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 P/2010 H2 (Vales)

P/2010 H2 (Vales)
R.A: 00h 01m 39s   Dec: -18° 43’ 23”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.0 (JPL) 
in Cetus   current altitude less than 30 degrees above the horizon

Comet 28P/Neujmin 1

28P/Neujmin 1
R.A: 14h 11m 53s   Dec: -28° 37’ 24”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.0 (JPL) 
in Hydra   object currently below the horizon

Comet C/2014 F3 (Sheppard-Trujillo)

C/2014 F3 (Sheppard-Trujillo)
R.A: 20h 20m 57s   Dec: -22° 36’ 06”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.0 (JPL) 
in Capricornus   object currently below the horizon

Comet C/2017 Y2 (PANSTARRS)

C/2017 Y2 (PANSTARRS)
R.A: 17h 47m 50s   Dec: +15° 41’ 13”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.0 (JPL) 
in Hercules   object currently below the horizon

Comet C/2018 F4 (PANSTARRS)

C/2018 F4 (PANSTARRS)
R.A: 03h 23m 55s   Dec: -35° 35’ 23”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.0 (JPL) 
in Fornax   current altitude less than 30 degrees above the horizon

Comet C/2019 T4 (ATLAS)

C/2019 T4 (ATLAS)
R.A: 07h 35m 33s   Dec: -26° 22’ 24”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.0 (JPL) 
in Puppis   object currently below the horizon

Comet C/2020 H4 (Leonard)

C/2020 H4 (Leonard)
R.A: 10h 27m 15s   Dec: +62° 21’ 59”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.0 (JPL) 
in Ursa Major   current altitude greater than 30 degrees above the horizon

Comet C/2020 M3 (ATLAS)

C/2020 M3 (ATLAS)
R.A: 01h 48m 13s   Dec: -34° 57’ 33”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.0 (JPL) 
in Fornax   current altitude less than 30 degrees above the horizon

Comet ATLAS (C/2019 Y4)

C/2019 Y4 (ATLAS)
R.A: 06h 53m 05s   Dec: +00° 17’ 27”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 17.1 (JPL)  fading
in Monoceros   current altitude less than 30 degrees above the horizon

Comet 117P/Helin-Roman-Alu 1

117P/Helin-Roman-Alu 1
R.A: 11h 07m 46s   Dec: +12° 56’ 02”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.0 (JPL) 
in Leo   object currently below the horizon

Comet C/2017 M4 (ATLAS)

C/2017 M4 (ATLAS)
R.A: 09h 43m 15s   Dec: -56° 16’ 53”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.0 (JPL) 
in Vela   object currently below the horizon

Comet C/2018 A6 (Gibbs)

C/2018 A6 (Gibbs)
R.A: 23h 37m 07s   Dec: -31° 00’ 31”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.0 (JPL) 
in Sculptor   current altitude less than 30 degrees above the horizon

Comet C/2019 B3 (PANSTARRS)

C/2019 B3 (PANSTARRS)
R.A: 11h 06m 57s   Dec: -63° 25’ 15”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.0 (JPL) 
in Carina   object currently below the horizon

Comet C/2019 K1 (ATLAS)

C/2019 K1 (ATLAS)
R.A: 05h 54m 46s   Dec: +00° 22’ 07”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.0 (JPL) 
in Orion   current altitude less than 30 degrees above the horizon

Comet C/2019 T3 (ATLAS)

C/2019 T3 (ATLAS)
R.A: 01h 31m 11s   Dec: +73° 43’ 54”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.0 (JPL) 
in Cassiopeia   current altitude greater than 30 degrees above the horizon

Comet C/2020 H6 (ATLAS)

C/2020 H6 (ATLAS)
R.A: 12h 17m 05s   Dec: -31° 59’ 50”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.0 (JPL) 
in Hydra   object currently below the horizon

Comet 297P/Beshore (2008 J2)

297P/Beshore (2008 J2)
R.A: 11h 26m 27s   Dec: +12° 07’ 50”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.0 (JPL) 
in Leo   object currently below the horizon

Comet C/2020 N2 (ATLAS)

C/2020 N2 (ATLAS)
R.A: 17h 59m 34s   Dec: -45° 26’ 39”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 18.1 (JPL)  fading
in Ara   object currently below the horizon

Comet 10P/Tempel 2

10P/Tempel 2
R.A: 12h 47m 55s   Dec: +05° 56’ 13”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.0 (JPL) 
in Virgo   object currently below the horizon

Comet 110P/Hartley 3

110P/Hartley 3
R.A: 00h 10m 24s   Dec: +15° 55’ 24”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 19.0 (JPL) 
in Pegasus   current altitude greater than 30 degrees above the horizon
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