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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:00  
clear_day Transit: 12:48  
SunsetSet: 18:34 south
sunny DaytimeWhat's Visible Now

Bright Comets

This page provides a comprehensive list of the bright comets currently visible in the sky. This list is updated with new information several times per day. Comets for which there is data from recent observations reported in the Comet Observation database (COBS) are listed first, in order of decreasing brightness. When data from recent observations is not available, the magnitude provided by the JPL Horizons datasets is used as an estimation of the brightness.

Credits for comet observation data: COBS Comet Observation Database – CC BY-NA-SA 4.0

Visibility from selected location
visibility = visible to the naked eye
stars = binocular, brighter than 10th magnitude
radio_button_checked Current altitude ≥ 30°   radio_button_checked Current altitude < 30°   radio_button_checked Below the horizon
 From: Greenwich, United Kingdom edit_location_alt
C/2023 P1 (Nishimura)
visibility

C/2023 P1 (Nishimura)   radio_button_checked

Magnitude: 4.6 (Observed - COBS) trending_down
Coma Diameter: 1.0'
Tail Length: n/a
Observation Date: 2023-09-23
RA: 13h 03m 31s   Decl: -16° 21’ 14”
in Virgo
C/2020 V2 (ZTF)
stars

C/2020 V2 (ZTF)   radio_button_checked

Magnitude: 9.0 (Observed - COBS) trending_down
Coma Diameter: 6.5'
Tail Length: n/a
Observation Date: 2023-09-26
RA: 01h 31m 04s   Decl: -32° 29’ 32”
in Sculptor
C/2017 K2 (PANSTARRS)
stars

C/2017 K2 (PANSTARRS)   radio_button_checked

Magnitude: 9.9 (Observed - COBS) trending_flat
Coma Diameter: n/a
Tail Length: n/a
Observation Date: 2023-09-26
RA: 06h 50m 07s   Decl: -08° 16’ 09”
in Monoceros
C/2023 H2 (Lemmon)

C/2023 H2 (Lemmon)   radio_button_checked

Magnitude: 11.0 (Observed - COBS) trending_up
Coma Diameter: 5.0'
Tail Length: n/a
Observation Date: 2023-09-27
RA: 12h 02m 22s   Decl: +45° 10’ 15”
in Ursa Major
2P/Encke

2P/Encke   radio_button_checked

Magnitude: 11.3 (Observed - COBS) trending_up
Coma Diameter: 3.7'
Tail Length: n/a
Observation Date: 2023-09-28
RA: 10h 30m 14s   Decl: +17° 12’ 02”
in Leo
C/2023 E1 (ATLAS)

C/2023 E1 (ATLAS)   radio_button_checked

Magnitude: 12.0 (Observed - COBS) trending_down
Coma Diameter: 1.5'
Tail Length: n/a
Observation Date: 2023-09-25
RA: 22h 25m 02s   Decl: -20° 47’ 35”
in Aquarius
29P/Schwassmann-Wachmann

29P/Schwassmann-Wachmann   radio_button_checked

Magnitude: 13.2 (Observed - COBS) trending_up
Coma Diameter: 1.8'
Tail Length: n/a
Observation Date: 2023-09-28
RA: 08h 30m 09s   Decl: +21° 32’ 34”
in Cancer
C/2022 A2 (PANSTARRS)

C/2022 A2 (PANSTARRS)   radio_button_checked

Magnitude: 13.2 (Observed - COBS) trending_down
Coma Diameter: 1.8'
Tail Length: 13.7'
Observation Date: 2023-09-26
RA: 22h 59m 17s   Decl: +01° 40’ 57”
in Pisces
103P/Hartley

103P/Hartley   radio_button_checked

Magnitude: 13.6 (Observed - COBS) trending_down
Coma Diameter: 0.6'
Tail Length: n/a
Observation Date: 2023-09-29
RA: 06h 39m 29s   Decl: +29° 55’ 17”
in Auriga
C/2021 X1 (Maury-Attard)

C/2021 X1 (Maury-Attard)   radio_button_checked

Magnitude: 13.8 (Observed - COBS) trending_flat
Coma Diameter: 1.8'
Tail Length: 21.7'
Observation Date: 2023-09-27
RA: 00h 20m 22s   Decl: +06° 06’ 09”
in Pisces
126P/IRAS

126P/IRAS   radio_button_checked

Magnitude: 15.0 (Observed - COBS) trending_down
Coma Diameter: 1.8'
Tail Length: 9.3'
Observation Date: 2023-09-26
RA: 02h 04m 06s   Decl: +64° 40’ 27”
in Cassiopeia
117P/Helin-Roman-Alu

117P/Helin-Roman-Alu   radio_button_checked

Magnitude: 15.2 (Observed - COBS) trending_down
Coma Diameter: 0.4'
Tail Length: 8.0'
Observation Date: 2023-09-27
RA: 00h 23m 49s   Decl: -08° 03’ 50”
in Cetus
12P/Pons-Brooks

12P/Pons-Brooks   radio_button_checked

Magnitude: 15.3 (Observed - COBS) trending_up
Coma Diameter: 0.3'
Tail Length: n/a
Observation Date: 2023-09-29
RA: 17h 20m 30s   Decl: +46° 36’ 46”
in Hercules
71P/Clark

71P/Clark   radio_button_checked

Magnitude: 15.5 (Observed - COBS) trending_down
Coma Diameter: 1.5'
Tail Length: n/a
Observation Date: 2023-09-24
RA: 01h 03m 46s   Decl: -05° 28’ 51”
in Cetus
C/2019 T4 (ATLAS)

C/2019 T4 (ATLAS)   radio_button_checked

Magnitude: 15.5 (Observed - COBS) trending_flat
Coma Diameter: 0.6'
Tail Length: n/a
Observation Date: 2023-09-27
RA: 15h 46m 18s   Decl: +16° 57’ 23”
in Serpens
62P/Tsuchinshan

62P/Tsuchinshan   radio_button_checked

Magnitude: 15.8 (Observed - COBS) trending_up
Coma Diameter: 1.1'
Tail Length: n/a
Observation Date: 2023-09-26
RA: 06h 07m 47s   Decl: +21° 39’ 05”
in Gemini
P/2023 M4 (ATLAS)

P/2023 M4 (ATLAS)   radio_button_checked

Magnitude: 15.8 (Observed - COBS) trending_down
Coma Diameter: 0.2'
Tail Length: n/a
Observation Date: 2023-09-22
RA: 21h 06m 38s   Decl: -11° 59’ 31”
in Aquarius
237P/LINEAR

237P/LINEAR   radio_button_checked

Magnitude: 16.0 (Observed - COBS) trending_down
Coma Diameter: 0.2'
Tail Length: n/a
Observation Date: 2023-09-29
RA: 19h 50m 37s   Decl: -02° 29’ 20”
in Aquila
C/2022 U3 (Bok)

C/2022 U3 (Bok)   radio_button_checked

Magnitude: 16.9 (Observed - COBS) trending_up
Coma Diameter: 0.3'
Tail Length: n/a
Observation Date: 2023-09-26
RA: 05h 09m 04s   Decl: +39° 06’ 40”
in Auriga
C/2020 Y2 (ATLAS)

C/2020 Y2 (ATLAS)   radio_button_checked

Magnitude: 17.3 (Observed - COBS) trending_flat
Coma Diameter: 0.4'
Tail Length: n/a
Observation Date: 2023-09-25
RA: 02h 29m 11s   Decl: -02° 38’ 54”
in Cetus
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