A penumbral lunar eclipse took place on Friday, June 15, 1973, the second of four lunar eclipses in 1973, the first was a penumbral lunar eclipse on Thursday, January 18, the third being with a penumbral lunar eclipse on Sunday, July 15, and the last being with a partial lunar eclipse on Monday, December 10.^[1]

• An annular solar eclipse on Thursday, 4 January 1973.
• A penumbral lunar eclipse on Thursday, 18 January 1973.
• A penumbral lunar eclipse on Friday, 15 June 1973.
• A total solar eclipse on Saturday, 30 June 1973.
• A penumbral lunar eclipse on Sunday, 15 July 1973.
• A partial lunar eclipse on Monday, 10 December 1973.
• An annular solar eclipse on Monday, 24 December 1973.

Lunar eclipse series sets from 1973–1976
Ascending node					Descending node
Saros	Date Viewing	Type Chart	Gamma		Saros	Date Viewing	Type Chart	Gamma
110	1973 Jun 15	Penumbral	−1.32166		115	1973 Dec 10	Partial	0.96441
120	1974 Jun 04	Partial	−0.54887		125	1974 Nov 29	Total	0.30540
130	1975 May 25	Total	0.23674		135	1975 Nov 18	Total	−0.41343
140	1976 May 13	Partial	0.95860		145	1976 Nov 06	Penumbral	−1.12760
Last set	1973 Jul 15				Last set	1973 Jan 18
Next set	1977 Apr 04				Next set	1977 Sep 27

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 117.

June 10, 1964	June 21, 1982

• List of lunar eclipses
• List of 20th-century lunar eclipses

• 1973 Jun 15 chart Eclipse Predictions by Fred Espenak, NASA/GSFC

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