21.

Comet 398P/Boattini passes perihelion Comet 398P/Boattini makes its closest approach to the Sun. Sun, 27 Dec 2020 (1,227 days ago) in Perseus

22.

Comet C/2021 A2 (NEOWISE) passes perihelion Comet C/2021 A2 (NEOWISE) makes its closest approach to the Sun. Fri, 22 Jan 2021 (1,201 days ago) in Vela

23.

Comet C/2021 D1 (SWAN) passes perihelion Comet C/2021 D1 (SWAN) makes its closest approach to the Sun. Sat, 27 Feb 2021 (1,165 days ago) in Pegasus

24.

Comet C/2020 R4 (ATLAS) passes perihelion Comet C/2020 R4 (ATLAS) makes its closest approach to the Sun. Tue, 02 Mar 2021 (1,162 days ago) in Aquarius

25.

Comet 10P/Tempel passes perihelion Comet 10P/Tempel makes its closest approach to the Sun. Tue, 23 Mar 2021 (1,141 days ago) in Aquarius

26.

Comet 15P/Finlay passes perigee Comet 15P/Finlay makes its closest approach to the Earth. Thu, 17 Jun 2021 (1,055 days ago) in Pisces

27.

Comet 15P/Finlay reaches peak brightness Comet 15P/Finlay is forecast to reach the brightest point in its 2021 apparition. Tue, 06 Jul 2021 (1,036 days ago) in Aries

28.

Comet C/2020 T2 (Palomar) passes perihelion Comet C/2020 T2 (Palomar) makes its closest approach to the Sun. Sat, 10 Jul 2021 (1,032 days ago) in Virgo

29.

Comet 15P/Finlay passes perihelion Comet 15P/Finlay makes its closest approach to the Sun. Tue, 13 Jul 2021 (1,029 days ago) in Taurus

30.

Comet 8P/Tuttle passes perihelion Comet 8P/Tuttle makes its closest approach to the Sun. Sat, 28 Aug 2021 (983 days ago) in Hydra

31.

Comet 8P/Tuttle reaches peak brightness Comet 8P/Tuttle is forecast to reach the brightest point in its 2021 apparition. Tue, 31 Aug 2021 (980 days ago) in Hydra

32.

Comet 4P/Faye passes perihelion Comet 4P/Faye makes its closest approach to the Sun. Thu, 09 Sep 2021 (971 days ago) in Taurus

33.

Comet 67P/Churyumov-Gerasimenko passes perihelion Comet 67P/Churyumov-Gerasimenko makes its closest approach to the Sun. Tue, 02 Nov 2021 (917 days ago) in Gemini

34.

Comet 67P/Churyumov-Gerasimenko reaches peak brightness Comet 67P/Churyumov-Gerasimenko is forecast to reach the brightest point in its 2021 apparition. Sun, 07 Nov 2021 (912 days ago) in Gemini

35.

Comet 67P/Churyumov-Gerasimenko passes perigee Comet 67P/Churyumov-Gerasimenko makes its closest approach to the Earth. Fri, 12 Nov 2021 (907 days ago) in Gemini

36.

Comet C/2021 A1 (Leonard) passes perigee Comet C/2021 A1 (Leonard) makes its closest approach to the Earth. Sun, 12 Dec 2021 (877 days ago) in Ophiuchus

37.

Comet C/2021 A1 (Leonard) passes perihelion Comet C/2021 A1 (Leonard) makes its closest approach to the Sun. Mon, 03 Jan 2022 (855 days ago)

38.

Comet C/2019 L3 (ATLAS) reaches peak brightness Comet C/2019 L3 (ATLAS) is forecast to reach the brightest point in its 2022 apparition. Wed, 05 Jan 2022 (853 days ago) in Gemini

39.

Comet C/2019 L3 (ATLAS) passes perihelion Comet C/2019 L3 (ATLAS) makes its closest approach to the Sun. Sun, 09 Jan 2022 (849 days ago) in Gemini

40.

Comet 104P/Kowal passes perihelion Comet 104P/Kowal makes its closest approach to the Sun. Tue, 11 Jan 2022 (847 days ago) in Cetus