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Comets

Browse and discover detailed information about 197 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 201P/LONEOS

201P/LONEOS
R.A: 03h 26m 55s   Dec: +20° 33’ 58”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.1 (JPL)  brightening
in Aries   current altitude less than 30 degrees above the horizon

Comet C/2017 T2 (PANSTARRS)

C/2017 T2 (PANSTARRS)
R.A: 17h 15m 31s   Dec: -44° 50’ 37”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.1 (JPL)  fading
in Scorpius   object currently below the horizon

Comet 29P/Schwassmann-Wachmann 1

29P/Schwassmann-Wachmann 1
R.A: 03h 34m 01s   Dec: +27° 09’ 04”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.3 (JPL) 
in Taurus   current altitude less than 30 degrees above the horizon

Comet 117P/Helin-Roman-Alu 1

117P/Helin-Roman-Alu 1
R.A: 13h 02m 47s   Dec: +00° 03’ 10”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.3 (JPL) 
in Virgo   current altitude less than 30 degrees above the horizon

Comet ZTF (C/2020 V2)

C/2020 V2 (ZTF)
R.A: 12h 13m 59s   Dec: +39° 01’ 11”
Observed Magnitude 16.3 (COBS)
Estimated Magnitude 17.4 (JPL) 
in Canes Venatici   current altitude greater than 30 degrees above the horizon

Comet 28P/Neujmin 1

28P/Neujmin 1
R.A: 01h 42m 19s   Dec: +15° 30’ 34”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.4 (JPL)  fading
in Pisces   current altitude less than 30 degrees above the horizon

Comet C/2020 S8 (Lemmon)

C/2020 S8 (Lemmon)
R.A: 12h 38m 36s   Dec: +04° 36’ 08”
Observed Magnitude 16.5 (COBS)
Estimated Magnitude 17.2 (JPL)  fading
in Virgo   current altitude less than 30 degrees above the horizon

Comet 10P/Tempel 2

10P/Tempel 2
R.A: 01h 10m 22s   Dec: +00° 04’ 24”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.6 (JPL) 
in Cetus   object currently below the horizon

Comet 17P/Holmes

17P/Holmes
R.A: 01h 48m 22s   Dec: +23° 18’ 59”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.7 (JPL)  fading
in Pisces   current altitude less than 30 degrees above the horizon

Comet C/2021 A7 (NEOWISE)

C/2021 A7 (NEOWISE)
R.A: 07h 36m 42s   Dec: -07° 01’ 36”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.9 (JPL) 
in Monoceros   current altitude less than 30 degrees above the horizon

Comet C/2020 K5 (PANSTARRS)

C/2020 K5 (PANSTARRS)
R.A: 01h 31m 03s   Dec: -45° 52’ 52”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.9 (JPL) 
in Phoenix   object currently below the horizon

Comet Leonard (C/2021 A1)

C/2021 A1 (Leonard)
R.A: 10h 59m 14s   Dec: +59° 30’ 33”
Observed Magnitude 17.3 (COBS)
Estimated Magnitude 17.0 (JPL)  brightening
in Ursa Major   current altitude greater than 30 degrees above the horizon

Comet 67P/Churyumov-Gerasimenko

67P/Churyumov-Gerasimenko
R.A: 23h 08m 57s   Dec: -09° 24’ 24”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.1 (JPL)  brightening
in Aquarius   object currently below the horizon

Comet 6P/d'Arrest

6P/d'Arrest
R.A: 16h 47m 04s   Dec: +15° 56’ 18”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.1 (JPL)  brightening
in Hercules   object currently below the horizon

Comet P/2010 H2 (Vales)

P/2010 H2 (Vales)
R.A: 01h 24m 55s   Dec: -01° 43’ 47”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.2 (JPL)  brightening
in Cetus   object currently below the horizon

Comet 284P/McNaught

284P/McNaught
R.A: 22h 17m 47s   Dec: -07° 08’ 27”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.3 (JPL)  brightening
in Aquarius   object currently below the horizon

Comet C/2020 K1 (PANSTARRS)

C/2020 K1 (PANSTARRS)
R.A: 18h 37m 12s   Dec: +46° 05’ 29”
Observed Magnitude 17.5 (COBS)
Estimated Magnitude 18.3 (JPL)  brightening
in Lyra   current altitude less than 30 degrees above the horizon

Comet 57P/duToit-Neujmin-Delporte

57P/duToit-Neujmin-Delporte
R.A: 15h 29m 25s   Dec: -14° 59’ 49”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.7 (JPL)  brightening
in Libra   object currently below the horizon

Comet C/2020 N1 (PANSTARRS)

C/2020 N1 (PANSTARRS)
R.A: 07h 44m 56s   Dec: -01° 55’ 39”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.8 (JPL)  fading
in Monoceros   current altitude greater than 30 degrees above the horizon

Comet 152P/Helin-Lawrence

152P/Helin-Lawrence
R.A: 13h 23m 33s   Dec: +03° 55’ 15”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.8 (JPL) 
in Virgo   current altitude less than 30 degrees above the horizon
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