Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

Comets

Browse and discover detailed information about 203 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 S3 (Erasmus)

Comet C/2020 S3
Comet C/2020 S3 is brighter than mag 10
R.A: 15h 20m 33s   Dec: -23° 37’ 13”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 7.7 (JPL)  brightening
in Libra   object currently below the horizon

Comet C/2020 M3 (ATLAS)

C/2020 M3 (ATLAS)
C/2020 M3 (ATLAS) is brighter than mag 10
R.A: 05h 22m 33s   Dec: +30° 37’ 29”
Observed Magnitude 8.2 (COBS)
Estimated Magnitude 13.9 (JPL)  fading
in Auriga   current altitude greater than 30 degrees above the horizon

Comet 88P/Howell

88P/Howell
R.A: 20h 56m 52s   Dec: -20° 55’ 27”
Observed Magnitude 10.4 (COBS)
Estimated Magnitude 15.3 (JPL)  fading
in Capricornus   object currently below the horizon

Comet 11P/Tempel-Swift-LINEAR

11P/Tempel-Swift-LINEAR
R.A: 01h 05m 22s   Dec: +09° 59’ 57”
Observed Magnitude 13.1 (COBS)
Estimated Magnitude 17.5 (JPL)  fading
in Pisces   current altitude less than 30 degrees above the horizon

Comet C/2019 N1 (ATLAS)

C/2019 N1 (ATLAS)
R.A: 14h 02m 15s   Dec: -24° 39’ 00”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 13.9 (JPL)  brightening
in Hydra   object currently below the horizon

Comet C/2019 L3 (ATLAS)

C/2019 L3 (ATLAS)
R.A: 23h 55m 56s   Dec: +60° 26’ 40”
Observed Magnitude 14.2 (COBS)
Estimated Magnitude 15.1 (JPL)  brightening
in Cassiopeia   current altitude greater than 30 degrees above the horizon

Comet C/2018 N2 (ASASSN)

C/2018 N2 (ASASSN)
R.A: 15h 58m 56s   Dec: +59° 53’ 07”
Observed Magnitude 14.7 (COBS)
Estimated Magnitude 16.1 (JPL) 
in Draco   current altitude less than 30 degrees above the horizon

Comet C/2017 K2 (PANSTARRS)

C/2017 K2 (PANSTARRS)
R.A: 17h 36m 43s   Dec: +36° 03’ 54”
Observed Magnitude 15.0 (COBS)
Estimated Magnitude 15.8 (JPL)  brightening
in Hercules   object currently below the horizon

Comet C/2020 F5 (MASTER)

C/2020 F5 (MASTER)
R.A: 19h 51m 32s   Dec: -60° 57’ 25”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.5 (JPL) 
in Pavo   object currently below the horizon

Comet C/2017 T2 (PANSTARRS)

C/2017 T2 (PANSTARRS)
R.A: 16h 21m 03s   Dec: -22° 18’ 51”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.5 (JPL)  fading
in Scorpius   object currently below the horizon

Comet 29P/Schwassmann-Wachmann 1

29P/Schwassmann-Wachmann 1
R.A: 02h 19m 02s   Dec: +25° 27’ 11”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.6 (JPL) 
in Aries   current altitude greater than 30 degrees above the horizon

Comet C/2020 J1 (SONEAR)

C/2020 J1 (SONEAR)
R.A: 17h 29m 01s   Dec: -44° 23’ 09”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.6 (JPL)  brightening
in Scorpius   object currently below the horizon

Comet SWAN (C/2020 F8)

C/2020 F8 (SWAN)
R.A: 04h 47m 07s   Dec: -11° 21’ 06”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.9 (JPL)  fading
in Eridanus   current altitude less than 30 degrees above the horizon

Comet C/2019 F1 (ATLAS-Africano)

C/2019 F1 (ATLAS-Africano)
R.A: 15h 41m 32s   Dec: -41° 43’ 12”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.9 (JPL)  brightening
in Lupus   object currently below the horizon

Comet C/2020 N1 (PANSTARRS)

C/2020 N1 (PANSTARRS)
R.A: 23h 31m 05s   Dec: +40° 05’ 31”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.9 (JPL)  brightening
in Andromeda   current altitude less than 30 degrees above the horizon

Comet 17P/Holmes

17P/Holmes
R.A: 20h 20m 02s   Dec: -20° 45’ 38”
Observed Magnitude 17.0 (COBS)
Estimated Magnitude 16.2 (JPL) 
in Capricornus   object currently below the horizon

Comet C/2019 T4 (ATLAS)

C/2019 T4 (ATLAS)
R.A: 08h 32m 48s   Dec: -38° 23’ 38”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.5 (JPL)  brightening
in Vela   object currently below the horizon

Comet P/2010 H2 (Vales)

P/2010 H2 (Vales)
R.A: 23h 19m 39s   Dec: -19° 06’ 37”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.7 (JPL) 
in Aquarius   object currently below the horizon

Comet C/2019 K7 (Smith)

C/2019 K7 (Smith)
R.A: 18h 38m 33s   Dec: +19° 55’ 05”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.7 (JPL)  fading
in Hercules   object currently below the horizon

Comet 28P/Neujmin 1

28P/Neujmin 1
R.A: 18h 03m 46s   Dec: -32° 23’ 33”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.8 (JPL) 
in Sagittarius   object currently below the horizon
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