COBS Statistics page

COBS Statistics:
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Observations statistics for 2011

Total:
Number of active observers:
(total includes noncontributing observers)
79 of 2609
Number of active associations:
(total includes noncontributing associations)
11 of 16
Number of active countries:
(total includes noncontributing countries)
23 of 250
Number of observed comets:
(total is number of comets in COBS database)
147 of 1740
Total number of observations:
4036
- Visual Observations:
2891
- CCD Observations:
1145

Observed comets: (147)
Total:
Visual:
CCD:
Short-period comets: (67)
1428 881 547
One-apparition Short-period comets: (27)
103 14 89
Long-period comets: (53)
2505 1996 509

Most observed comets:
Total:
Visual:
CCD:
1064 1032 32
259 221 38
241 155 86
240 160 80
234 211 23
183 152 31
171 133 38
162 138 24
122 99 23
95 74 21

Top observers:
Total:
Visual:
CCD:
860 17 843
392 392 0
340 340 0
321 304 17
186 186 0
152 152 0
120 120 0
117 117 0
112 112 0
99 3 96

Top Associations:
Total:
Visual:
CCD:
1300 413 887
788 787 1
755 677 78
457 445 12
383 220 163
304 304 0
24 24 0
9 9 0
8 8 0
5 1 4

Top Countries:
Total:
Visual:
CCD:
920 77 843
839 761 78
452 440 12
408 408 0
304 304 0
296 98 198
227 227 0
147 147 0
120 120 0
117 113 4