1.

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 (600 days ago) in Hercules

2.

Comet C/2023 H2 (Lemmon) passes perigee Comet C/2023 H2 (Lemmon) makes its closest approach to the Earth. Fri, 10 Nov 2023 (600 days ago) in Hercules

3.

Comet C/2023 H2 (Lemmon) passes perihelion Comet C/2023 H2 (Lemmon) makes its closest approach to the Sun. Sun, 29 Oct 2023 (612 days ago)

4.

Comet 2P/Encke passes perihelion Comet 2P/Encke makes its closest approach to the Sun. Sun, 22 Oct 2023 (619 days ago) in Virgo

5.

Comet C/2023 P1 (Nishimura) passes perihelion Comet C/2023 P1 (Nishimura) makes its closest approach to the Sun. Sun, 17 Sep 2023 (654 days ago) in Virgo

6.

Comet C/2023 P1 (Nishimura) passes perigee Comet C/2023 P1 (Nishimura) makes its closest approach to the Earth. Tue, 12 Sep 2023 (659 days ago) in Leo

7.

Comet C/2023 E1 (ATLAS) passes perigee Comet C/2023 E1 (ATLAS) makes its closest approach to the Earth. Fri, 18 Aug 2023 (684 days ago) in Cygnus

8.

Comet C/2021 T4 (Lemmon) passes perihelion Comet C/2021 T4 (Lemmon) makes its closest approach to the Sun. Mon, 31 Jul 2023 (702 days ago) in Norma

9.

Comet C/2021 T4 (Lemmon) reaches peak brightness Comet C/2021 T4 (Lemmon) is forecast to reach the brightest point in its 2023 apparition. Thu, 20 Jul 2023 (713 days ago) in Telescopium

10.

Comet C/2021 T4 (Lemmon) passes perigee Comet C/2021 T4 (Lemmon) makes its closest approach to the Earth. Thu, 20 Jul 2023 (713 days ago) in Telescopium

11.

Comet C/2023 E1 (ATLAS) reaches peak brightness Comet C/2023 E1 (ATLAS) is forecast to reach the brightest point in its 2023 apparition. Sat, 15 Jul 2023 (718 days ago) in Draco

12.

Comet C/2023 E1 (ATLAS) passes perihelion Comet C/2023 E1 (ATLAS) makes its closest approach to the Sun. Sat, 01 Jul 2023 (732 days ago)

13.

Comet C/2020 V2 (ZTF) passes perihelion Comet C/2020 V2 (ZTF) makes its closest approach to the Sun. Mon, 08 May 2023 (786 days ago) in Aries

14.

Comet C/2022 A2 (PANSTARRS) passes perihelion Comet C/2022 A2 (PANSTARRS) makes its closest approach to the Sun. Sat, 18 Feb 2023 (865 days ago) in Cygnus

15.

Comet C/2022 E3 (ZTF) reaches peak brightness Comet C/2022 E3 (ZTF) is forecast to reach the brightest point in its 2023 apparition. Wed, 01 Feb 2023 (882 days ago) in Camelopardalis

16.

Comet C/2022 E3 (ZTF) passes perigee Comet C/2022 E3 (ZTF) makes its closest approach to the Earth. Wed, 01 Feb 2023 (882 days ago) in Camelopardalis

17.

Comet 96P/Machholz passes perihelion Comet 96P/Machholz makes its closest approach to the Sun. Tue, 31 Jan 2023 (883 days ago) in Aquarius

18.

Comet 96P/Machholz passes perigee Comet 96P/Machholz makes its closest approach to the Earth. Tue, 31 Jan 2023 (883 days ago) in Aquarius

19.

Comet 71P/Clark passes perihelion Comet 71P/Clark makes its closest approach to the Sun. Mon, 23 Jan 2023 (891 days ago) in Sagittarius

20.

Comet C/2022 U2 (ATLAS) passes perihelion Comet C/2022 U2 (ATLAS) makes its closest approach to the Sun. Sat, 14 Jan 2023 (900 days ago) in Cassiopeia