Your guide to the Solar System and the night sky
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Comets

Browse and discover detailed information about 218 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 109P/Swift-Tuttle

109P/Swift-Tuttle
R.A: 09h 43m 46s   Dec: -19° 34’ 25”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 36.7 (JPL) 
in Hydra   object currently below the horizon

Comet 141P/Machholz 2

141P/Machholz 2
R.A: 12h 56m 49s   Dec: -14° 17’ 26”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 37.0 (JPL)  fading
in Corvus   object currently below the horizon

Comet 72P/Denning-Fujikawa

72P/Denning-Fujikawa
R.A: 14h 49m 32s   Dec: -21° 22’ 31”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 38.6 (JPL)  brightening
in Libra   object currently below the horizon

Comet C/2021 A4 (NEOWISE)

C/2021 A4 (NEOWISE)
R.A: 21h 16m 38s   Dec: -41° 42’ 12”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 40.3 (JPL)  fading
in Microscopium   object currently below the horizon

Comet 55P/Tempel-Tuttle

55P/Tempel-Tuttle
R.A: 15h 08m 30s   Dec: -16° 29’ 08”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 46.7 (JPL) 
in Libra   object currently below the horizon

Comet 27P/Crommelin

27P/Crommelin
R.A: 17h 09m 35s   Dec: -17° 08’ 20”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 53.6 (JPL) 
in Ophiucus   object currently below the horizon

Comet 205P/Giacobini

205P/Giacobini
R.A: 06h 35m 34s   Dec: +07° 45’ 27”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Monoceros   current altitude less than 30 degrees above the horizon

Comet 73P/Schwassmann-Wachmann 3

73P/Schwassmann-Wachmann 3
R.A: 16h 19m 37s   Dec: -32° 24’ 44”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Scorpius   object currently below the horizon

Comet Great January Comet of 1910 (C/1910 A1)

C/1910 A1 (Great January Comet)
R.A: 20h 02m 02s   Dec: +06° 45’ 16”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Aquila   current altitude less than 30 degrees above the horizon

Comet Skjellerup-Maristany (C/1927 X1)

C/1927 X1 (Skjellerup-Maristany)
R.A: 17h 03m 41s   Dec: -65° 33’ 02”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Ara   object currently below the horizon

Comet C/1956 R1 (Arend-Roland)

C/1956 R1 (Arend-Roland)
R.A: 04h 04m 48s   Dec: +69° 26’ 34”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Camelopardalis   current altitude greater than 30 degrees above the horizon

Comet C/1969 Y1 (Bennett)

C/1969 Y1 (Bennett)
R.A: 02h 31m 57s   Dec: +30° 06’ 44”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Triangulum   current altitude greater than 30 degrees above the horizon

Comet West (C/1975 V1-A)

C/1975 V1-A (West)
R.A: 19h 34m 32s   Dec: -16° 26’ 57”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Sagittarius   current altitude less than 30 degrees above the horizon

Eclipse comet (Comet C/1948 V1)

C/1948 V1 (Eclipse comet)
R.A: 08h 46m 40s   Dec: -05° 14’ 40”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Hydra   object currently below the horizon

Comet Ikeya-Seki (C/1965 S1)

C/1965 S1 (Ikeya-Seki)
R.A: 06h 49m 37s   Dec: -11° 59’ 44”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Canis Majoris   object currently below the horizon

Comet C/2012 S1 (ISON)

C/2012 S1 (ISON)
R.A: 07h 36m 06s   Dec: +36° 52’ 00”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Lynx   current altitude less than 30 degrees above the horizon

Southern Comet (C/1947 X1-A)

C/1947 X1-A (Southern Comet)
R.A: 21h 47m 09s   Dec: -04° 30’ 53”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Aquarius   current altitude less than 30 degrees above the horizon
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