181.

Comet 19P/Borrelly passes perihelion Comet 19P/Borrelly makes its closest approach to the Sun. Sun, 21 Dec 1980 (15,841 days ago) in Cetus

182.

Comet 210P/Christensen passes perihelion Comet 210P/Christensen makes its closest approach to the Sun. Fri, 28 Nov 1980 (15,864 days ago) in Libra

183.

Comet 46P/Wirtanen passes perihelion Comet 46P/Wirtanen makes its closest approach to the Sun. Fri, 21 Nov 1980 (15,871 days ago) in Leo

184.

Comet 96P/Machholz passes perihelion Comet 96P/Machholz makes its closest approach to the Sun. Fri, 14 Nov 1980 (15,878 days ago) in Libra

185.

Comet 46P/Wirtanen reaches peak brightness Comet 46P/Wirtanen is forecast to reach the brightest point in its 1980 apparition. Thu, 13 Nov 1980 (15,879 days ago) in Cancer

186.

Comet 96P/Machholz passes perigee Comet 96P/Machholz makes its closest approach to the Earth. Tue, 11 Nov 1980 (15,881 days ago)

187.

Comet 46P/Wirtanen passes perigee Comet 46P/Wirtanen makes its closest approach to the Earth. Thu, 06 Nov 1980 (15,886 days ago) in Hydra

188.

Comet 2P/Encke passes perihelion Comet 2P/Encke makes its closest approach to the Sun. Thu, 06 Nov 1980 (15,886 days ago) in Virgo

189.

Comet 8P/Tuttle passes perihelion Comet 8P/Tuttle makes its closest approach to the Sun. Wed, 15 Oct 1980 (15,908 days ago) in Sextans