COBS Statistics page

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COBS Statistics:
Select Comet:

Observations statistics for 2017

Total:
Number of active observers:
(total includes noncontributing observers)
74 of 2538
Number of active associations:
(total includes noncontributing associations)
10 of 15
Number of active countries:
(total includes noncontributing countries)
23 of 250
Number of observed comets:
(total is number of comets in COBS database)
70 of 1642
Total number of observations:
2062
- Visual Observations:
1314
- CCD Observations:
748

Observed comets: (70)
Total:
Visual:
CCD:
Short-period comets: (36)
1132 719 413
One-apparition Short-period comets: (3)
17 5 12
Long-period comets: (31)
913 590 323

Most observed comets:
Total:
Visual:
CCD:
501 397 104
451 353 98
195 140 55
178 115 63
138 98 40
91 80 11
47 15 32
46 22 24
28 12 16
22 15 7

Top observers:
Total:
Visual:
CCD:
270 0 270
150 0 150
119 0 119
87 87 0
85 85 0
70 70 0
64 0 64
57 57 0
57 57 0
50 43 7

Top Associations:
Total:
Visual:
CCD:
620 459 161
457 306 151
415 133 282
205 75 130
98 81 17
86 79 7
62 62 0
50 50 0
43 43 0
26 26 0

Top Countries:
Total:
Visual:
CCD:
444 293 151
343 61 282
143 143 0
137 104 33
136 136 0
131 116 15
128 111 17
121 50 71
119 0 119
101 71 30