August 1970 lunar eclipse

August 1970 lunar eclipse
Partial eclipse
Date	17 August 1970
Gamma	−0.80534
Magnitude	0.40797
Saros cycle	118 (49 of 74)
Partiality	131 minutes, 22.5 seconds
Penumbral	270 minutes, 41.5 seconds
P1
Contacts (UTC)
P1	01:08:04.9
U1	02:17:44.6
Greatest	03:23:25.6
U4	04:29:07.1
P4	05:38:46.4
	← February 1970 February 1971 →

A partial lunar eclipse took place on Monday, August 17, 1970, the second of two lunar eclipses in 1970, the first was on February 21 of that year. The Earth's shadow on the Moon was clearly visible in this eclipse, with 41% of the Moon in shadow; the partial eclipse lasted for 2 hours and 11 minutes. It was the second of two lunar eclipses in 1970.^[1]

More details about the Partial Lunar Eclipse of 17 August 1970.

Penumbral Magnitude: 1.35215

Umbral Magnitude: 0.40797

Gamma: -0.80534

Date: Monday, 17 August 1970

Saros Series: 118th (49 of 73)

Greatest Eclipse: 1970 August 17 at 03:23:25.6 UTC

Sun Right Ascension: 9.74

Sun Declination: 13.6

Sun Diameter: 1895.8 arc-seconds

Moon Right Ascension: 21.77

Moon Declination: -14.3

Moon Diameter: 2007.8 arc-seconds

The total duration of the eclipse was 4 hours, 31 minutes.

The duration of the partial eclipse was 2 hours, 11 minutes.

Visibility

Relation to other lunar eclipses

Lunar year series

Lunar eclipse series sets from 1969–1973
Ascending node				Descending node
Saros	Date Viewing	Type Chart	Gamma	Saros	Date Viewing	Type Chart	Gamma
108	1969 Aug 27	Penumbral	−1.54066	113	1970 Feb 21	Partial	0.96198
118	1970 Aug 17	Partial	−0.80534	123	1971 Feb 10	Total	0.27413
128	1971 Aug 06	Total	−0.07944	133	1972 Jan 30	Total	−0.42729
138	1972 Jul 26	Partial	0.71167	143	1973 Jan 18	Penumbral	−1.08446
148	1973 Jul 15	Penumbral	1.51782

Last set	1969 Sep 25			Last set	1969 Apr 02

Next set	1973 Jun 15			Next set	1973 Dec 10

Metonic cycle

This is the third of five Metonic lunar eclipses.

The Metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the Earth's shadow will in nearly the same location relative to the background stars.

Metonic lunar eclipse sets 1951–2027
Descending node			Ascending node
Saros	Date	Type	Saros	Date	Type
103	1951 Feb 21.88	Penumbral	108	1951 Aug 17.13	Penumbral

113	1970 Feb 21.35	Partial	118	1970 Aug 17.14	Partial

123	1989 Feb 20.64	Total	128	1989 Aug 17.13	Total

133	2008 Feb 21.14	Total	138	2008 Aug 16.88	Partial

143	2027 Feb 20.96	Penumbral	148	2027 Aug 17.30	Penumbral

Half-Saros cycle

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 annular solar eclipses of Solar Saros 125.