SOHO Comets 2011

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
2004 04/01/2011     C2 K  Bo Zhou				January 4
2005 07/01/2011 An  C3 K  Zhijian Xu				January 7
2006 13/01/2011     C3 K  Masanori Uchina			January 13
2007 13/01/2011 An  C3 K  Alexander Godunov (1)			January 13
2008 15/01/2011     C2 Y  Masanori Uchina			January 15
2009 15/01/2011     C3 K  Shishir Deshmukh, Arkadiusz Kubczak	January 15
2010 16/01/2011     C3 K  Masanori Uchina			January 16
2011 16/01/2011     C3 K  Masanori Uchina			January 16
2012 19/01/2011     C3 K  Michal Kusiak, Masanori Uchina	January 19
2013 21/01/2011     C3 K  Bo Zhou, Shishir Deshmukh		January 21
2014 23/01/2011     C3 K  Michal Kusiak, Hanjie Tan		January 23
2015 23/01/2011     C2 O  Rainer Kracht				January 23
2016 24/01/2011     C3 K  Michal Kusiak, Masanori Uchina	January 24
2017 30/01/2011     C3 K  Zhijian Xu				January 30
2018 01/02/2011 B1  C3 K  Michal Kusiak				February 1
2019 02/02/2011     C3 K  Alexander Godunov			February 2
2020 04/02/2011     C3 K  Sergei Schmalz (1)			February 4
2021 05/02/2011     C3 K  Zhijian Xu				February 5
2022 09/02/2011     C3 O  Bo Zhou				February 9
2023 13/02/2011     C3 K  Masanori Uchina			February 13
2024 16/02/2011     C3 D  Rob Matson				February 16
2025 22/02/2011     C3 K  Masanori Uchina			February 22
2026 23/02/2011     C3 K  Szymon Liwo (1)			February 23
2027 24/02/2011     C3 K  Hua Su				February 25
2028 26/02/2011     C3 K  Bo Zhou				February 26
2029 26/02/2011     C3 K  Alexander Godunov			February 26
2030 27/02/2011     C2 Y  Masanori Uchina			February 27
2031 27/02/2011     C3 K  Zhijian Xu				February 27
2032 02/03/2011     C3 K  Shishir Deshmukh			March 2
2033 09/03/2011 E1  C3 R  Rainer Kracht				March 9
2034 12/03/2011     C3 K  Shishir Deshmukh, Bo Zhou		March 12
2035 12/03/2011     C2 O  Rainer Kracht				March 13
2036 22/03/2011     C3 K  Rafal Reszelewski			March 22
2037 23/03/2011     C2 K  Bo Zhou				March 25
2038 29/03/2011     C2 K  Shishir Deshmukh			March 29
2039 06/04/2011     C3 K  Masanori Uchina			April 6
2040 08/04/2011     C3 K  Zhijian Xu, Szymon Liwo		April 8
2041 14/04/2011     C2 K  Masanori Uchina			April 14
2042 15/04/2011     C2 K  Arkadiusz Kubczak			April 15
2043 18/04/2011     C2 Y  Szymon Liwo				April 18
2044 18/04/2011     C2 K  Michal Kusiak				April 18
2045 18/04/2011     C2 K  Bo Zhou				April 18
2046 19/04/2011     C2 Y  Michal Kusiak				April 19
2047 19/04/2011     C2 K  Jiangao Ruan				April 20
2048 19/04/2011     C2 K  Zhijian Xu				April 20
2058 27/02/2011     C3 K  Bo Zhou				April 20
2049 21/04/2011     C2 K  Szymon Liwo				April 21
2050 23/04/2011     C2 K  Zhijian Xu				April 23
2051 23/04/2011     C2 K  Michal Kusiak				April 24
2052 25/04/2011     C2 K  Masanori Uchina			April 25
2053 25/04/2011     C2 K  Bo Zhou				April 25
2054 25/04/2011     C2 K  Bo Zhou				April 25
2055 25/04/2011     C2 K  Jiangao Ruan, Zhijian Xu		April 25
2056 26/04/2011     C2 K  Alexander Godunov			April 26
2057 28/04/2011     C2 K  Michal Kusiak, Szymon Liwo		April 28
2059 30/04/2011     C2 Y  Zhijian Xu				April 30
2060 01/05/2011     C2 K  Zhijian Xu				May 1
2061 05/05/2011     C2 K  Masanori Uchina			May 5
2062 09/05/2011     C3 K  Sergey Shurpakov			May 9
2063 10/05/2011     C2 K  Michal Kusiak				May 10
2064 12/05/2011     C2 K  Keith Nakonechny			May 12
2065 13/05/2011     C3 K  Masanori Uchina			May 13
2066 14/05/2011     C2 K  Szymon Liwo				May 14
2067 14/05/2011     C3 K  Zhijian Xu				May 14
2068 14/05/2011     C2 O  Masanori Uchina			May 14
2069 18/05/2011     C3 K  Alexander Godunov			May 18
2070 18/05/2011     C2 K  Rainer Kracht, Sergei Schmalz		May 18
2071 20/05/2011     C2 D  Masanori Uchina			May 20
2072 20/05/2011     C3 K  Sergey Shurpakov			May 20
2073 21/05/2011     C2 K  Michal Kusiak, Zhijian Xu		May 21
2074 21/05/2011     C2 K  Szymon Liwo				May 21
2075 21/05/2011     C2 K  Bo Zhou				May 21
2076 21/05/2011     C2 K  Bo Zhou				May 21
2077 22/05/2011     C2 K  Sergei Schmalz			May 22
2078 22/05/2011     C2 K  Sergei Schmalz, Szymon Liwo		May 22
2079 24/05/2011     C2 K  Bo Zhou				May 24
2080 25/05/2011     C2 Y  Rainer Kracht				May 25
2081 26/05/2011     C2 K  Michal Kusiak, S Schmalz, S Shurpakov	May 26
2082 26/05/2011     C2 K  Michal Kusiak				May 26
2083 30/05/2011     C2 Y  Michal Kusiak				May 30
2084 01/06/2011     C2 K  Zhijian Xu				Jun 1
2085 02/06/2011     C3 K  Masanori Uchina			Jun 2
2086 04/06/2011     C3 K  Alexander Godunov			Jun 4
2087 05/06/2011     C2 K  Sergei Schmalz			Jun 6
2088 06/06/2011     C3 K  Alexander Godunov			Jun 6
2089 06/06/2011     C3 K  Masanori Uchina			Jun 6
2090 06/06/2011     C2 K  Michal Kusiak, Sergei Schmalz		Jun 6
2091 07/06/2011     C2 K  Michal Kusiak				Jun 7
2092 07/06/2011     C2 K  Bo Zhou				Jun 8
2093 09/06/2011     C2 K  Sergei Schmalz			Jun 9
2094 09/06/2011     C2 K  Michal Kusiak				Jun 9
2095 09/06/2011     C2 K  Zhijian Xu, M Uchina, S Schmalz	Jun 9
2096 10/06/2011     C2 D  Rainer Kracht				Jun 10
2097 14/06/2011     C3 K  Masanori Uchina			Jun 15
2098 15/06/2011     C3 K  Szymon Liwo				Jun 15
2099 15/06/2011     C2 K  Zhijian Xu				Jun 15
2100 18/06/2011     C2 K  Michal Kusiak				Jun 18
2101 20/06/2011     C2 K  Sergei Schmalz			Jun 20
2102 20/06/2011     C2 K  Bo Zhou				Jun 20
2103 22/06/2011     C2 K  Masanori Uchina			Jun 22
2104 28/06/2011     C2 K  Sergei Schmalz			Jun 28
2105 28/06/2011     C3 K  Zhijian Xu, Sergey Shurpakov		Jun 28
XC80 27/06/2011     C2 K  Bo Zhou				Jun 29
2106 30/06/2011     C2 O  Rainer Kracht				Jun 30
2107 04/07/2011 N3  C3 K  Masanori Uchina			Jul 04
P    04/07/2011     C3 K  Michal Kusiak				Jul 04 = 2107 ?
2108 04/07/2011     C2 K  Bo Zhou				Jul 06
2109 08/07/2011     C3 K  Sergey Shurpakov			Jul 08
2110 11/07/2011     C3 Y  Masanori Uchina			Jul 11
2111 12/07/2011     C3 K  Zhijian Xu				Jul 12
2112 13/07/2011     C3 K  Sergei Schmalz, Michal Kusiak		Jul 13
2113 14/07/2011     C2 Y  Sergei Schmalz			Jul 14
2114 16/07/2011     C2 Y  Zhijian Xu				Jul 16
2115 17/07/2011     C3 D  Alan Watson				Jul 17
2116 26/07/2011     C3 K  Peiyuan Sun				Jul 26
2117 01/08/2011     C3 K  Alexander Godunov			Aug 1
2118 03/08/2011     C3 K  Zhijian Xu, S Liwo, S Shurpakov	Aug 3
2119 04/08/2011     C3 K  Zhijian Xu				Aug 4
2120 06/08/2011     C3 K  Masanori Uchina			Aug 6
2121 09/08/2011     C3 K  Sergey Shurpakov			Aug 9
2122 09/08/2011     C3 K  Alexander Godunov			Aug 9
P    11/08/2011     C3 K  Masanori Uchina			Aug 11 Withdrawn
2123 13/08/2011     C3 K  Sergey Shurpakov			Aug 13
2124 16/08/2011     C3 K  Bo Zhou				Aug 16
2125 17/08/2011     C3 K  Bo Zhou				Aug 18
2126 19/08/2011     C3 K  Szymon Liwo, Michal Kusiak, Z Xu	Aug 19
2127 19/08/2011     C3 K  Michal Kusiak				Aug 19
2128 21/08/2011     C3 K  Zhijian Xu				Aug 21
2130 24/08/2011     C3 K  Masanori Uchina			Aug 24
2129 23/08/2011     C3 K  Bo Zhou				Aug 24
2131 25/08/2011     C3 K  Shishir Deshmukh			Aug 25
2132 31/08/2011     C3 K  Sergey Shurpakov			Aug 31
2133 01/09/2011     C3 K  Michal Kusiak				Sep 01
2134 04/09/2011 Q4  SW O  Rob Matson, Vladimir Bezugly		Sep 05
2135 04/09/2011     C3 K  Michal Kusiak, Zhijian Xu		Sep 05
     06/09/2011     C2 R  Bo Zhou				Sep 06 = 1999 R1
2136 07/09/2011     C3 K  Zhijian Xu, Sergei Schmalz		Sep 07
2137 07/09/2011     C3 K  Sergei Schmalz			Sep 07
2138 13/09/2011     C3 K  Michal Kusiak, Sergei Schmalz		Sep 13
2139 14/09/2011     C3 K  Bo Zhou				Sep 14
2140 14/09/2011     C3 K  Bo Zhou				Sep 16
2141 14/09/2011     C2 Y  Bo Zhou                               Sep 16
2142 21/09/2011     C3 O  Bo Zhou				Sep 21
2143 30/09/2011     C3 K  Kusiak, Zhou, Liwo, Xu		Sep 30
2144 02/10/2011     C2 K  Michal Kusiak				Oct 02
2145 03/10/2011     C3 K  Zhijian Xu				Oct 03
2146 06/10/2011     C3 K  Bo Zhou				Oct 08
2147 11/10/2011     C3 K  Sergey Shurpakov                      Oct 11
     11/10/2011     C2 K  Sergei Schmalz			Oct 11 = 2147
2148 11/10/2011     C2 K  Bo Zhou				Oct 11
2149 12/10/2011     C3 K  Michal Kusiak, Marek Kaluzny		Oct 12
2150 13/10/2011     C2 K  Bo Zhou, Masanori Uchina		Oct 13
2151 16/10/2011     C2 K  Sergei Schmalz			Oct 17
2152 16/10/2011     C3 K  Zhijian Xu				Oct 16
2153 16/10/2011     C2 K  Sergei Schmalz			Oct 17
2154 18/10/2011     C3 K  Michal Kusiak, S Schmalz, M Uchina	Oct 18
2155 21/10/2011     C3 K  Michal Kusiak				Oct 21
2156 22/10/2011     C2 K  Masanori Uchina			Oct 22
2157 27/10/2011     C3 K  Michal Kusiak				Oct 27
2158 29/10/2011     C2 K  Sergei Schmalz			Oct 29
2159 29/10/2011     C3 K  Szymon Liwo				Oct 29
2160 30/10/2011     C3 K  Zhijian Xu				Oct 30
2161 30/10/2011     C2 K  Michal Kusiak				Oct 30
2162 30/10/2011     C2 K  Michal Kusiak				Oct 30
2163 31/10/2011     C3 K  Zhijian Xu, Masanori Uchina		Oct 31
2164 01/11/2011     C2 K  Bo Zhou				Nov 01
2165 01/11/2011     C3 K  Rafal Reszelewski			Nov 01
2166 02/11/2011     C2 K  Zhijian Xu				Nov 02
2167 05/11/2011     C2 K  Michal Kusiak, Peiyuan Sun		Nov 05
2168 06/11/2011     C2 K  Michal Kusiak, Sergei Schmalz, Z Xu	Nov 06
2169 07/11/2011     C2 K  Sergei Schmalz			Nov 07
2170 09/11/2011     C2 K  Sergei Schmalz			Nov 09
2171 13/11/2011     C2 K  Michal Kusiak				Nov 13
2172 14/11/2011     C2 K  Bo Zhou				Nov 14
2173 15/11/2011     C2 K  Sergei Schmalz			Nov 15
2174 16/11/2011     C2 K  Szymon Liwo				Nov 16
2175 16/11/2011     C3 K  Bo Zhou				Nov 16
2176 17/11/2011     C3 K  Zhijian Xu				Nov 17
2177 17/11/2011     C3 K  Zhijian Xu				Nov 17
2178 17/11/2011     C2 K  Michal Kusiak				Nov 17
2179 21/11/2011     C2 K  Sergei Schmalz			Nov 21
2180 21/11/2011     C2 K  Sergei Schmalz			Nov 21
2181 22/11/2011     C3 K  Sergei Schmalz			Nov 22
2182 25/11/2011     C2 O  Szymon Liwo				Nov 25
2183 28/11/2011     C2 K  Sergei Schmalz			Nov 28
2184 29/11/2011     C2 K  Sergei Schmalz			Nov 29
XC   29/11/2011     C2 K  Sergei Schmalz			Nov 29
2185 29/11/2011     C2 K  Masanori Uchina			Nov 29
2186 30/11/2011     C3 K  Sergei Schmalz, Sergey Shurpakov	Nov 30
2187 01/12/2011     C2 K  Szymon Liwo, Michal Kusiak		Dec 01
2188 01/12/2011     C2 K  Michal Kusiak				Dec 01
2189 03/12/2011     C2 K  Michal Kusiak, S Liwo, Salil Mulye	Dec 03
2190 06/12/2011     C2 K  Sergei Schmalz			Dec 06
2191 07/12/2011     C3 K  Jiangao Ruan				Dec 07
2192 07/12/2011     C3 K  Zhijian Xu				Dec 07
2193 08/12/2011     C2 K  Zhijian Xu				Dec 08
2194 09/12/2011     C2 K  Bo Zhou				Dec 09
2195 09/12/2011     C2 K  Sergei Schmalz			Dec 09
2196 11/12/2011     C2 K  Sergei Schmalz, Jiangao Ruan		Dec 11
2197 11/12/2011     C2 K  Zhijian Xu, Jingjun Liu		Dec 11
C    11/12/2011     C3 K  Rob Matson				Dec 11 = 2197
2198 13/12/2011     C3 K  Szymon Liwo, Salil Mulye		Dec 13
2199 13/12/2011     C3 K  Bo Zhou				Dec 13
2200 13/12/2011     C2 K  Bo Zhou				Dec 13
2201 13/12/2011     C3 K  Bo Zhou				Dec 13
C    14/12/2011     C2 K  Rafal Reszelewski 			Dec 14 = 2201
2202 14/12/2011     C2 K  Sergei Schmalz			Dec 14
2203 14/12/2011     C3 K  Zhijian Xu, Rafal Reszelewski		Dec 14
2204 14/12/2011     C2 K  Bo Zhou				Dec 15
2205 15/12/2011     C3 K  Sergei Schmalz			Dec 15
2206 16/12/2011     C3 K  Bo Zhou				Dec 16
2207 16/12/2011     C2 K  Szymon Liwo				Dec 16
2208 16/12/2011     C2 Y  Sergei Schmalz			Dec 16
2209 18/12/2011     C3 K  Michal Kusiak				Dec 18
2210 20/12/2011     C2 K  Szymon Liwo				Dec 20
2211 25/12/2011     C3 K  Bo Zhou				Dec 25
2212 25/12/2011     C2 K  Sergei Schmalz			Dec 25
2213 25/12/2011     C2 K  Sergei Schmalz			Dec 25
2214 26/12/2011     C3 K  Sergei Schmalz			Dec 26
2215 26/12/2011     C2 K  Sergei Schmalz			Dec 26
2216 28/12/2011     C3 K  Rafal Reszelewski			Dec 28
2217 31/12/2011     C2 K  Sergei Schmalz			Dec 31

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:

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