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Comets

Browse and discover detailed information about 197 of the most interesting comets. Comets are listed in order of decreasing brightness.

Visibility from selected location  = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Comet C/2020 U5 (PANSTARRS)

C/2020 U5 (PANSTARRS)
R.A: 06h 32m 40s   Dec: +40° 17’ 52”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.8 (JPL) 
in Auriga   current altitude greater than 30 degrees above the horizon

Comet C/2021 A2

C/2021 A2
R.A: 05h 36m 10s   Dec: +58° 01’ 49”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.9 (JPL)  fading
in Camelopardalis   current altitude greater than 30 degrees above the horizon

Comet 193P/LINEAR-NEAT

193P/LINEAR-NEAT
R.A: 22h 33m 54s   Dec: -14° 26’ 21”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.9 (JPL)  brightening
in Aquarius   object currently below the horizon

Comet 52P/Harrington-Abell

52P/Harrington-Abell
R.A: 03h 21m 44s   Dec: +25° 32’ 14”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.9 (JPL)  brightening
in Aries   current altitude less than 30 degrees above the horizon

5D/Brorsen (Lost)

5D/Brorsen (Lost)
R.A: 21h 28m 42s   Dec: -25° 50’ 38”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.0 (JPL)  brightening
in Pisces Austrinus   object currently below the horizon

Comet 119P/Parker-Hartley

119P/Parker-Hartley
R.A: 22h 42m 25s   Dec: -12° 54’ 04”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.2 (JPL)  brightening
in Aquarius   object currently below the horizon

Comet C/2021 D1 (SWAN)

C/2021 D1 (SWAN)
R.A: 05h 58m 04s   Dec: +31° 57’ 45”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.2 (JPL)  fading
in Auriga   current altitude greater than 30 degrees above the horizon

Comet 70P/Kojima

70P/Kojima
R.A: 03h 48m 10s   Dec: +15° 51’ 07”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.3 (JPL)  brightening
in Taurus   current altitude less than 30 degrees above the horizon

Comet 132P/Helin-Roman-Alu 2

132P/Helin-Roman-Alu 2
R.A: 22h 28m 45s   Dec: -05° 35’ 51”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.4 (JPL)  brightening
in Aquarius   object currently below the horizon

Comet 9P/Tempel 1

9P/Tempel 1
R.A: 08h 07m 04s   Dec: +29° 03’ 26”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.5 (JPL) 
in Gemini   current altitude greater than 30 degrees above the horizon

Comet 74P/Smirnova-Chernykh

74P/Smirnova-Chernykh
R.A: 22h 01m 53s   Dec: -17° 59’ 38”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.6 (JPL)  brightening
in Aquarius   object currently below the horizon

Comet 252P/LINEAR

252P/LINEAR
R.A: 05h 55m 26s   Dec: +17° 03’ 26”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.7 (JPL)  brightening
in Taurus   current altitude greater than 30 degrees above the horizon

Comet 240P/NEAT

240P/NEAT
R.A: 15h 27m 38s   Dec: -06° 49’ 49”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.7 (JPL) 
in Libra   object currently below the horizon

Comet P/2016 J3 (STEREO = 2021 A3)

P/2016 J3 (STEREO)
R.A: 15h 25m 48s   Dec: -37° 26’ 32”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.7 (JPL)  fading
in Lupus   object currently below the horizon

Comet C/2020 T4 (PANSTARRS)

C/2020 T4 (PANSTARRS)
R.A: 02h 40m 28s   Dec: +59° 37’ 27”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.7 (JPL)  brightening
in Cassiopeia   current altitude greater than 30 degrees above the horizon

Comet C/2020 S4 (PANSTARRS)

C/2020 S4 (PANSTARRS)
R.A: 03h 40m 02s   Dec: +02° 50’ 39”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.7 (JPL)  brightening
in Taurus   current altitude less than 30 degrees above the horizon

Comet 116P/Wild 4

116P/Wild 4
R.A: 05h 15m 37s   Dec: +25° 38’ 55”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.8 (JPL)  brightening
in Taurus   current altitude greater than 30 degrees above the horizon

Comet 116P/Wild 4

116P/Wild 4
R.A: 05h 15m 37s   Dec: +25° 38’ 55”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.8 (JPL)  brightening
in Taurus   current altitude greater than 30 degrees above the horizon

Comet C/2021 A4 (NEOWISE)

C/2021 A4 (NEOWISE)
R.A: 04h 19m 38s   Dec: -19° 21’ 56”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.9 (JPL)  fading
in Eridanus   object currently below the horizon

Comet 65P/Gunn

65P/Gunn
R.A: 05h 28m 40s   Dec: +26° 42’ 40”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 20.0 (JPL) 
in Taurus   current altitude greater than 30 degrees above the horizon
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