COBS Statistics page

COBS Statistics:
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Observations statistics for 2009

Total:
Number of active observers:
(total includes noncontributing observers)
91 of 2621
Number of active associations:
(total includes noncontributing associations)
11 of 16
Number of active countries:
(total includes noncontributing countries)
22 of 250
Number of observed comets:
(total is number of comets in COBS database)
70 of 1744
Total number of observations:
3941
- Visual Observations:
3152
- CCD Observations:
789

Observed comets: (70)
Total:
Visual:
CCD:
Short-period comets: (31)
1400 1068 332
One-apparition Short-period comets: (9)
52 38 14
Long-period comets: (30)
2489 2046 443

Most observed comets:
Total:
Visual:
CCD:
764 608 156
616 595 21
276 207 69
219 194 25
204 204 0
194 170 24
181 164 17
147 144 3
117 91 26
115 98 17

Top observers:
Total:
Visual:
CCD:
348 348 0
336 0 336
262 262 0
251 251 0
229 0 229
182 182 0
145 145 0
142 142 0
138 16 122
135 135 0

Top Associations:
Total:
Visual:
CCD:
965 908 57
728 163 565
704 704 0
570 570 0
478 321 157
346 336 10
104 104 0
20 20 0
14 14 0
8 8 0

Top Countries:
Total:
Visual:
CCD:
870 305 565
704 704 0
474 317 157
328 328 0
262 262 0
244 244 0
219 162 57
186 186 0
166 166 0
135 135 0