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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 13P/Olbers

13P/Olbers
R.A: 01h 32m 09s   Dec: -42° 48’ 27”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.9 (JPL)  brightening
in Phoenix   object currently below the horizon

Comet C/2013 A1 (Siding Spring)

C/2013 A1 (Siding Spring)
R.A: 10h 24m 31s   Dec: +34° 37’ 06”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.9 (JPL) 
in Leo Minor   current altitude greater than 30 degrees above the horizon

Comet C/2018 W1 (Catalina)

C/2018 W1 (Catalina)
R.A: 15h 35m 35s   Dec: -03° 54’ 14”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.9 (JPL)  fading
in Libra   current altitude less than 30 degrees above the horizon

Comet C/2017 O1 (ASASSN1)

C/2017 O1 (ASASSN1)
R.A: 12h 57m 23s   Dec: +08° 34’ 15”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.9 (JPL)  fading
in Virgo   current altitude greater than 30 degrees above the horizon

Comet 333P/LINEAR

333P/LINEAR
R.A: 17h 54m 58s   Dec: -42° 41’ 47”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 25.9 (JPL) 
in Scorpius   object currently below the horizon

Comet 96P/Machholz

96P/Machholz
R.A: 18h 21m 04s   Dec: -36° 21’ 09”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.0 (JPL) 
in Sagittarius   object currently below the horizon

Comet 12P/Pons-Brooks

12P/Pons-Brooks
R.A: 17h 45m 03s   Dec: +16° 50’ 34”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.0 (JPL) 
in Hercules   current altitude less than 30 degrees above the horizon

Comet 51P/Harrington

51P/Harrington
R.A: 13h 46m 34s   Dec: -06° 55’ 02”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.1 (JPL)  brightening
in Virgo   current altitude less than 30 degrees above the horizon

Comet 37P/Forbes

37P/Forbes
R.A: 06h 46m 43s   Dec: +30° 01’ 01”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.2 (JPL) 
in Gemini   current altitude less than 30 degrees above the horizon

Comet 104P/Kowal 2

104P/Kowal 2
R.A: 18h 24m 12s   Dec: -18° 10’ 41”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.2 (JPL) 
in Sagittarius   object currently below the horizon

Comet 56P/Slaughter-Burnham

56P/Slaughter-Burnham
R.A: 12h 48m 58s   Dec: -08° 43’ 27”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.3 (JPL) 
in Virgo   current altitude less than 30 degrees above the horizon

Comet 319P/Catalina-McNaught

319P/Catalina-McNaught
R.A: 12h 03m 06s   Dec: +11° 32’ 25”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.4 (JPL)  brightening
in Virgo   current altitude greater than 30 degrees above the horizon

Comet C/2019 Y1 (ATLAS)

C/2019 Y1 (ATLAS)
R.A: 13h 59m 35s   Dec: -10° 56’ 54”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 26.6 (JPL)  fading
in Virgo   current altitude less than 30 degrees above the horizon

Comet 226P/Pigott-LINEAR-Kowalski

226P/Pigott-LINEAR-Kowalski
R.A: 14h 56m 35s   Dec: -10° 33’ 49”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 27.3 (JPL) 
in Libra   current altitude less than 30 degrees above the horizon

Comet 364P/2018 A2 (PANSTARRS)

364P/2018 A2 (PANSTARRS)
R.A: 05h 36m 37s   Dec: +30° 24’ 32”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 27.4 (JPL)  brightening
in Auriga   current altitude less than 30 degrees above the horizon

Comet 289P/Blanpain

289P/Blanpain
R.A: 14h 18m 53s   Dec: -11° 19’ 28”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 27.5 (JPL)  fading
in Virgo   current altitude less than 30 degrees above the horizon

Comet 26P/Grigg-Skjellerup

26P/Grigg-Skjellerup
R.A: 01h 10m 04s   Dec: +11° 56’ 02”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 27.5 (JPL)  fading
in Pisces   object currently below the horizon

Comet C/2017 K4 (ATLAS)

C/2017 K4 (ATLAS)
R.A: 04h 59m 50s   Dec: +36° 03’ 56”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 27.6 (JPL) 
in Auriga   current altitude less than 30 degrees above the horizon

Comet 23P/Brorsen-Metcalf

23P/Brorsen-Metcalf
R.A: 17h 12m 41s   Dec: -37° 47’ 14”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 27.6 (JPL)  fading
in Scorpius   object currently below the horizon

Comet C/2019 D1 (Flewelling)

C/2019 D1 (Flewelling)
R.A: 04h 14m 07s   Dec: +14° 56’ 24”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 27.6 (JPL)  fading
in Taurus   object currently below the horizon
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