21.

Comet 2P/Encke passes perihelion Comet 2P/Encke makes its closest approach to the Sun. Sun, 22 Oct 2023 (187 days ago) in Virgo

22.

Comet C/2023 H2 (Lemmon) passes perihelion Comet C/2023 H2 (Lemmon) makes its closest approach to the Sun. Sun, 29 Oct 2023 (180 days ago)

23.

Comet C/2023 H2 (Lemmon) passes perigee Comet C/2023 H2 (Lemmon) makes its closest approach to the Earth. Fri, 10 Nov 2023 (168 days ago) in Hercules

24.

Comet C/2023 H2 (Lemmon) reaches peak brightness Comet C/2023 H2 (Lemmon) is forecast to reach the brightest point in its 2023 apparition. Fri, 10 Nov 2023 (168 days ago) in Hercules

25.

Comet 62P/Tsuchinshan passes perihelion Comet 62P/Tsuchinshan makes its closest approach to the Sun. Mon, 25 Dec 2023 (123 days ago) in Leo

26.

Comet 62P/Tsuchinshan reaches peak brightness Comet 62P/Tsuchinshan is forecast to reach the brightest point in its 2023 apparition. Sun, 31 Dec 2023 (117 days ago) in Leo

27.

Comet C/2023 S3 (Lemmon) passes perihelion Comet C/2023 S3 (Lemmon) makes its closest approach to the Sun. Fri, 19 Jan 2024 (98 days ago) in Microscopium

28.

Comet 144P/Kushida passes perihelion Comet 144P/Kushida makes its closest approach to the Sun. Thu, 25 Jan 2024 (92 days ago) in Taurus

29.

Comet C/2021 S3 (PANSTARRS) passes perihelion Comet C/2021 S3 (PANSTARRS) makes its closest approach to the Sun. Wed, 14 Feb 2024 (72 days ago) in Ophiuchus

30.

Comet 12P/Pons-Brooks reaches peak brightness Comet 12P/Pons-Brooks is forecast to reach the brightest point in its 2024 apparition. Sun, 21 Apr 2024 (5 days ago) in Taurus

31.

Comet 12P/Pons-Brooks passes perihelion Comet 12P/Pons-Brooks makes its closest approach to the Sun. Sun, 21 Apr 2024 (5 days ago) in Taurus

32.

Comet 46P/Wirtanen passes perihelion Comet 46P/Wirtanen makes its closest approach to the Sun. Sun, 19 May 2024 (23 days away) in Taurus

33.

Comet 154P/Brewington passes perihelion Comet 154P/Brewington makes its closest approach to the Sun. Tue, 11 Jun 2024 (46 days away) in Aries

34.

Comet 13P/Olbers passes perihelion Comet 13P/Olbers makes its closest approach to the Sun. Sun, 30 Jun 2024 (65 days away) in Lynx

35.

Comet 13P/Olbers reaches peak brightness Comet 13P/Olbers is forecast to reach the brightest point in its 2024 apparition. Mon, 01 Jul 2024 (66 days away) in Lynx

36.

Comet C/2023 A3 (Tsuchinshan-ATLAS) passes perihelion Comet C/2023 A3 (Tsuchinshan-ATLAS) makes its closest approach to the Sun. Fri, 27 Sep 2024 (154 days away) in Sextans

37.

Comet C/2023 A3 (Tsuchinshan-ATLAS) passes perigee Comet C/2023 A3 (Tsuchinshan-ATLAS) makes its closest approach to the Earth. Sat, 12 Oct 2024 (169 days away) in Virgo

38.

Comet 333P/LINEAR passes perihelion Comet 333P/LINEAR makes its closest approach to the Sun. Fri, 29 Nov 2024 (217 days away)

39.

Comet 21P/Giacobini-Zinner passes perihelion Comet 21P/Giacobini-Zinner makes its closest approach to the Sun. Tue, 25 Mar 2025 (333 days away) in Pisces

40.

Comet 210P/Christensen passes perihelion Comet 210P/Christensen makes its closest approach to the Sun. Sat, 22 Nov 2025 (575 days away) in Libra