COBS Statistics page

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COBS Statistics:
Select Comet:

Observations statistics for Japan

Total:
Number of active observers:
(total includes noncontributing observers)
194 of 2538
Number of active associations:
(total includes noncontributing associations)
3 of 15
Number of observed comets:
(total is number of comets in COBS database)
675 of 1642
Total number of observations:
23139
- Visual Observations:
15007
- CCD Observations:
8132

Observed comets: (675)
Total:
Visual:
CCD:
Short-period comets: (245)
10203 6526 3677
One-apparition Short-period comets: (32)
112 45 67
Long-period comets: (398)
12824 8436 4388

Most observed comets:
Total:
Visual:
CCD:
829 829 0
781 774 7
593 363 230
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
2263 583 1680
1900 1334 566
1623 997 626
1131 1131 0
1120 1036 84
851 0 851
663 663 0
636 636 0
613 613 0

Top Associations:
Total:
Visual:
CCD:
12764 9027 3737
5248 2367 2881
5127 3613 1514
Year:
Total:
Visual:
CCD:
2017 137 104 33
2016 179 83 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 671 474 197
2006 550 328 222
2005 842 427 415
2004 1186 656 530
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 389 374 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