 21/06/2020     C2 K  Masanori Uchina						June 21
4010 20/06/2020     C2 K  Worachate Boonplod						June 21
4043 11/04/2020     C2 Y  Peter Berrett							June 21
4011 21/06/2020     C3 K  Michal Biesiada						June 21
4012 24/06/2020     C3 K  Masanori Uchina						June 24
4013 24/06/2020     C3 K  Worachate Boonplod						June 24
4044 18/07/2008     C2 D  Peter Berrett							June 24
4014 27/06/2020     C3 K  Worachate Boonplod						June 27
4015 28/06/2020     C3 K  Worachate Boonplod						June 28
4016 29/06/2020     C2 K  Masanori Uchina						June 29
4017 29/06/2020     C2 K  Masanori Uchina						June 29
4018 29/06/2020     C2 K  Worachate Boonplod						June 29
XC95 30/06/2020     C2 K  Masanori Uchina						June 30
4019 03/07/2020     C3 K  Worachate Boonplod						July 3
4020 03/07/2020     C3 K  Worachate Boonplod						July 3
4040 02/03/2015     C2 R2 Peter Berrett							July 3
4021 04/07/2020     C3 K  Worachate Boonplod						July 4
4022 04/07/2020     C2 K  Michal Biesiada						July 4
2450 23/01/2013     C2 Y  Peter Berrett							July 4 = Duplicate report
4023 05/07/2020     C3 K  Worachate Boonplod						July 5
4024 05/07/2020     C2 K  Masanori Uchina						July 5
4037 16/02/2012     C2 Y  Peter Berrett							July 6
4025 07/07/2020     C3 K  Worachate Boonplod, Michal Biesiada, Krzysztof Kida		July 7
4026 09/07/2020     C3 K  Michal Biesiada						July 9
4042 05/06/2017     C2 Y  Peter Berrett							July 11
4041 20/06/2015     C2 Y  Peter Berrett							July 11
3940 14/06/2012     C2 O  Peter Berrett							July 12 = Duplicate
4036 21/06/2006     C2 Y  Peter Berrett							July 13
4027 14/07/2020     C3 K  Michal Biesiada						July 14
4028 15/07/2020     C3 K  Worachate Boonplod						July 15
4029 18/07/2020     C3 K  Worachate Boonplod						July 18
4030 21/07/2020     C3 K  Worachate Boonplod						July 21
4031 22/07/2020     C3 K  Masanori Uchina						July 22
4032 25/07/2020     C2 Y  Worachate Boonplod						July 25
4033 27/07/2020     C3 K  Zhijian Xu							July 27
4034 27/07/2020     C3 K  Masanori Uchina						July 28
4035 31/07/2020     C3 K  Worachate Boonplod						July 31
4045 02/08/2020     C3 K  Worachate Boonplod						August 2
4046 06/08/2020 P4A C3 O  Worachate Boonplod						August 6
4047 06/08/2020 P4B C3 O  Worachate Boonplod						August 6
4048 02/08/2020     C2 Y  Peter Berrett							August 7
4049 07/08/2020 P4C C2 O  Masanori Uchina						August 7
4050 11/08/2020     C3 K  Michal Biesiada						August 11
4051 13/08/2020     C3 K  Masanori Uchina						August 13
4052 13/08/2020     C3 K  Masanori Uchina						August 13
4053 17/08/2020     C3 K  Michal Biesiada						August 17
4054 21/08/2020     C3 K  Sergey Shurpakov						August 21
4055 25/08/2020     C2 R  Worachate Boonplod						August 25
4056 25/08/2020     C3 K  Junda Liu, Peiyuan Sun					August 25
4057 29/08/2020     C3 K  Worachate Boonplod						August 29
4058 31/08/2020     C3 K  Peiyuan Sun							August 31
4059 06/09/2020     C3 O  Peiyuan Sun							September 6
4060 09/09/2020     C3 K  Worachate Boonplod						September 9
4061 09/09/2020     C3 K  Peiyuan Sun							September 9
4062 10/09/2020     C3 K  Peiyuan Sun							September 10
4063 13/09/2020     C3 K  Worachate Boonplod						September 13 - Also observed by Parker Solar Probe
4064 13/09/2020     C3 Y  Peiyuan Sun							September 13
4065 15/09/2020     C3 K  Masanori Uchina						September 15
4066 16/09/2020     C3 K  Michal Biesiada						September 16
4067 24/09/2020     C3 K  Worachate Boonplod						September 24
4068 27/09/2020     C3 K  Sergey Shurpakov						September 27
4069 29/09/2020     C3 K  Peiyuan Sun, Sergey Shurpakov					September 29
4070 30/09/2020     C3 K  Worachate Boonplod						September 30
4071 02/10/2020     C3 K  Worachate Boonplod						October 2
4072 09/10/2020     C2 K  Worachate Boonplod						October 9
4073 12/10/2020     C2 K  Masanori Uchina						October 12
4074 14/10/2020     C3 K  Worachate Boonplod						October 14
4075 15/10/2020     C3 K  Masanori Uchina						October 15
 120 09/10/2020     H1 K  Karl Battams							October 15
4076 18/10/2020     C2 K  Masanori Uchina						October 18
4077 21/10/2020     C3 K  Worachate Boonplod						October 21
C    22/10/2020     C3 R  Worachate Boonplod						October 22 = 2002 S11 = 2008 R7 = 2802
     23/10/2020     C2 K  Trygve Prestgard						October 23
4078 24/10/2020     C2 Y  Worachate Boonplod						October 24
4079 25/10/2020     C2 K  Worachate Boonplod						October 25
4080 26/10/2020     C2 O  Worachate Boonplod						October 26
4081 28/10/2020     C2 K  Masanori Uchina						October 28
4082 28/10/2020     C2 K  Trygve Prestgard						October 28
     01/11/2020     C3 R  Worachate Boonplod						November 1
     03/11/2020     C2 K  Michal Biesiada						November 3
     04/11/2020     C2 K  Worachate Boonplod						November 4
     05/11/2020     C2 K  Michal Biesiada						November 5
     07/11/2020     C2 K  Michal Biesiada						November 7
     07/11/2020     C2 K  Michal Biesiada						November 7
     08/11/2020     C3 K  Worachate Boonplod						November 8
     09/11/2020     C3 K  Worachate Boonplod						November 9
     09/11/2020     C3 K  Worachate Boonplod						November 9
     11/11/2020     C2 K  Worachate Boonplod						November 11
     13/11/2020     C2 K  Rafal Biros							November 13
     13/11/2020     C3 K  Szymon Liwo							November 13
     14/11/2020     C2 K  Szymon Liwo, Michal Biesiada					November 14
     15/11/2020     C3 K  Michal Biesiada						November 15
     16/11/2020     C3 K  Worachate Boonplod						November 16
     23/11/2020     C3 K  Worachate Boonplod, Szymon Liwo				November 23
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:
SOHO 4000 - Trygve Prestgard
First comet - Rafal Biros

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.  A surprisingly large number of non Kreutz comets have been found by Peter Berrett in what I had thought to be well viewed archive images.


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