Solar eclipse of February 25, 1971

This eclipse is a member of a semester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[1]

Solar eclipse series sets from 1968–1971
Ascending node			Descending node
Saros	Map		Saros	Map
119	1968 March 28 Partial		124	1968 September 22 Total
129	1969 March 18 Annular		134	1969 September 11 Annular
139	1970 March 7 Total		144	1970 August 31 Annular
149	1971 February 25 Partial		154	1971 August 20 Partial
A partial solar eclipse of July 22, 1971 occurs in the next lunar year set.

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).

21 eclipse events between July 21, 1906 and July 20, 1982
July 20–21	May 9	February 24–25	December 13–14	October 1–2
105	107	109	111	113
			December 13, 1898
115	117	119	121	123
July 21, 1906	May 9, 1910	February 25, 1914	December 14, 1917	October 1, 1921
125	127	129	131	133
July 20, 1925	May 9, 1929	February 24, 1933	December 13, 1936	October 1, 1940
135	137	139	141	143
July 20, 1944	May 9, 1948	February 25, 1952	December 14, 1955	October 2, 1959
145	147	149	151	153
July 20, 1963	May 9, 1967	February 25, 1971	December 13, 1974	October 2, 1978
155
July 20, 1982