401.

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. Mon, 09 Mar 1981 at 00:28 EDT (15,818 days ago) in Leo

402.

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, 13 Feb 1981 at 11:53 EDT (15,842 days ago) in Leo Minor

403.

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, 09 Jan 1981 at 14:50 EDT (15,877 days ago) in Gemini

404.

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, 14 Oct 1980 at 20:19 EDT (15,964 days ago) in Virgo

405.

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. Tue, 07 Oct 1980 at 06:30 EDT (15,971 days ago) in Cetus

406.

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. Wed, 10 Sep 1980 at 12:16 EDT (15,998 days ago) in Leo

407.

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. Sat, 16 Aug 1980 at 23:00 EDT (16,023 days ago) in Leo Minor

408.

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. Fri, 16 May 1980 at 17:55 EDT (16,115 days ago) in Taurus

409.

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, 10 Apr 1980 at 00:41 EDT (16,151 days ago) in Bootes

410.

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, 03 Apr 1980 at 13:56 EDT (16,158 days ago) in Cetus

411.

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. Fri, 07 Mar 1980 at 20:27 EDT (16,185 days ago) in Leo

412.

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, 13 Feb 1980 at 03:59 EDT (16,208 days ago) in Leo Minor

413.

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, 13 Oct 1979 at 00:30 EDT (16,331 days ago) in Bootes

414.

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, 07 Oct 1979 at 18:32 EDT (16,337 days ago) in Cetus

415.

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, 04 Oct 1979 at 18:39 EDT (16,340 days ago) in Cetus

416.

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. Mon, 10 Sep 1979 at 07:34 EDT (16,364 days ago) in Leo

417.

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, 16 Aug 1979 at 13:37 EDT (16,389 days ago) in Leo Minor

418.

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, 08 Apr 1979 at 04:22 EDT (16,519 days ago) in Virgo

419.

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. Wed, 04 Apr 1979 at 01:50 EDT (16,523 days ago) in Cetus

420.

1 Ceres at aphelion 1 Ceres passes the furthest point along its orbit from the Sun. Wed, 14 Mar 1979 at 11:57 EDT (16,544 days ago) in Aquarius