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

Comets

Browse and discover detailed information about 199 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/2020 M3 (ATLAS)

C/2020 M3 (ATLAS)
C/2020 M3 (ATLAS) is brighter than mag 10
R.A: 05h 11m 53s   Dec: -16° 21’ 07”
Observed Magnitude 8.6 (COBS)
Estimated Magnitude 13.6 (JPL)  brightening
in Lepus   object currently below the horizon

Comet 88P/Howell

88P/Howell
88P/Howell is brighter than mag 10
R.A: 18h 30m 38s   Dec: -27° 10’ 28”
Observed Magnitude 9.4 (COBS)
Estimated Magnitude 14.9 (JPL)  fading
in Sagittarius   object currently below the horizon

Comet C/2020 Q1 (Borisov)

C/2020 Q1 (Borisov)
R.A: 19h 50m 14s   Dec: +23° 59’ 22”
Observed Magnitude 12.1 (COBS)
Estimated Magnitude 22.4 (JPL)  fading
in Vulpecula   current altitude less than 30 degrees above the horizon

Comet C/2019 U6 (Lemmon)

C/2019 U6 (Lemmon)
R.A: 17h 22m 59s   Dec: +23° 06’ 24”
Observed Magnitude 12.8 (COBS)
Estimated Magnitude 17.9 (JPL)  fading
in Hercules   current altitude less than 30 degrees above the horizon

Comet C/2020 P1 (NEOWISE)

C/2020 P1 (NEOWISE)
R.A: 13h 17m 25s   Dec: +07° 21’ 28”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 13.4 (JPL)  fading
in Virgo   current altitude greater than 30 degrees above the horizon

Comet C/2019 N1 (ATLAS)

C/2019 N1 (ATLAS)
R.A: 13h 22m 58s   Dec: -03° 01’ 55”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 14.3 (JPL)  brightening
in Virgo   current altitude greater than 30 degrees above the horizon

Comet C/2018 N2 (ASASSN)

C/2018 N2 (ASASSN)
R.A: 15h 10m 06s   Dec: +63° 30’ 38”
Observed Magnitude 14.5 (COBS)
Estimated Magnitude 15.9 (JPL)  fading
in Draco   current altitude greater than 30 degrees above the horizon

Comet C/2019 L3 (ATLAS)

C/2019 L3 (ATLAS)
R.A: 00h 05m 39s   Dec: +65° 00’ 07”
Observed Magnitude 14.5 (COBS)
Estimated Magnitude 15.5 (JPL) 
in Cassiopeia   current altitude less than 30 degrees above the horizon

Comet C/2020 F5 (MASTER)

C/2020 F5 (MASTER)
R.A: 18h 22m 00s   Dec: -67° 52’ 47”
Observed Magnitude 14.9 (COBS)
Estimated Magnitude 15.7 (JPL) 
in Pavo   object currently below the horizon

Comet C/2017 T2 (PANSTARRS)

C/2017 T2 (PANSTARRS)
R.A: 15h 29m 41s   Dec: -14° 29’ 55”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.0 (JPL)  fading
in Libra   current altitude less than 30 degrees above the horizon

Comet C/2017 K2 (PANSTARRS)

C/2017 K2 (PANSTARRS)
R.A: 17h 15m 31s   Dec: +39° 26’ 34”
Observed Magnitude 15.1 (COBS)
Estimated Magnitude 16.1 (JPL) 
in Hercules   current altitude greater than 30 degrees above the horizon

Comet C/2018 F4 (PANSTARRS)

C/2018 F4 (PANSTARRS)
R.A: 02h 02m 43s   Dec: -36° 38’ 14”
Observed Magnitude 15.2 (COBS)
Estimated Magnitude 17.0 (JPL)  fading
in Fornax   object currently below the horizon

Comet C/2020 J1 (SONEAR)

C/2020 J1 (SONEAR)
R.A: 17h 14m 34s   Dec: -49° 09’ 37”
Observed Magnitude 15.2 (COBS)
Estimated Magnitude 15.6 (JPL) 
in Ara   object currently below the horizon

Comet C/2020 S3 (Erasmus)

Comet C/2020 S3
R.A: 10h 02m 30s   Dec: -05° 13’ 10”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.2 (JPL)  brightening
in Sextans   current altitude less than 30 degrees above the horizon

Comet SWAN (C/2020 F8)

C/2020 F8 (SWAN)
R.A: 06h 01m 33s   Dec: -03° 15’ 05”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.3 (JPL)  fading
in Orion   object currently below the horizon

Comet 29P/Schwassmann-Wachmann 1

29P/Schwassmann-Wachmann 1
R.A: 02h 36m 58s   Dec: +27° 09’ 29”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 15.3 (JPL)  brightening
in Aries   object currently below the horizon

Comet C/2017 B3 (LINEAR)

C/2017 B3 (LINEAR)
R.A: 23h 51m 23s   Dec: +02° 03’ 35”
Observed Magnitude 15.5 (COBS)
Estimated Magnitude 17.8 (JPL)  fading
in Pisces   object currently below the horizon

Comet C/2019 F1 (ATLAS-Africano)

C/2019 F1 (ATLAS-Africano)
R.A: 14h 52m 23s   Dec: -35° 06’ 51”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.0 (JPL) 
in Centaurus   object currently below the horizon

Comet 17P/Holmes

17P/Holmes
R.A: 19h 06m 16s   Dec: -28° 10’ 13”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.3 (JPL) 
in Sagittarius   object currently below the horizon

Comet C/2020 R4 (ATLAS)

C/2020 R4 (ATLAS)
R.A: 23h 54m 16s   Dec: -20° 21’ 07”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 16.3 (JPL)  brightening
in Aquarius   object currently below the horizon
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