301.

136108 Haumea at opposition 136108 Haumea lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Thu, 16 Mar 1989 at 11:02 EDT (12,849 days ago) in Coma Berenices

302.

136472 Makemake at opposition 136472 Makemake lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Wed, 22 Feb 1989 at 02:26 EDT (12,871 days ago) in Ursa Major

303.

134340 Pluto at solar conjunction 134340 Pluto is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Fri, 04 Nov 1988 at 15:16 EDT (12,981 days ago) in Libra

304.

136199 Eris at opposition 136199 Eris lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Sun, 09 Oct 1988 at 06:17 EDT (13,007 days ago) in Cetus

305.

136108 Haumea at solar conjunction 136108 Haumea is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Sun, 18 Sep 1988 at 02:43 EDT (13,028 days ago) in Coma Berenices

306.

1 Ceres at opposition 1 Ceres lies in the opposite direction to the Sun in the sky, making it closer and brighter than at other times. It is also optimally positioned to be observable for much of the night. Fri, 16 Sep 1988 at 01:25 EDT (13,030 days ago) in Cetus

307.

136472 Makemake at solar conjunction 136472 Makemake is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Thu, 25 Aug 1988 at 23:15 EDT (13,052 days ago) in Ursa Major

308.

1 Ceres at aphelion 1 Ceres passes the furthest point along its orbit from the Sun. Thu, 26 May 1988 at 13:21 EDT (13,143 days ago) in Aquarius

309.

134340 Pluto at opposition 134340 Pluto lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Sun, 01 May 1988 at 07:54 EDT (13,168 days ago) in Virgo

310.

136199 Eris at solar conjunction 136199 Eris is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Tue, 05 Apr 1988 at 14:52 EDT (13,194 days ago) in Cetus

311.

136108 Haumea at opposition 136108 Haumea lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Tue, 15 Mar 1988 at 06:30 EDT (13,215 days ago) in Coma Berenices

312.

136472 Makemake at opposition 136472 Makemake lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Sun, 21 Feb 1988 at 18:41 EDT (13,238 days ago) in Ursa Major

313.

1 Ceres at solar conjunction 1 Ceres is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Sun, 31 Jan 1988 at 10:13 EDT (13,259 days ago) in Capricornus

314.

134340 Pluto at solar conjunction 134340 Pluto is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Mon, 02 Nov 1987 at 19:01 EDT (13,349 days ago) in Virgo

315.

136199 Eris at opposition 136199 Eris lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Fri, 09 Oct 1987 at 18:22 EDT (13,373 days ago) in Cetus

316.

136108 Haumea at solar conjunction 136108 Haumea is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Thu, 17 Sep 1987 at 21:52 EDT (13,395 days ago) in Coma Berenices

317.

136472 Makemake at solar conjunction 136472 Makemake is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Tue, 25 Aug 1987 at 14:24 EDT (13,418 days ago) in Ursa Major

318.

1 Ceres at opposition 1 Ceres lies in the opposite direction to the Sun in the sky, making it closer and brighter than at other times. It is also optimally positioned to be observable for much of the night. Fri, 19 Jun 1987 at 12:03 EDT (13,485 days ago) in Sagittarius

319.

134340 Pluto at opposition 134340 Pluto lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Wed, 29 Apr 1987 at 09:31 EDT (13,536 days ago) in Virgo

320.

136199 Eris at solar conjunction 136199 Eris is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Mon, 06 Apr 1987 at 02:42 EDT (13,559 days ago) in Cetus