COBS Statistics page

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COBS Statistics:
Select Comet:

Observations statistics for 2017

Total:
Number of active observers:
(total includes noncontributing observers)
81 of 2543
Number of active associations:
(total includes noncontributing associations)
10 of 15
Number of active countries:
(total includes noncontributing countries)
24 of 250
Number of observed comets:
(total is number of comets in COBS database)
77 of 1655
Total number of observations:
2589
- Visual Observations:
1671
- CCD Observations:
918

Observed comets: (77)
Total:
Visual:
CCD:
Short-period comets: (39)
1339 843 496
One-apparition Short-period comets: (3)
17 5 12
Long-period comets: (35)
1233 823 410

Most observed comets:
Total:
Visual:
CCD:
647 521 126
590 465 125
247 167 80
195 140 55
146 99 47
98 87 11
97 55 42
48 15 33
46 17 29
28 12 16

Top observers:
Total:
Visual:
CCD:
336 0 336
190 0 190
126 0 126
107 107 0
101 101 0
87 87 0
84 84 0
71 71 0
70 70 0
64 0 64

Top Associations:
Total:
Visual:
CCD:
829 638 191
530 339 191
518 163 355
263 117 146
112 84 28
103 103 0
95 88 7
63 63 0
45 45 0
31 31 0

Top Countries:
Total:
Visual:
CCD:
517 326 191
422 67 355
224 166 58
222 222 0
181 153 28
168 143 25
166 166 0
130 59 71
126 0 126
107 77 30