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Comets

Browse and discover detailed information about 211 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/2021 O3 (PANSTARRS)

C/2021 O3 (PANSTARRS)
R.A: 05h 04m 25s   Dec: +70° 55’ 40”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 11.4 (JPL)  fading
in Camelopardalis   current altitude greater than 30 degrees above the horizon

Comet C/2017 K2 (PANSTARRS)

C/2017 K2 (PANSTARRS)
R.A: 18h 38m 35s   Dec: +10° 58’ 16”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 11.7 (JPL)  brightening
in Ophiucus   object currently below the horizon

Comet C/2021 E3 (ZTF)

C/2021 E3 (ZTF)
R.A: 22h 19m 03s   Dec: -62° 26’ 04”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 12.1 (JPL)  brightening
in Tucana   object currently below the horizon

Comet 45P/Honda-Mrkos-Pajdusakova

45P/Honda-Mrkos-Pajdusakova
R.A: 05h 16m 06s   Dec: +23° 56’ 15”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 12.3 (JPL)  fading
in Taurus   current altitude greater than 30 degrees above the horizon

Comet C/2019 L3 (ATLAS)

C/2019 L3 (ATLAS)
R.A: 07h 19m 16s   Dec: +10° 40’ 53”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 13.3 (JPL)  fading
in Canis Minoris   current altitude less than 30 degrees above the horizon

Comet C/2021 P4 (ATLAS)

C/2021 P4 (ATLAS)
R.A: 05h 06m 39s   Dec: +58° 12’ 56”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 13.4 (JPL)  brightening
in Camelopardalis   current altitude greater than 30 degrees above the horizon

Comet C/2019 T4 (ATLAS)

C/2019 T4 (ATLAS)
R.A: 11h 45m 00s   Dec: -11° 02’ 22”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 13.6 (JPL)  fading
in Crater   object currently below the horizon

Comet ZTF (C/2020 V2)

C/2020 V2 (ZTF)
R.A: 10h 06m 42s   Dec: +59° 42’ 26”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 14.3 (JPL) 
in Ursa Major   current altitude greater than 30 degrees above the horizon

Comet 22P/Kopff

22P/Kopff
R.A: 23h 38m 44s   Dec: -03° 53’ 25”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 14.4 (JPL)  fading
in Aquarius   current altitude less than 30 degrees above the horizon

Comet 117P/Helin-Roman-Alu 1

117P/Helin-Roman-Alu 1
R.A: 19h 09m 57s   Dec: -28° 44’ 21”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 14.6 (JPL)  brightening
in Sagittarius   object currently below the horizon

Comet C/2020 K1 (PANSTARRS)

C/2020 K1 (PANSTARRS)
R.A: 18h 50m 10s   Dec: +18° 55’ 07”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 14.9 (JPL)  brightening
in Hercules   current altitude less than 30 degrees above the horizon

Comet 116P/Wild 4

116P/Wild 4
R.A: 09h 57m 51s   Dec: +14° 23’ 47”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.0 (JPL) 
in Leo   object currently below the horizon

Comet C/2022 E3 (ZTF)

C/2022 E3 (ZTF)
R.A: 20h 06m 32s   Dec: +18° 11’ 26”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.1 (JPL)  brightening
in Sagitta   current altitude less than 30 degrees above the horizon

Comet Leonard (C/2021 A1)

C/2021 A1 (Leonard)
R.A: 19h 12m 54s   Dec: -39° 09’ 54”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.2 (JPL)  fading
in Corona Australis   object currently below the horizon

Comet 19P/Borrelly

19P/Borrelly
R.A: 07h 22m 12s   Dec: +42° 52’ 53”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.3 (JPL)  fading
in Auriga   current altitude greater than 30 degrees above the horizon

Comet 9P/Tempel 1

9P/Tempel 1
R.A: 22h 14m 22s   Dec: -20° 19’ 11”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.4 (JPL) 
in Aquarius   current altitude less than 30 degrees above the horizon

Comet C/2020 Y2 (ATLAS)

C/2020 Y2 (ATLAS)
R.A: 06h 28m 53s   Dec: -46° 09’ 42”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.4 (JPL)  fading
in Puppis   object currently below the horizon

Comet 135P/Shoemaker-Levy 8

135P/Shoemaker-Levy 8
R.A: 16h 39m 41s   Dec: -16° 54’ 46”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.5 (JPL) 
in Ophiucus   object currently below the horizon

Comet C/2020 J1 (SONEAR)

C/2020 J1 (SONEAR)
R.A: 12h 21m 43s   Dec: +31° 45’ 44”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.2 (JPL)  fading
in Coma   object currently below the horizon

Comet 51P/Harrington

51P/Harrington
R.A: 21h 17m 57s   Dec: -18° 43’ 16”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.3 (JPL)  brightening
in Capricornus   object currently below the horizon
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