301.

1 Ceres at aphelion 1 Ceres passes the furthest point along its orbit from the Sun. Thu, 26 May 1988 at 13:21 EDT (13,180 days ago) in Aquarius

302.

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 (13,205 days ago) in Virgo

303.

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 (13,231 days ago) in Cetus

304.

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 (13,252 days ago) in Coma Berenices

305.

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 (13,275 days ago) in Ursa Major

306.

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 (13,296 days ago) in Capricornus

307.

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 (13,386 days ago) in Virgo

308.

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 (13,410 days ago) in Cetus

309.

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 (13,432 days ago) in Coma Berenices

310.

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 (13,455 days ago) in Ursa Major

311.

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 (13,522 days ago) in Sagittarius

312.

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 (13,573 days ago) in Virgo

313.

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 (13,596 days ago) in Cetus

314.

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. Sun, 15 Mar 1987 at 01:59 EDT (13,618 days ago) in Coma Berenices

315.

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. Fri, 20 Feb 1987 at 11:02 EDT (13,641 days ago) in Ursa Major

316.

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. Sat, 01 Nov 1986 at 07:10 EDT (13,752 days ago) in Libra

317.

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. Thu, 30 Oct 1986 at 22:36 EDT (13,754 days ago) in Virgo

318.

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. Thu, 09 Oct 1986 at 06:16 EDT (13,775 days ago) in Cetus

319.

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. Tue, 16 Sep 1986 at 16:53 EDT (13,798 days ago) in Coma Berenices

320.

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. Sun, 24 Aug 1986 at 05:36 EDT (13,821 days ago) in Ursa Major