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Comets

Browse and discover detailed information about 193 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 88P/Howell

88P/Howell
R.A: 00h 43m 27s   Dec: +02° 46’ 15”
Observed Magnitude 12.8 (COBS)
Estimated Magnitude 17.5 (JPL)  fading
in Cetus   current altitude less than 30 degrees above the horizon

Comet C/2019 L3 (ATLAS)

C/2019 L3 (ATLAS)
R.A: 01h 35m 32s   Dec: +51° 48’ 40”
Observed Magnitude 12.9 (COBS)
Estimated Magnitude 14.7 (JPL)  brightening
in Perseus   current altitude greater than 30 degrees above the horizon

Comet 156P/Russell-LINEAR

156P/Russell-LINEAR
R.A: 04h 25m 18s   Dec: +40° 40’ 26”
Observed Magnitude 13.4 (COBS)
Estimated Magnitude 18.1 (JPL)  fading
in Perseus   current altitude less than 30 degrees above the horizon

Comet C/2021 A4 (NEOWISE)

C/2021 A4 (NEOWISE)
R.A: 04h 23m 53s   Dec: +08° 42’ 00”
Observed Magnitude 13.5 (COBS)
Estimated Magnitude 16.0 (JPL)  fading
in Taurus   object currently below the horizon

Comet C/2020 R4 (ATLAS)

C/2020 R4 (ATLAS)
R.A: 20h 34m 55s   Dec: -10° 36’ 14”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 13.5 (JPL)  brightening
in Capricornus   current altitude less than 30 degrees above the horizon

Comet P/2016 J3 (STEREO = 2021 A3)

P/2016 J3 (STEREO)
R.A: 19h 15m 50s   Dec: -52° 33’ 10”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 13.6 (JPL)  fading
in Telescopium   object currently below the horizon

Comet C/2020 T2 (Palomar)

C/2020 T2 (Palomar)
R.A: 14h 06m 31s   Dec: +31° 46’ 07”
Observed Magnitude 13.7 (COBS)
Estimated Magnitude 15.0 (JPL)  brightening
in Canes Venatici   current altitude less than 30 degrees above the horizon

Comet C/2019 N1 (ATLAS)

C/2019 N1 (ATLAS)
R.A: 02h 22m 35s   Dec: -84° 44’ 26”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 14.0 (JPL)  fading
in Octans   object currently below the horizon

Comet C/2020 M3 (ATLAS)

C/2020 M3 (ATLAS)
R.A: 06h 22m 51s   Dec: +47° 09’ 14”
Observed Magnitude 14.1 (COBS)
Estimated Magnitude 18.2 (JPL)  fading
in Auriga   current altitude less than 30 degrees above the horizon

Comet 11P/Tempel-Swift-LINEAR

11P/Tempel-Swift-LINEAR
R.A: 05h 00m 44s   Dec: +08° 58’ 40”
Observed Magnitude 14.2 (COBS)
Estimated Magnitude 20.9 (JPL)  fading
in Orion   object currently below the horizon

Comet 75D/Kohoutek (Lost)

75D/Kohoutek (Lost)
R.A: 03h 24m 36s   Dec: +19° 08’ 01”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 14.4 (JPL)  fading
in Aries   current altitude less than 30 degrees above the horizon

Comet C/2017 K2 (PANSTARRS)

C/2017 K2 (PANSTARRS)
R.A: 18h 24m 31s   Dec: +37° 14’ 33”
Observed Magnitude 14.5 (COBS)
Estimated Magnitude 15.3 (JPL) 
in Lyra   current altitude greater than 30 degrees above the horizon

Comet 398P/Boattini

398P/Boattini
R.A: 07h 06m 09s   Dec: +27° 12’ 20”
Observed Magnitude 14.6 (COBS)
Estimated Magnitude 16.6 (JPL)  fading
in Gemini   object currently below the horizon

Comet C/2020 J1 (SONEAR)

C/2020 J1 (SONEAR)
R.A: 17h 44m 28s   Dec: -39° 53’ 00”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 14.7 (JPL)  brightening
in Scorpius   object currently below the horizon

Comet C/2019 F1 (ATLAS-Africano)

C/2019 F1 (ATLAS-Africano)
R.A: 18h 13m 08s   Dec: -60° 20’ 42”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.1 (JPL)  brightening
in Pavo   object currently below the horizon

Comet 246P/NEAT

246P/NEAT
R.A: 18h 28m 47s   Dec: -23° 00’ 24”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.2 (JPL) 
in Sagittarius   current altitude less than 30 degrees above the horizon

Comet C/2020 F5 (MASTER)

C/2020 F5 (MASTER)
R.A: 22h 23m 01s   Dec: -44° 41’ 57”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.4 (JPL)  brightening
in Grus   object currently below the horizon

Comet C/2019 T4 (ATLAS)

C/2019 T4 (ATLAS)
R.A: 08h 00m 19s   Dec: -37° 21’ 15”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.6 (JPL) 
in Puppis   object currently below the horizon

Comet 141P/Machholz 2

141P/Machholz 2
R.A: 04h 27m 10s   Dec: +06° 36’ 21”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.7 (JPL)  fading
in Taurus   object currently below the horizon

Comet C/2021 A2

C/2021 A2
R.A: 05h 13m 18s   Dec: +39° 37’ 50”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.9 (JPL)  fading
in Auriga   current altitude less than 30 degrees above the horizon
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