Category

Hyperbolic comets

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comet discovered in 2012, with a close approach to Earth in December 2013

3I/ATLAS, also known as C/2025 N1 (ATLAS) and previously as A11pl3Z, is an interstellar comet discovered on 1 July 2025 by the Asteroid Terrestrial-impact Last Alert System (ATLAS) station. The comet follows an unbound, hyperbolic trajectory past the Sun, and passed by Earth at 1.8 AU, posing no threat. The prefix "3I" designates it as the third confirmed interstellar object passing through the Solar System, after 1I/Oumuamua and 2I/Borisov.

2I/Borisov, originally designated C/2019 Q4 (Borisov), is the first observed rogue comet and the second observed interstellar interloper, after ʻOumuamua. It was discovered by the Crimean amateur astronomer and telescope maker Gennadiy Borisov on 29 August 2019 UTC (30 August local time) in MARGO Observatory.

C/2022 E3 (ZTF)

long period comet

C/2023 A3 (Tsuchinshan–ATLAS)

long period comet

Comet Arend–Roland

solar system comet

C/2021 A1 (Leonard)

hyperbolic comet

astronomical object

C/2024 G3 (ATLAS)

long-period sungrazing comet which disintegrated after perihelion in 2025

Oort cloud comet

long-period comet

C/1962 C1 (Seki-Lines)

astronomical object

parabolic comet

Comet Morehouse

C/2025 K1 (ATLAS)

parabolic comet

non-periodic comet

long-period comet

Comet C/2007 Q3 (Siding Spring)

astronomical object

C/2007 F1 (LONEOS)

oort cloud comet

Great comet of 1831

astronomical object

Comet Skorichenko–George

C/2015 G2 (MASTER)

non-periodic comet

C/2024 E1 (Wierzchoś)

oort cloud comet