281.

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. Tue, 07 Nov 1989 at 10:33 PDT (13,024 days ago) in Libra

282.

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. Mon, 09 Oct 1989 at 19:07 PDT (13,053 days ago) in Cetus

283.

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, 19 Sep 1989 at 07:15 PDT (13,073 days ago) in Coma Berenices

284.

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, 27 Aug 1989 at 07:24 PDT (13,096 days ago) in Ursa Major

285.

134340 Pluto at perihelion 134340 Pluto passes its orbit's closest point to the Sun. Wed, 16 Aug 1989 at 23:59 PDT (13,107 days ago) in Libra

286.

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. Thu, 04 May 1989 at 05:43 PDT (13,211 days ago) in Virgo

287.

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. Tue, 25 Apr 1989 at 13:13 PDT (13,220 days ago) in Cetus

288.

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. Thu, 06 Apr 1989 at 04:02 PDT (13,239 days ago) in Cetus

289.

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 10:32 PDT (13,260 days ago) in Coma Berenices

290.

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 01:46 PDT (13,282 days ago) in Ursa Major

291.

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 14:37 PDT (13,392 days ago) in Libra

292.

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 07:35 PDT (13,418 days ago) in Cetus

293.

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 02:24 PDT (13,439 days ago) in Coma Berenices

294.

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. Wed, 14 Sep 1988 at 20:28 PDT (13,443 days ago) in Cetus

295.

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 22:50 PDT (13,463 days ago) in Ursa Major

296.

1 Ceres at aphelion 1 Ceres passes the furthest point along its orbit from the Sun. Thu, 02 Jun 1988 at 10:52 PDT (13,547 days ago) in Aquarius

297.

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 (13,579 days ago) in Virgo

298.

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 (13,605 days ago) in Cetus

299.

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 (13,626 days ago) in Coma Berenices

300.

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 (13,649 days ago) in Ursa Major