Solar eclipse of April 7, 1978

There were 8 solar eclipses (at 6 month intervals) between May 11, 1975 and October 2, 1978.

Solar eclipse series sets from 1975–1978
Descending node				Ascending node
Saros	Map	Gamma		Saros	Map	Gamma
118	1975 May 11 Partial	1.06472		123	1975 November 3 Partial	-1.02475
128	1976 April 29 Annular	0.33783		133	1976 October 23 Total	-0.32699
138	1977 April 18 Annular	-0.39903		143	1977 October 12 Total	0.38363
148	1978 April 7 Partial	-1.10812		153	1978 October 2 Partial	1.16164

The metonic series repeats eclipses every 19 years (6939.69 days), lasting about 5 cycles. Eclipses occur in nearly the same calendar date. In addition, the octon subseries repeats 1/5 of that or every 3.8 years (1387.94 days).

22 eclipse events, progressing from north to south between April 8, 1902 and August 31, 1989:
April 7–8	January 24–25	November 12	August 31-September 1	June 19–20
108			114	116
April 8, 1902			August 31, 1913	June 19, 1917
118	120	122	124	126
April 8, 1921	January 24, 1925	November 12, 1928	August 31, 1932	June 19, 1936
128	130	132	134	136
April 7, 1940	January 25, 1944	November 12, 1947	September 1, 1951	June 20, 1955
138	140	142	144	146
April 8, 1959	January 25, 1963	November 12, 1966	August 31, 1970	June 20, 1974
148	150	152	154
April 7, 1978	January 25, 1982	November 12, 1985	August 31, 1989