COBS Statistics page

COBS Statistics:
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Observations statistics for Japan

Total:
Number of active observers:
(total includes noncontributing observers)
194 of 2585
Number of active associations:
(total includes noncontributing associations)
3 of 16
Number of observed comets:
(total is number of comets in COBS database)
694 of 1722
Total number of observations:
23446
- Visual Observations:
15181
- CCD Observations:
8265

Observed comets: (694)
Total:
Visual:
CCD:
Short-period comets: (247)
10327 6595 3732
One-apparition Short-period comets: (32)
112 45 67
Long-period comets: (414)
13000 8534 4466

Most observed comets:
Total:
Visual:
CCD:
829 829 0
781 774 7
597 367 230
480 480 0
416 366 50
389 334 55
389 389 0
387 360 27
355 355 0
264 264 0

Top observers:
Total:
Visual:
CCD:
4758 2154 2604
2273 588 1685
1979 1413 566
1704 1015 689
1131 1131 0
1128 1044 84
851 0 851
672 672 0
636 636 0
613 613 0

Top Associations:
Total:
Visual:
CCD:
12872 9066 3806
5361 2416 2945
5213 3699 1514
Year:
Total:
Visual:
CCD:
2018 52 21 31
2017 374 239 135
2016 195 99 96
2015 383 227 156
2014 367 168 199
2013 514 236 278
2012 301 89 212
2011 296 98 198
2010 371 171 200
2009 22 12 10
2008 279 191 88
2007 673 476 197
2006 550 328 222
2005 842 427 415
2004 1187 657 530
2003 1131 381 750
2002 1578 390 1188
2001 1132 354 778
2000 1075 234 841
1999 1113 223 890
1998 657 205 452
1997 931 632 299
1996 937 912 25
1995 524 485 39
1994 768 748 20
1993 388 373 15
1992 713 712 1
1991 375 375 0
1990 789 789 0
1989 628 628 0
1988 608 608 0
1987 441 441 0
1986 620 620 0
1985 595 595 0
1984 250 250 0
1983 240 240 0
1982 157 157 0
1981 383 383 0
1980 520 520 0
1979 34 34 0
1978 8 8 0
1977 427 427 0
1976 3 3 0
1975 1 1 0
1967 2 2 0
1965 12 12 0