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🌎  Greenwich, United Kingdom [change]

Comets

Browse and discover detailed information about 205 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 8P/Tuttle

8P/Tuttle
8P/Tuttle is brighter than mag 10
R.A: 11h 49m 11s   Dec: -34° 42’ 38”
Observed Magnitude 9.5 (COBS)
Estimated Magnitude 16.9 (JPL)  fading
in Hydra   object currently below the horizon

Comet 67P/Churyumov-Gerasimenko

67P/Churyumov-Gerasimenko
R.A: 06h 31m 01s   Dec: +25° 18’ 27”
Observed Magnitude 10.4 (COBS)
Estimated Magnitude 12.1 (JPL)  brightening
in Gemini   current altitude greater than 30 degrees above the horizon

Comet C/2019 L3 (ATLAS)

C/2019 L3 (ATLAS)
R.A: 07h 43m 16s   Dec: +41° 25’ 45”
Observed Magnitude 10.6 (COBS)
Estimated Magnitude 13.1 (JPL)  brightening
in Lynx   current altitude greater than 30 degrees above the horizon

Comet 4P/Faye

4P/Faye
R.A: 06h 36m 29s   Dec: +13° 15’ 48”
Observed Magnitude 11.6 (COBS)
Estimated Magnitude 13.3 (JPL) 
in Gemini   current altitude greater than 30 degrees above the horizon

Comet C/2020 T2 (Palomar)

C/2020 T2 (Palomar)
R.A: 17h 00m 40s   Dec: -28° 04’ 02”
Observed Magnitude 11.6 (COBS)
Estimated Magnitude 15.7 (JPL)  fading
in Ophiucus   object currently below the horizon

Comet Leonard (C/2021 A1)

C/2021 A1 (Leonard)
R.A: 11h 38m 18s   Dec: +35° 45’ 44”
Observed Magnitude 12.4 (COBS)
Estimated Magnitude 14.0 (JPL)  brightening
in Ursa Major   current altitude greater than 30 degrees above the horizon

Comet C/2017 K2 (PANSTARRS)

C/2017 K2 (PANSTARRS)
R.A: 17h 07m 24s   Dec: +22° 33’ 14”
Observed Magnitude 12.7 (COBS)
Estimated Magnitude 14.0 (JPL) 
in Hercules   object currently below the horizon

Comet 19P/Borrelly

19P/Borrelly
R.A: 23h 06m 52s   Dec: -55° 24’ 00”
Observed Magnitude 13.5 (COBS)
Estimated Magnitude 13.4 (JPL)  brightening
in Grus   object currently below the horizon

Comet C/2019 T4 (ATLAS)

C/2019 T4 (ATLAS)
R.A: 11h 03m 59s   Dec: -25° 18’ 58”
Observed Magnitude 13.8 (COBS)
Estimated Magnitude 15.0 (JPL) 
in Hydra   current altitude less than 30 degrees above the horizon

Comet C/2021 O1 (Nishimura)

C/2021 O1 (Nishimura)
R.A: 13h 41m 57s   Dec: -04° 44’ 45”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 14.6 (JPL)  fading
in Virgo   object currently below the horizon

Comet 132P/Helin-Roman-Alu 2

132P/Helin-Roman-Alu 2
R.A: 00h 21m 46s   Dec: -02° 59’ 07”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 14.9 (JPL)  brightening
in Pisces   object currently below the horizon

Comet C/2019 F1 (ATLAS-Africano)

C/2019 F1 (ATLAS-Africano)
R.A: 21h 25m 30s   Dec: -74° 59’ 32”
Observed Magnitude 14.9 (COBS)
Estimated Magnitude 15.2 (JPL)  fading
in Octans   object currently below the horizon

Comet 15P/Finlay

15P/Finlay
R.A: 08h 42m 24s   Dec: +25° 52’ 06”
Observed Magnitude 15.2 (COBS)
Estimated Magnitude 17.7 (JPL)  fading
in Cancer   current altitude greater than 30 degrees above the horizon

Comet C/2020 F5 (MASTER)

C/2020 F5 (MASTER)
R.A: 22h 26m 48s   Dec: -26° 49’ 24”
Observed Magnitude 15.2 (COBS)
Estimated Magnitude 15.6 (JPL)  fading
in Pisces Austrinus   object currently below the horizon

Comet 108P/Ciffreo

108P/Ciffreo
R.A: 06h 52m 41s   Dec: +28° 03’ 29”
Observed Magnitude 15.3 (COBS)
Estimated Magnitude 15.7 (JPL)  fading
in Gemini   current altitude greater than 30 degrees above the horizon

Comet C/2021 E3 (ZTF)

C/2021 E3 (ZTF)
R.A: 18h 35m 38s   Dec: +09° 30’ 17”
Observed Magnitude 16.0 (COBS)
Estimated Magnitude 15.3 (JPL)  brightening
in Ophiucus   object currently below the horizon

Comet P/2021 N2 (Fuls)

P/2021 N2 (Fuls)
R.A: 02h 21m 05s   Dec: +16° 06’ 14”
Observed Magnitude 15.6 (COBS)
Estimated Magnitude 17.3 (JPL) 
in Aries   current altitude less than 30 degrees above the horizon

Comet C/2020 Y2 (ATLAS)

C/2020 Y2 (ATLAS)
R.A: 12h 31m 06s   Dec: -32° 46’ 57”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.6 (JPL)  brightening
in Hydra   object currently below the horizon

Comet 29P/Schwassmann-Wachmann 1

29P/Schwassmann-Wachmann 1
R.A: 04h 55m 22s   Dec: +32° 11’ 54”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.7 (JPL)  brightening
in Auriga   current altitude greater than 30 degrees above the horizon

Comet 104P/Kowal 2

104P/Kowal 2
R.A: 21h 40m 39s   Dec: -08° 37’ 50”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.7 (JPL)  brightening
in Capricornus   object currently below the horizon
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