COBS Statistics page

COBS Statistics:
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Observations statistics for 1997

Total:
Number of active observers:
(total includes noncontributing observers)
375 of 2621
Number of active associations:
(total includes noncontributing associations)
11 of 16
Number of active countries:
(total includes noncontributing countries)
40 of 250
Number of observed comets:
(total is number of comets in COBS database)
68 of 1744
Total number of observations:
12297
- Visual Observations:
11819
- CCD Observations:
478

Observed comets: (68)
Total:
Visual:
CCD:
Short-period comets: (49)
2310 2062 248
One-apparition Short-period comets: (0)
0 0 0
Long-period comets: (19)
9987 9757 230

Most observed comets:
Total:
Visual:
CCD:
8596 8503 93
785 782 3
545 519 26
463 431 32
424 404 20
234 230 4
162 147 15
147 130 17
93 88 5
83 69 14

Top observers:
Total:
Visual:
CCD:
381 381 0
328 328 0
309 28 281
301 301 0
220 220 0
217 217 0
211 211 0
205 205 0
203 203 0
192 192 0

Top Associations:
Total:
Visual:
CCD:
4285 4285 0
2817 2735 82
2005 1723 282
1092 1092 0
875 837 38
508 508 0
282 282 0
185 185 0
142 142 0
102 26 76

Top Countries:
Total:
Visual:
CCD:
1544 1544 0
1176 1176 0
1072 1072 0
1050 1050 0
1033 1033 0
931 632 299
692 691 1
551 551 0
535 535 0
454 454 0