181.

Comet 96P/Machholz passes perihelion Comet 96P/Machholz makes its closest approach to the Sun. Fri, 14 Nov 1980 (15,874 days ago) in Libra

182.

Comet 46P/Wirtanen reaches peak brightness Comet 46P/Wirtanen is forecast to reach the brightest point in its 1980 apparition. Thu, 13 Nov 1980 (15,875 days ago) in Cancer

183.

Comet 96P/Machholz passes perigee Comet 96P/Machholz makes its closest approach to the Earth. Tue, 11 Nov 1980 (15,877 days ago)

184.

Comet 46P/Wirtanen passes perigee Comet 46P/Wirtanen makes its closest approach to the Earth. Thu, 06 Nov 1980 (15,882 days ago) in Hydra

185.

Comet 2P/Encke passes perihelion Comet 2P/Encke makes its closest approach to the Sun. Thu, 06 Nov 1980 (15,882 days ago) in Virgo

186.

Comet 8P/Tuttle passes perihelion Comet 8P/Tuttle makes its closest approach to the Sun. Wed, 15 Oct 1980 (15,904 days ago) in Sextans