COBS Statistics page

COBS Statistics:
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Observations statistics for 2017

Total:
Number of active observers:
(total includes noncontributing observers)
101 of 2621
Number of active associations:
(total includes noncontributing associations)
11 of 16
Number of active countries:
(total includes noncontributing countries)
27 of 250
Number of observed comets:
(total is number of comets in COBS database)
106 of 1744
Total number of observations:
4944
- Visual Observations:
2920
- CCD Observations:
2024

Observed comets: (106)
Total:
Visual:
CCD:
Short-period comets: (57)
2252 1309 943
One-apparition Short-period comets: (6)
21 6 15
Long-period comets: (42)
2634 1579 1055

Most observed comets:
Total:
Visual:
CCD:
852 662 190
738 574 164
436 331 105
395 255 140
232 176 56
195 124 71
185 82 103
171 116 55
143 68 75
128 115 13

Top observers:
Total:
Visual:
CCD:
659 0 659
347 0 347
285 0 285
220 220 0
166 166 0
144 144 0
138 138 0
137 137 0
134 0 134
113 2 111

Top Associations:
Total:
Visual:
CCD:
1359 969 390
1249 531 718
871 478 393
687 332 355
242 127 115
182 182 0
134 120 14
132 94 38
47 47 0
31 31 0

Top Countries:
Total:
Visual:
CCD:
979 213 766
858 465 393
388 388 0
374 239 135
322 207 115
285 0 285
282 234 48
277 277 0
230 80 150
182 182 0