COBS Statistics page

COBS Statistics:
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Observations statistics for 2011

Total:
Number of active observers:
(total includes noncontributing observers)
81 of 2660
Number of active associations:
(total includes noncontributing associations)
11 of 17
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 1766
Total number of observations:
4057
- Visual Observations:
2912
- CCD Observations:
1145

Observed comets: (147)
Total:
Visual:
CCD:
Short-period comets: (67)
1434 887 547
One-apparition Short-period comets: (27)
103 14 89
Long-period comets: (53)
2520 2011 509

Most observed comets:
Total:
Visual:
CCD:
1075 1043 32
261 223 38
241 155 86
240 160 80
237 214 23
184 153 31
171 133 38
163 139 24
122 99 23
97 76 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:
1317 430 887
788 787 1
759 681 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
843 765 78
469 457 12
408 408 0
304 304 0
296 98 198
227 227 0
147 147 0
120 120 0
117 113 4