301.

1 Ceres at aphelion 1 Ceres passes the furthest point along its orbit from the Sun. Thu, 02 Jun 1988 at 10:52 PDT (13,556 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 07:22 PDT (13,588 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 16:23 PDT (13,614 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 06:15 PDT (13,635 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 18:18 PDT (13,658 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. Sat, 30 Jan 1988 at 06:04 PDT (13,680 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 18:25 PDT (13,769 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 20:03 PDT (13,793 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 21:47 PDT (13,815 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 14:15 PDT (13,838 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. Thu, 18 Jun 1987 at 01:47 PDT (13,906 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 09:01 PDT (13,956 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 04:37 PDT (13,979 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 01:58 PDT (14,001 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 10:53 PDT (14,024 days ago) in Ursa Major

316.

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 22:03 PDT (14,137 days ago) in Virgo

317.

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. Thu, 30 Oct 1986 at 14:07 PDT (14,137 days ago) in Libra

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 08:20 PDT (14,158 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 17:03 PDT (14,181 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 05:41 PDT (14,204 days ago) in Ursa Major