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

Comets

Browse and discover detailed information about 191 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/2018 E1 (ATLAS)

C/2018 E1 (ATLAS)
R.A: 12h 14m 44s   Dec: +45° 00’ 48”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 24.0 (JPL) 
in Canes Venatici   current altitude less than 30 degrees above the horizon

Comet C/2019 B1 (Africano)

C/2019 B1 (Africano)
R.A: 01h 54m 53s   Dec: -52° 52’ 02”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 24.0 (JPL) 
in Eridanus   object currently below the horizon

Comet C/2019 H1 (NEOWISE)

C/2019 H1 (NEOWISE)
R.A: 08h 40m 50s   Dec: +63° 22’ 05”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 24.0 (JPL) 
in Ursa Major   current altitude greater than 30 degrees above the horizon

Comet C/2020 A2 (Iwamoto)

C/2020 A2 (Iwamoto)
R.A: 07h 36m 59s   Dec: +20° 42’ 30”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 24.0 (JPL) 
in Gemini   current altitude less than 30 degrees above the horizon

Comet 261P/Larson

261P/Larson
R.A: 07h 52m 18s   Dec: +20° 58’ 51”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.0 (JPL) 
in Gemini   current altitude less than 30 degrees above the horizon

Comet 52P/Harrington-Abell

52P/Harrington-Abell
R.A: 00h 29m 39s   Dec: +07° 55’ 43”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.0 (JPL) 
in Pisces   current altitude greater than 30 degrees above the horizon

Comet C/2015 X7 (ATLAS)

C/2015 X7 (ATLAS)
R.A: 16h 40m 46s   Dec: +36° 14’ 24”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.0 (JPL) 
in Hercules   current altitude less than 30 degrees above the horizon

Comet C/2017 O1 (ASASSN1)

C/2017 O1 (ASASSN1)
R.A: 12h 30m 28s   Dec: +12° 34’ 05”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.0 (JPL) 
in Virgo   object currently below the horizon

Comet C/2018 W1 (Catalina)

C/2018 W1 (Catalina)
R.A: 15h 00m 48s   Dec: -03° 11’ 46”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.0 (JPL) 
in Libra   object currently below the horizon

Comet C/2019 J1 (Lemmon)

C/2019 J1 (Lemmon)
R.A: 01h 22m 13s   Dec: -21° 16’ 38”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.0 (JPL) 
in Cetus   current altitude less than 30 degrees above the horizon

Comet Hale-Bopp (C/1995 O1)

C/1995 O1 (Hale-Bopp)
R.A: 23h 39m 01s   Dec: -86° 10’ 05”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.3 (JPL) 
in Octans   object currently below the horizon

Comet Halley (1P/Halley)

Halley's Comet
R.A: 08h 22m 58s   Dec: +02° 48’ 03”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.6 (JPL) 
in Hydra   object currently below the horizon

Comet C/2013 A1 (Siding Spring)

C/2013 A1 (Siding Spring)
R.A: 10h 09m 12s   Dec: +35° 20’ 27”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.8 (JPL) 
in Leo Minor   current altitude less than 30 degrees above the horizon

Comet 104P/Kowal 2

104P/Kowal 2
R.A: 18h 14m 02s   Dec: -16° 38’ 47”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.0 (JPL) 
in Sagittarius   object currently below the horizon

Comet 12P/Pons-Brooks

12P/Pons-Brooks
R.A: 17h 45m 16s   Dec: +20° 26’ 30”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.0 (JPL) 
in Hercules   current altitude less than 30 degrees above the horizon

Comet 13P/Olbers

13P/Olbers
R.A: 01h 55m 43s   Dec: -39° 10’ 56”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.0 (JPL) 
in Fornax   object currently below the horizon

Comet 252P/LINEAR

252P/LINEAR
R.A: 03h 21m 06s   Dec: +14° 04’ 30”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.0 (JPL) 
in Aries   current altitude greater than 30 degrees above the horizon

Comet 333P/LINEAR

333P/LINEAR
R.A: 18h 08m 40s   Dec: -44° 47’ 25”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.0 (JPL) 
in Corona Australis   object currently below the horizon

Comet 37P/Forbes

37P/Forbes
R.A: 06h 12m 51s   Dec: +29° 24’ 21”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.0 (JPL) 
in Auriga   current altitude greater than 30 degrees above the horizon

Comet 51P/Harrington

51P/Harrington
R.A: 12h 46m 42s   Dec: -00° 13’ 26”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.0 (JPL) 
in Virgo   object currently below the horizon
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