year obs neg observed comets cmt obs/cmt
------------------------------------------------------------------------------
1987 3 1987P1 1 3
1988 15 1987P1,88A1 2 7.5
1989 2 23P 1 2
1990 11 1989X1,90K1 2 5.5
1991 27 1990K1,P/1991L3,4P,97P,103P 5 5.4
1992 59 1991T2,X2,Y1,92F1,24P,109P 6 9.8
1993 56 1993A1,Q1,24P 3 18.7
1994 63 1993Y1,1994G1,J2,N1,T1,P/1994P1,2P,9P,19P,31P 10 6.3
1995 30 1995Q1,Y1,6P,58P,73P,122P 6 5
1996 144 (1) 1995Y1,O1,1996B1,B2,E1,N1,Q1,R1,22P,29P,45P,57P,67P,73P 17 8.5
81P,118P,126P
1997 80 1995O1,1997D1,J1,J2,43P,46P,78P,81P,103P,118P 10 7.9
1998 101 1997J2,1998H1,K5,M5,P1,U3,U5,21P,52P,55P,69P,78P,88P,93P 15 6.7
103P
1999 113 (1) 1998M5,P1,U5,1999H1,H3,J3,L3,N2,S3,P/1998U3,10P,37P,52P 17 6.6
93P,106P,114P,141P
2000 23 63P,114,141,1999H3,S3,S4,T2,Y1 8 2.9
2001 11 2001A2,Q2,19P 3 3.7
2002 34 2000WM1,2001OG108,RX14,2002O4,O6,V1,X5,153P 8 4.3
2003 16 2001HT50,2002T1,V1,Y1 4 4
2004 40 2001Q4,2002T7,2003K4,2004F4,Q1,Q2 6 6.7
2005 47 9P,2003T4,2004Q1,Q2 4 11.8
2006 42 4P,73P-B,-C,177P,2005E2,2006A1,M4,L1 6 7
2007 44 8P,17P,2006VZ13,2007E1,E2,F1 6 7.3
2008 62 8P,17P,29P,46P,144P,2006W3,OF2,2007W1,2008C1,J1 10 6.1
2009 57 81P,144P,217P,2006W3,2007N3,Q3,2008T2,2009E1,F6 9 6
2010 5 81P,2009K5,103P 3 1
2011 0 0 0
2012 0 0 0
2013 0 0 0
2014 71 2012K1,X1,2013R1,UQ4,2014E2,Q2,Q3 7 10
2015 116 15P,2013X1,2014Q2,S2,2015F3,F4,F5 7 16.6
2016 30 2013US10,X1,2014S2,2015V2,2016A8,U1 6 5
2017 31 2P,41P,45P,62P,2015V2,2017O1 6 5
2018 65 21P,29P,38P,46P,64P,2016R2,2017S3,T1 8 8
2019 80 46P,64P,260P,2017T2,2018N2,W2,Y1 7 11.4
2020 189 29P,88P,156P,2017T2,2018N2,2019U6,Y1,Y4,2020A2,F3,F8,M3,
S3 13 14.5
2021 66 4P,29P,67P,15P,141P,156P,398P,2017K2,2019L3,2020M3,R4,T2,
2021A1,A2,A4 15 4.4
2022 48 19P,29P,67P,104P,2017K2,2019L3,2020V2,2021F1,2022A2,E3 10 4.8
2023 20 2P,12P,62P,103P,2020V2,2022A2,E3,U2 8 0
2024 42 12P,13P,62P,144P,2021S3,2023A3 6 0
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1843 (2) 180 (8.8)
No. ICQ
******************************************************************************
1 C/1987 P1 Bradfield 79 7 19871212-19880113
2 C/1988 A1 Liller 79 11 19880410-19880509
3 23P Brorsen-Metcalf 79 2 19890806-19890810
4 C/1989 X1 Austin 79 4 19900502-19900514
5 C/1990 K1 Levy 79 9 19900823-19910222
6 97P Metcalf-Brewington 79 4 19910115-19910118
7 P/1991 L3 Levy 80 3 19910723-19910823
8a 103P Hartley 2 80,81 6 19910822-19911005
b 104,106 6 19970830-19980221
c 1 20101011
d 3 20230925
9a 4P Faye 80 12 19911004-19911130
b 140 6 20060922-20061030
c 4 20210814-
10 C/1991 Y1 Zanotta-Brewington 86 4 19920103-19920124
11 C/1991 X2 Mueller 86 7 19920224-19920301
12 C/1992 F1 Tanaka-Machholz 83,86 24 19920411-19920626
13 C/1991 T2 Shoemaker-Levy 83,86 12 19920525-19920630
14 109P Swift-Tuttle 86 8 19921018-19921215
15 24P Schaumasse 86,87 30 19921224-19930423
16 C/1993 A1 Mueller 88...90 27 19930815-19931215
17 C/1993 Q1 Mueller 89 3 19931103-19931113
18 31P Schwassmann-Wachmann 2 90 2 19940116-19940209
19a 2P Encke 90 1 19940119
b 1 20170215
c 2 20230925
20 C/1993 Y1 McNaught-Russell 91 12 19940327-19940513
21a 9P Tempel 1 91 9 19940330-19940513
b 138 2 20050510-20050511
22 C/1994 G1 Takamizawa-Levy 91,92 11 19940503-19940702
23 C/1994 J2 Takamizawa 91 3 19940512-19940513
24 C/1994 N1 Nakamura-Nishimura-Machholz 92 11 19940716-19940910
25a 141P Machholz 2 92 4 19940815-19940914
b 113,114,116 9 19991126-20000205
c 4 20210110-
26a 19P Borrelly 92,94,96 6 19940910-19941230
b 120 1 20010829
c 8 20220106-
27 C/1994 T1 Machholz 94 4 19941201-19941224
28 6P d'Arrest 96 7 19950724-19950806
29 122P de Vico 98 13 19950926-19951124
30 C/1995 Q1 Bradfield 98 6 19950926-19951025
31 58P Jackson-Neujmin 98 1 19951122
32a 73P Schwassmann-Wachmann 3 98 3 19951124-19960116
b 138,139 8 20060406-20060503
33 C/1995 Y1 Hyakutake 98,99 11 19951229-19960328
34a 67P Churyumov-Gerasimenko 98 10 19960111-19960209
b 10 20210904-
35a 45P Honda-Mrkos-Pajdusakova 98 5 19960130-19960228
b 3 20170106-20170224
36 C/1996 B1 Szczepanski 98,99 12 19960131-19960415
37 C/1996 B2 Hyakutake 98,99 21 19960226-19960420
38 29P Schwassmann-Wachmann 1 98 15 19960228-
39 22P Kopff 99,100 12 19960338-19960819
40 C/1995 O1 Hale-Bopp 99,100..103 50 19960418-19970502
41 C/1996 E1 NEAT 100 9 19960720-19960919
42 C/1996 N1 Brewington 100,101 13 19960720-19961014
43 57P du Toit-Neujmin-Delporte 100 1 19960727
44 C/1996 Q1 Tabur 100,101 8 19960824-19961108
45 C/1996 R1 Hergenrother-Spahr 100,101 3 19960919-19961014
46 126P IRAS 101 1 19961108
47 118P Shoemaker-Levy 4 101,102 11 19961204-19970310
48a 81P Wild 2 101...103 21 19961212-19970607
48b 4 20091226-20100407
49a 46P Wirtanen 102,103 13 19970201-19970509
b 145,147 9 20080129-20080305
c 17 20181210-20190227
50 C/1997 D1 Mueller 102,103 7 19970304-19970509
51 C/1997 J1 Mueller 103 4 19970507-19970607
52 C/1997 J2 Meunier-Dupouy 103,4,7...9 20 19970509-19981112
53a 78P Gehrels 2 104,106 2 19970912-19980220
b 133 1 20041107
54 43P Wolf-Harrington 104 1 19970912
55 55P Tempel-Tuttle 106 6 19980114-19980221
56 69P Taylor 106 2 19980220-19980221
57 C/1998 H1 Stonehouse 107 4 19980426-19980517
58 C/1998 K5 LINEAR 107...109 10 19980621-19981020
59 C/1998 M5 LINEAR 108...110 38 19980719-19990518
60a 21P Giacobini-Zinner 108,109 11 19980725-19981217
b 22 20180713-20181014
61 52P Harrington-Abell 108...110 23 19980726-19990410
62 93P Lovas 1 109 11 19981016-19990123
63a 88P Howell 109 1 19981112
b 6 20200514-
64 C/1998 U5 LINEAR 109 9 19981112-19990119
65 C/1998 U3 Jäger 109...111 20 19981112-19990507
66 C/1998 P1 Williams 109,110 9 19981218-19990312
67 C/1999 H3 LINEAR 111,113,114 8 19990518-20000112
68 10P Tempel 2 111,113 7 19990603-19990717
69 37P Forbes 113 2 19990711-19990718
70 C/1999 J3 LINEAR 113 2 19990716-19990717
71 C/1999 H1 Lee 114,114 10 19991001-19991204
72 C/1999 N2 Lynn 113 1 19991001
73 C/1999 S3 LINEAR 113,114 10 19991001-20000105
74 106P Schuster 113,114 3 19991126-19991204
75 114P Wiseman-Skiff 114 4 19991204-20000111
76 C/1999 L3 LINEAR 114,116 5 19991211-20000205
77 63P Wild 1 114 3 20000106-20000113
78 C/1999 S4 LINEAR 114,116 2 20000111-20000205
79 C/1999 T2 LINEAR 116 2 20000804-20001029
80 C/1999 Y1 LINEAR 116,119 4 20000804-20001116
81 C/2001 A2 LINEAR 119,120 8 20010703-20010815
82 P/2001 Q2 Petriew 120 2 20010824-20010829
83 153P Ikeya-Zhang 122...124 20 20020202-20020531
84 C/2000 WM1 LINEAR 122 1 20020329
85 C/2001 OG108 LONEOS 122 5 20020331-20020407
86 C/2002 O4 Hönig 124 4 20020813-20020826
87 C/2002 O6 SWAN 124 1 20020817
88 C/2002 V1 NEAT 125,126 6 20021208-20030205
89 C/2001 RX14 LINEAR 125 1 20021208
90 C/2002 X5 Kudo-Fujikawa 125 1 20021219
91 C/2002 Y1 Juels-Holvorcem 126 7 20030220-20030323
92 C/2001 HT50 LINEAR-NEAT 126 1 20030225
93 C/2002 T7 LINEAR 128,130 8 20031027-20040123
94 C/2004 F4 Bradfield 130,131 2 20040501-20040520
95 C/2001 Q4 NEAT 131,132 22 20040514-20040918
96 C/2003 K4 LINEAR 131,132 7 20040520-20040811
97 C/2004 Q1 Tucker 133 3 20041107-20050110
98 C/2004 Q2 Machholz 133,134,138 43 20041229-20050511
99 C/2003 T4 LINEAR 133 2 20050115-20050116
100 C/2005 E2 McNaught 138 1 20060129
101 C/2006 A1 Pojmanski 138 1 20060324
102 177P Barnard 139,140 12 20060717-20060924
103 C/2006 M4 SWAN 140 13 20061007-20061030
104 C/2006 L1 Garradd 140 1 20061027
105 C/2007 E1 Garradd 143 2 20070407-20070411
106 C/2007 E2 Lovejoy 143 1 20070423
107 C/2006 VZ13 LINEAR 143 8 20070706-20070722
108 C/2007 F1 LONEOS 144 3 20071007-20071015
109 17P Holmes 144,145,147 43 20071031-20080305
110 8P Tuttle 145 10 20071201-20080109
111 C/2008 C1 Chen-Gao 147 3 20080323-20080329
112 C/2008 J1 Boattini 147 2 20080702-20080704
113 C/2007 W1 Boattini 148,149 7 20080805-20080827
114 C/2006 OF2 Broughton 148,149 4 20081011-20081228
115 C/2006 W3 Christensen 148,149 30 20081011-20091014
116a 144P Kushida 149,150 8 20081225-20090319
b 14 20240104-
117 C/2007 N3 Lulin 150 13 20090302-20090419
118 C/2009 E1 Itagaki 150 1 20090320
119 C/2009 F6 Yi-SWAN 150 5 20090413-20090420
120 C/2008 T2 Cardinal 150 3 20090413-20090415
121 217P LINEAR 4 20090824-20090927
122 C/2007 Q3 Siding Spring 3 20091221-20091229
123 C/2009 K5 McNaught 2 20100406-20100407
124 C/2013 R1 Lovejoy 6 20140217-20140314
125 C/2012 X1 LINEAR 4 20140217-20140314
126 C/2012 K1 PANSTARRS 25 20140309-20141005
127 C/2014 E2 Jacques 31 20140420-20140928
128 C/2013 UQ4 Catalina 3 20140703-20140717
129 C/2014 Q3 Borisov 1 20141024
130 C/2014 Q2 Lovejoy 72 20141228-20150915
131a 15P Finlay 4 20150117-20150208
b 1 20210814-
132 C/2015 F3 SWAN 2 20150405-20150415
133 C/2015 F5 SWAN-Xingming 2 20150419-20150420
134 C/2015 F4 Jacques 9 20150716-20150812
135 C/2014 S2 PANSTARRS 27 20150915-20160303
136 C/2013 X1 PANSTARRS 12 20151113-20160208
137 C/2013 US10 Catalina 10 20160108-20160303
138 C/2016 A8 LINEAR 3 20160924-20160927
139 C/2015 V2 Johnson 14 20161128-20170614
140 C/2016 U1 NEOWISE 2 20161129-20161205
141 41P Tuttle-Giacobini-Kresak 11 20170218-20170419
142a 62P Tsuchinshan 2 20171030-20171102
b 7 20231122-
143 C/2017 O1 ASASSN 5 20171030-20171122
144 C/2017 T1 Heinze 3 20180114-20180117
145 C/2016 R2 PANSTARRS 3 20180114-20180305
146 C/2017 S3 PANSTARRS 4 20180717-20180721
147 64P Swift-Gehrels 17 20180929-20190102
148 38P Stephan-Oterma 10 20181006-20190121
149 C/2018 Y1 Iwamoto 19 20190121-20190401
150 C/2018 W2 Africano 12 20190710-20190920
151 C/2018 N2 ASASSN 19 20190809-20200129
152 260P McNaught 8 20190831-20191116
153 C/2017 T2 PANSTARRS 69 20190906-20200805
154 C/2020 A2 Iwamoto 3 20200206-20200222
155 C/2019 Y1 ATLAS 34 20200219-20200530
156 C/2019 Y4 ATLAS 33 20200312-20200511
157 C/2020 F8 SWAN 1 20200521
158 C/2020 F3 NEOWISE 24 20200707-20200808
159 C/2019 U6 Lemmon 7 20200713-20200902
160 C/2020 M3 ATLAS 9 20201020-
161 C/2020 S3 Erasmus 2 20201020-
162 156P Russell-LINEAR 14 20201104-
163 398P Boattini 2 20210109-
164 C/2021 A2 NEOWISE 2 20210212-
165 C/2021 A4 NEOWISE 4 20210212-
166 C/2019 L3 ATLAS 23 20210228-
167 C/2020 T2 Palomar 6 20210331-
168 C/2020 R4 ATLAS 2 20210502-
169 C/2017 K2 PANSTARRS 10 20210814-
170 C/2021 A1 Leonard 5 20211110-
171 104P Kowal 7 20220106-
172 C/2021 F1 Lemmon-PANSTARRS 3 20220227-
173 C/2022 E3 ZTF 9 20220803-
174 C/2020 V2 ZTF 6 20221227-
175 C/2022 A2 PANSTARRS 5 20221227-
176 C/2022 U2 ATLAS 2 20230213-
177 12P Pons-Brooks 21 20231007-
178 C/2021 S2 PANSTARRS 2 20240308-
179 C/2023 A3 Tsuchinshan-ATLAS 1 20240308-
180 13P Olbers 1 20240308-