April 1977 lunar eclipse
Partial eclipse
Date4 April 1977
Gamma−0.91483
Magnitude0.19289
Saros cycle112 (63 of 72)
Partiality94 minutes, 45.6 seconds
Penumbral262 minutes, 57.7 seconds
Contacts (UTC)
P102:06:47.8
U103:30:56.7
Greatest04:18:15.7
U405:05:42.3
P406:29:45.5

A partial lunar eclipse took place on Monday, April 4, 1977, the first of two lunar eclipses in 1977. At maximum eclipse, a small bite out of the Moon should have been visible. The eclipse lasted for 1 hour and 34.76 minutes, with just 19.289% of the Moon in shadow at maximum.[1]

Visibilility

It was completely visible over North America, South America, Europe and Asia, seen rising over the Pacific and setting over the Middle East.

Eclipses in 1977

Lunar year series

Lunar eclipse series sets from 1977–1980
Ascending node   Descending node
Saros Date
Viewing		 Type
Chart		 Gamma Saros Date
Viewing		 Type
Chart		 Gamma
112 1977 Apr 04
 Partial
 −0.91483 117 1977 Sep 27
 Penumbral
 1.07682
122 1978 Mar 24
 Total
 −0.21402 127 1978 Sep 16
 Total
 0.29510
132 1979 Mar 13
 Partial
 0.52537 137 1979 Sep 06
 Total
 −0.43050
142 1980 Mar 01
 Penumbral
 1.22701 147 1980 Aug 26
 Penumbral
 −1.16082
Last set 1976 May 13 Last set 1976 Nov 06
Next set 1981 Jan 20 Next set 1980 Jul 27

Saros series

Lunar Saros series 112, repeating every 18 years and 11 days, has a total of 72 lunar eclipse events including 15 total lunar eclipses.

Greatest First
The greatest eclipse of the series occurred on 1490 Jun 02, lasting 100 minutes.[2] Penumbral Partial Total Central
859 May 20 985 Aug 03 1364 Mar 18 1436 Apr 30
Last
Central Total Partial Penumbral
1562 Jul 16 1616 Aug 27 2013 Apr 25
 2139 Jul 12

There are 11 series events between 1901 and 2100, grouped into threes (called an exeligmos), each column with approximately the same viewing longitude on earth.

1901–2100
1905 Feb 19 1923 Mar 3 1941 Mar 13
1959 Mar 24 1977 Apr 04 1995 Apr 15
2013 Apr 25 2031 May 07 2049 May 17
2067 May 28 2085 Jun 08

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[3] This lunar eclipse is related to two partial solar eclipses of Solar Saros 119.

March 28, 1968 April 9, 1986

See also

Notes

  1. ↑ Hermit Eclipse: Saros cycle 112
  2. ↑ Listing of Eclipses of series 112
  3. ↑ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros


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