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Comets

Browse and discover detailed information about 175 of the most interesting comets. Comets are listed in order of decreasing brightness.

Search Comets:
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/2017 T2 (PANSTARRS)

C/2017 T2 (PANSTARRS)
C/2017 T2 (PANSTARRS) is brighter than mag 10
R.A: 02h 18m 49s   Dec: +57° 49’ 51”
Observed Magnitude 9.4 (COBS)
Estimated Magnitude 12.0 (JPL) 
in Perseus   current altitude greater than 30 degrees above the horizon

Comet C/2019 Y1 (ATLAS)

C/2019 Y1 (ATLAS)
R.A: 23h 43m 26s   Dec: -07° 23’ 46”
Observed Magnitude 11.5 (COBS)
Estimated Magnitude 13.8 (JPL)  brightening
in Aquarius   object currently below the horizon

Comet C/2018 N2 (ASASSN)

C/2018 N2 (ASASSN)
R.A: 23h 35m 44s   Dec: +42° 03’ 19”
Observed Magnitude 12.5 (COBS)
Estimated Magnitude 14.5 (JPL)  fading
in Andromeda   current altitude greater than 30 degrees above the horizon

Comet C/2020 A2 (Iwamoto)

C/2020 A2 (Iwamoto)
R.A: 18h 15m 36s   Dec: +25° 27’ 45”
Observed Magnitude 13.0 (COBS)
Estimated Magnitude 15.2 (JPL)  brightening
in Hercules   object currently below the horizon

Comet C/2018 F4 (PANSTARRS)

C/2018 F4 (PANSTARRS)
R.A: 00h 36m 16s   Dec: -70° 48’ 22”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.9 (JPL) 
in Tucana   object currently below the horizon

Comet C/2019 N1 (ATLAS)

C/2019 N1 (ATLAS)
R.A: 18h 19m 18s   Dec: +61° 36’ 10”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.2 (JPL)  brightening
in Draco   current altitude less than 30 degrees above the horizon

Comet C/2019 K1 (ATLAS)

C/2019 K1 (ATLAS)
R.A: 22h 19m 37s   Dec: -73° 40’ 59”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.4 (JPL)  brightening
in Indus   object currently below the horizon

Comet C/2018 A6 (Gibbs)

C/2018 A6 (Gibbs)
R.A: 22h 43m 25s   Dec: -50° 04’ 13”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.4 (JPL)  fading
in Grus   object currently below the horizon

Comet C/2017 B3 (LINEAR)

C/2017 B3 (LINEAR)
R.A: 23h 21m 16s   Dec: -19° 35’ 53”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.8 (JPL)  fading
in Aquarius   object currently below the horizon

Comet C/2019 K7 (Smith)

C/2019 K7 (Smith)
R.A: 20h 30m 33s   Dec: -12° 58’ 34”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.9 (JPL) 
in Capricornus   object currently below the horizon

Comet C/2019 F1 (ATLAS-Africano)

C/2019 F1 (ATLAS-Africano)
R.A: 14h 59m 42s   Dec: -14° 04’ 36”
Observed Magnitude 16.9 (COBS)
Estimated Magnitude 16.9 (JPL)  brightening
in Libra   object currently below the horizon

Comet C/2019 Q4 (Borisov)

C/2019 Q4 (Borisov)
R.A: 12h 42m 42s   Dec: -54° 01’ 53”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.9 (JPL)  fading
in Centaurus   object currently below the horizon

Comet C/2017 K2 (PANSTARRS)

C/2017 K2 (PANSTARRS)
R.A: 18h 04m 09s   Dec: +45° 52’ 33”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.0 (JPL)  brightening
in Hercules   current altitude less than 30 degrees above the horizon

Comet 289P/Blanpain

289P/Blanpain
R.A: 08h 39m 35s   Dec: +57° 13’ 59”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.1 (JPL)  fading
in Lynx   current altitude greater than 30 degrees above the horizon

Comet C/2017 M4 (ATLAS)

C/2017 M4 (ATLAS)
R.A: 14h 22m 38s   Dec: -68° 52’ 16”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.1 (JPL) 
in Circinus   object currently below the horizon

Comet C/2016 M1 (PANSTARRS)

C/2016 M1 (PANSTARRS)
R.A: 05h 40m 55s   Dec: -28° 23’ 09”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.1 (JPL)  fading
in Columba   current altitude less than 30 degrees above the horizon

Comet 78P/Gehrels 2

78P/Gehrels 2
R.A: 09h 17m 26s   Dec: +06° 27’ 38”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.2 (JPL)  fading
in Hydra   current altitude less than 30 degrees above the horizon

Comet C/2019 L3 (ATLAS)

C/2019 L3 (ATLAS)
R.A: 22h 36m 08s   Dec: +40° 25’ 41”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.7 (JPL)  brightening
in Lacerta   current altitude less than 30 degrees above the horizon

Comet C/2015 O1 (PANSTARRS)

C/2015 O1 (PANSTARRS)
R.A: 08h 19m 04s   Dec: +23° 54’ 44”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.0 (JPL) 
in Cancer   current altitude greater than 30 degrees above the horizon

Comet P/2019 Y2 (Fuls)

P/2019 Y2 (Fuls)
R.A: 13h 17m 15s   Dec: -00° 58’ 58”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.1 (JPL)  brightening
in Virgo   object currently below the horizon
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