401.

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. Fri, 11 Sep 1981 at 17:02 EDT (15,591 days ago) in Leo

402.

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, 18 Aug 1981 at 08:26 EDT (15,615 days ago) in Leo Minor

403.

1 Ceres at perihelion 1 Ceres passes its orbit's closest point to the Sun. Thu, 25 Jun 1981 at 23:54 EDT (15,669 days ago) in Leo

404.

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, 12 Apr 1981 at 21:24 EDT (15,743 days ago) in Bootes

405.

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. Sat, 04 Apr 1981 at 01:56 EDT (15,751 days ago) in Cetus

406.

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 (15,777 days ago) in Leo

407.

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 (15,801 days ago) in Leo Minor

408.

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 (15,836 days ago) in Gemini

409.

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 (15,923 days ago) in Virgo

410.

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 (15,930 days ago) in Cetus

411.

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 (15,957 days ago) in Leo

412.

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 (15,982 days ago) in Leo Minor

413.

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 (16,074 days ago) in Taurus

414.

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 (16,110 days ago) in Bootes

415.

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 (16,117 days ago) in Cetus

416.

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 (16,144 days ago) in Leo

417.

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 (16,167 days ago) in Leo Minor

418.

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 (16,290 days ago) in Bootes

419.

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 (16,296 days ago) in Cetus

420.

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 (16,299 days ago) in Cetus