| Type: | penumbral |
| Date: | 20 December 1983 |
| Axis: | 1.0625° |
| Gamma: | 1.07468 |
| Magnitude: | 0.88903 |
| Saros Ser: | 144 |
| Saros No: | 14 of 71 |
| Penumbral: | 242 minutes, 20.6 seconds |
| P1: | 23:47:55.9 (19 Dec) |
| Greatest: | 01:49:03.3 |
| P4: | 03:50:16.5 |
| Previous: | June 1983 |
| Next: | May 1984 |
A penumbral lunar eclipse took place on Tuesday, December 20, 1983, the second of two lunar eclipses in 1983. At the maximum eclipse, 89% of the Moon's disk was partially shaded by the Earth, which caused a slight shadow gradient across its disc; this subtle effect may have been visible to careful observers. No part of the Moon was in complete shadow. The eclipse lasted 4 hours and 2 minutes overall.[1]
Lunar Saros series 144, repeating every 18 years and 11 days, has a total of 71 lunar eclipse events including 20 total lunar eclipses.
First Penumbral Lunar Eclipse: 1749 Jul 29
First Partial Lunar Eclipse: 2146 Mar 28
First Total Lunar Eclipse: 2308 Jul 04
First Central Lunar Eclipse: 2362 Aug 06
Greatest Eclipse of the Lunar Saros 144: 2416 Sep 07
Last Central Lunar Eclipse: 2488 Oct 20
Last Total Lunar Eclipse: 2651 Jan 28
Last Partial Lunar Eclipse: 2867 Jun 08
Last Penumbral Lunar Eclipse: 3011 Sep 04
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[2] This lunar eclipse is related to two partial solar eclipses of Solar Saros 151.