281.

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, 24 Feb 1991 at 17:52 EDT (12,139 days ago) in Ursa Major

282.

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. Sat, 10 Nov 1990 at 07:08 EDT (12,245 days ago) in Serpens Caput

283.

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. Wed, 10 Oct 1990 at 06:06 EDT (12,276 days ago) in Cetus

284.

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, 20 Sep 1990 at 12:50 EDT (12,296 days ago) in Coma Berenices

285.

1 Ceres at perihelion 1 Ceres passes its orbit's closest point to the Sun. Fri, 14 Sep 1990 at 15:01 EDT (12,302 days ago) in Leo

286.

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, 28 Aug 1990 at 16:43 EDT (12,319 days ago) in Ursa Major

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. Sat, 18 Aug 1990 at 18:15 EDT (12,329 days ago) in Leo

288.

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 04:27 EDT (12,432 days ago) in Serpens Caput

289.

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 14:50 EDT (12,463 days ago) in Cetus

290.

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 15:48 EDT (12,483 days ago) in Coma Berenices

291.

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 10:11 EDT (12,505 days ago) in Ursa Major

292.

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. Mon, 18 Dec 1989 at 13:47 EDT (12,572 days ago) in Taurus

293.

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 11:16 EDT (12,613 days ago) in Libra

294.

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 18:11 EDT (12,642 days ago) in Cetus

295.

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 07:51 EDT (12,662 days ago) in Coma Berenices

296.

134340 Pluto at perihelion 134340 Pluto passes its orbit's closest point to the Sun. Tue, 05 Sep 1989 at 14:58 EDT (12,676 days ago) in Libra

297.

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 08:07 EDT (12,685 days ago) in Ursa Major

298.

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 06:19 EDT (12,800 days ago) in Virgo

299.

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. Wed, 26 Apr 1989 at 20:15 EDT (12,808 days ago) in Cetus

300.

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 02:54 EDT (12,828 days ago) in Cetus