281.

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. Mon, 07 May 1990 at 03:46 PDT (12,850 days ago) in Serpens Caput

282.

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. Fri, 06 Apr 1990 at 15:36 PDT (12,881 days ago) in Cetus

283.

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. Sat, 17 Mar 1990 at 15:00 PDT (12,901 days ago) in Coma Berenices

284.

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, 23 Feb 1990 at 09:13 PDT (12,923 days ago) in Ursa Major

285.

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. Sun, 17 Dec 1989 at 03:37 PDT (12,991 days ago) in Taurus

286.

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 (13,031 days ago) in Libra

287.

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 (13,060 days ago) in Cetus

288.

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 (13,080 days ago) in Coma Berenices

289.

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 (13,103 days ago) in Ursa Major

290.

134340 Pluto at perihelion 134340 Pluto passes its orbit's closest point to the Sun. Wed, 16 Aug 1989 at 23:59 PDT (13,114 days ago) in Libra

291.

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 (13,218 days ago) in Virgo

292.

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 (13,227 days ago) in Cetus

293.

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 (13,246 days ago) in Cetus

294.

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 (13,267 days ago) in Coma Berenices

295.

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 (13,289 days ago) in Ursa Major

296.

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 (13,399 days ago) in Libra

297.

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 (13,425 days ago) in Cetus

298.

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 (13,446 days ago) in Coma Berenices

299.

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 (13,450 days ago) in Cetus

300.

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 (13,470 days ago) in Ursa Major