Comets
This section 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.
Legend of symbols: ⓘ
C/2023 H5 (Lemmon)
C/2023 H5 (Lemmon)
Magnitude: 16.7 (Observed - COBS)
Coma Diameter: 0.7'
Tail Length: 1.3'
Observation Date: 2025-06-13
Apparent: 10h 48m 39s +64° 26’ 52”
J2000: 10h 46m 59s +64° 34’ 58”
in Ursa Major
Coma Diameter: 0.7'
Tail Length: 1.3'
Observation Date: 2025-06-13
Apparent: 10h 48m 39s +64° 26’ 52”
J2000: 10h 46m 59s +64° 34’ 58”
in Ursa Major
C/2025 L1 (ATLAS)
C/2025 L1 (ATLAS)
Magnitude: 18.0 (Predicted - JPL)
Apparent: 03h 14m 20s -53° 21’ 42”
J2000: 03h 13m 36s -53° 27’ 20”
in Horologium
Apparent: 03h 14m 20s -53° 21’ 42”
J2000: 03h 13m 36s -53° 27’ 20”
in Horologium
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