COBS Statistics page

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COBS Statistics:
Select Comet:

Observations statistics for ALPO

Total:
Number of active observers:
(total includes noncontributing observers)
4 of 2531
Number of active countries:
(total includes noncontributing countries)
3 of 250
Number of observed comets:
(total is number of comets in COBS database)
173 of 1632
Total number of observations:
1124
- Visual Observations:
893
- CCD Observations:
231

Observed comets: (173)
Total:
Visual:
CCD:
Short-period comets: (89)
328 266 62
One-apparition Short-period comets: (1)
1 1 0
Long-period comets: (83)
795 626 169

Most observed comets:
Total:
Visual:
CCD:
125 112 13
86 67 19
62 35 27
58 58 0
41 36 5
41 16 25
40 39 1
39 34 5
27 17 10
23 17 6

Top observers:
Total:
Visual:
CCD:
689 474 215
375 375 0
58 42 16
2 2 0

Top Countries:
Total:
Visual:
CCD:
691 476 215
375 375 0
58 42 16
Year:
Total:
Visual:
CCD:
2017 45 38 7
2016 96 87 9
2015 184 126 58
2014 232 189 43
2013 201 166 35
2012 63 45 18
2011 5 1 4
2010 39 27 12
2009 4 4 0
2007 1 1 0
2006 9 9 0
2004 1 1 0
2001 28 0 28
2000 17 0 17
1996 47 47 0
1995 40 40 0
1994 8 8 0
1993 3 3 0
1992 30 30 0
1991 24 24 0
1990 18 18 0
1989 4 4 0
1987 2 2 0
1981 1 1 0
1980 2 2 0
1978 3 3 0
1977 4 4 0
1976 13 13 0