Citizen Science Contributor
John E. Bortle
Visual Observer · Visual Observer · ICQ BOR
Counts come from COBS observations and published discoverer names. They are not editable. This is a source profile, not a Venator login. Claiming a page comes later with accounts.
- Reports
- 3031
- Objects
- 155
- Last report
- 6793d ago
Reported objects
- 189
C/1995 O1
C/1995 O1 (Hale-Bopp) · Visual Observer
- 120
1P
1P/Halley · Visual Observer
- 98
21P
21P/Giacobini-Zinner · Visual Observer
- 93
2P
2P/Encke · Visual Observer
- 75
6P
6P/d'Arrest · Visual Observer
- 73
29P
29P/Schwassmann-Wachmann · Visual Observer
- 69
19P
19P/Borrelly · Visual Observer
- 64
C/1975 V1
C/1975 V1 (West) · Visual Observer
- 63
17P
17P/Holmes · Visual Observer
- 57
22P
22P/Kopff · Visual Observer
- 54
81P
81P/Wild · Visual Observer
- 54
C/1970 N1
C/1970 N1 (Abe) · Visual Observer
- 54
C/1996 B2
C/1996 B2 (Hyakutake) · Visual Observer
- 50
C/1987 P1
C/1987 P1 (Bradfield) · Visual Observer
- 48
C/1974 C1
C/1974 C1 (Bradfield) · Visual Observer
- 45
C/1990 K1
C/1990 K1 (Levy) · Visual Observer
- 44
C/1973 E1
C/1973 E1 (Kohoutek) · Visual Observer
- 43
9P
9P/Tempel · Visual Observer
- 42
109P
109P/Swift-Tuttle · Visual Observer
- 41
45P
45P/Honda-Mrkos-Pajdusakova · Visual Observer
- 39
103P
103P/Hartley · Visual Observer
- 39
24P
24P/Schaumasse · Visual Observer
- 36
4P
4P/Faye · Visual Observer
- 36
8P
8P/Tuttle · Visual Observer
- 32
141P-A
141P-A/Machholz · Visual Observer
- 32
P/1994 P1-A
P/1994 P1-A (Machholz) · Visual Observer
- 31
C/1969 Y1
C/1969 Y1 (Bennett) · Visual Observer
- 31
C/1975 N1
C/1975 N1 (Kobayashi-Berger-Milon) · Visual Observer
- 30
C/1967 Y1
C/1967 Y1 (Ikeya-Seki) · Visual Observer
- 30
C/1977 R1
C/1977 R1 (Kohler) · Visual Observer
- 30
C/1993 Y1
C/1993 Y1 (McNaught-Russell) · Visual Observer
- 29
C/1966 P1
C/1966 P1 (Kilston) · Visual Observer
- 29
C/1989 X1
C/1989 X1 (Austin) · Visual Observer
- 27
67P
67P/Churyumov-Gerasimenko · Visual Observer
- 27
C/1997 J2
C/1997 J2 (Meunier-Dupoy) · Visual Observer
- 26
38P
38P/Stephan-Oterma · Visual Observer
- 26
C/1993 A1
C/1993 A1 (Mueller) · Visual Observer
- 25
23P
23P/Brorsen-Metcalf · Visual Observer
- 25
26P
26P/Grigg-Skjellerup · Visual Observer
- 25
C/1968 N1
C/1968 N1 (Honda) · Visual Observer
1–40 of 155