COBS Statistics page

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COBS Statistics:
Select Comet:

Observations statistics for 2017

Total:
Number of active observers:
(total includes noncontributing observers)
57 of 2531
Number of active associations:
(total includes noncontributing associations)
9 of 14
Number of active countries:
(total includes noncontributing countries)
20 of 250
Number of observed comets:
(total is number of comets in COBS database)
60 of 1632
Total number of observations:
999
- Visual Observations:
592
- CCD Observations:
407

Observed comets: (60)
Total:
Visual:
CCD:
Short-period comets: (33)
659 411 248
One-apparition Short-period comets: (3)
13 4 9
Long-period comets: (24)
327 177 150

Most observed comets:
Total:
Visual:
CCD:
255 189 66
159 109 50
148 108 40
112 76 36
61 37 24
25 11 14
15 9 6
14 9 5
14 10 4
12 1 11

Top observers:
Total:
Visual:
CCD:
149 0 149
91 0 91
63 0 63
56 56 0
41 41 0
39 39 0
35 35 0
32 0 32
30 30 0
30 30 0

Top Associations:
Total:
Visual:
CCD:
337 217 120
239 148 91
228 75 153
48 41 7
41 37 4
40 8 32
31 31 0
20 20 0
15 15 0

Top Countries:
Total:
Visual:
CCD:
232 141 91
186 33 153
95 25 70
82 82 0
61 61 0
53 23 30
52 48 4
49 47 2
32 0 32
31 31 0