Solar_eclipse_of_August_10,_1980 Knowpia

Solar eclipse of August 10, 1980
Solar eclipse of August 10, 1980
	Map
Type of eclipse
Nature	Annular
Gamma	−0.1915
Magnitude	0.9727
Maximum eclipse
Duration	203 s (3 min 23 s)
Coordinates	4°36′N 108°54′W / 4.6°N 108.9°W
Max. width of band	100 km (62 mi)
Times (UTC)
Greatest eclipse	19:12:21
References
Saros	135 (37 of 71)
Catalog # (SE5000)	9465

An annular solar eclipse occurred at the Moon's ascending node of the orbit on August 10, 1980, centred over the Pacific Ocean. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. An annular solar eclipse occurs when the Moon's apparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Annularity was visible in Tabuaeran of Kiribati, Peru, Bolivia, northern Paraguay and Brazil. Occurring 5 days before apogee (Apogee on Friday, August 15, 1980), the Moon's apparent diameter was smaller. At greatest eclipse, the Sun was 79 degrees (4,470 arc-minutes, or 284,400 arc-seconds) above horizon.

Related eclipses edit

Eclipses in 1980 edit

A total solar eclipse on Saturday, 16 February 1980.
A penumbral lunar eclipse on Saturday, 1 March 1980.
A penumbral lunar eclipse on Sunday, 27 July 1980.
An annular solar eclipse on Sunday, 10 August 1980.
A penumbral lunar eclipse on Tuesday, 26 August 1980.

Solar eclipses of 1979–1982 edit

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] There were 8 solar eclipses between February 26, 1979 and July 20, 1982. Were there: February 26, 1979 (total solar eclipse, 0.8 days after perigee, 103.9%, 0.89811 gamma, saros 120), August 22, 1979 (small annular solar eclipse, 0.6 days before apogee, 93.3%, −0.96319 gamma, saros 125), February 16, 1980 (total solar eclipse, 1 day before perigee, 104.3%, 0.22244 gamma, saros 130), August 10, 1980 (large annular solar eclipse, 5 days before apogee, 97.3%, −0.19154 gamma, saros 135), February 4, 1981 (large annular solar eclipse, 4 days before perigee, 99.4%, −0.48375 gamma, saros 140), July 31, 1981 (total solar eclipse, 3.8 days after perigee, 102.6%, 0.57917 gamma, saros 145), January 25, 1982 (moderate partial solar eclipse, 4.7 days after apogee, 56.6%, −1.23110 gamma, saros 150) and July 20, 1982 (small partial solar eclipse, 0.9 days after perigee, 46.4%, 1.28859 gamma, saros 155).

Solar eclipse series sets from 1979 to 1982
Descending node			Ascending node
Saros	Map	Gamma	Saros	Map	Gamma
120	1979 February 26 Total	0.89811	125	1979 August 22 Annular	−0.96319
130	1980 February 16 Total	0.22244	135	1980 August 10Annular −0.19154 140 1981 February 4 Annular	−0.48375	145	1981 July 31 Total	0.57917
150	1982 January 25 Partial	−1.23110	155	1982 July 20 Partial	1.28859
Partial solar eclipses on June 21, 1982 and December 15, 1982 occur in the next lunar year eclipse set.

Saros 135 edit

It is a part of Saros cycle 135, repeating every 18 years, 11 days, containing 71 events. The series started with partial solar eclipse on July 5, 1331. It contains annular eclipses from October 21, 1511, through February 24, 2305, hybrid eclipses on March 8, 2323, and March 18, 2341, and total eclipses from March 29, 2359, through May 22, 2449. The series ends at member 71 as a partial eclipse on August 17, 2593. The longest duration of totality will be 2 minutes, 27 seconds on May 12, 2431.

Series members 27–43 occur between 1800 and 2100:
27	28	29
Apr 24, 1800	May 5, 1818	May 15, 1836
30	31	32
May 26, 1854	Jun 6, 1872	Jun 17, 1890
33	34	35
Jun 28, 1908	Jul 9, 1926	Jul 20, 1944
36	37	38
Jul 31, 1962	Aug 10, 1980	Aug 22, 1998
39	40	41
Sep 1, 2016	Sep 12, 2034	Sep 22, 2052
42	43
Oct 4, 2070	Oct 14, 2088

Tritos series edit

This eclipse is a part of a tritos cycle, repeating at alternating nodes every 135 synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee), but groupings of 3 tritos cycles (≈ 33 years minus 3 months) come close (≈ 434.044 anomalistic months), so eclipses are similar in these groupings.

Series members between 1801 and 2100
December 21, 1805 (Saros 119)	November 19, 1816 (Saros 120)	October 20, 1827 (Saros 121)
September 18, 1838 (Saros 122)	August 18, 1849 (Saros 123)	July 18, 1860 (Saros 124)
June 18, 1871 (Saros 125)	May 17, 1882 (Saros 126)	April 16, 1893 (Saros 127)
March 17, 1904 (Saros 128)	February 14, 1915 (Saros 129)	January 14, 1926 (Saros 130)
December 13, 1936 (Saros 131)	November 12, 1947 (Saros 132)	October 12, 1958 (Saros 133)
September 11, 1969 (Saros 134)	August 10, 1980(Saros 135) July 11, 1991 (Saros 136)
June 10, 2002 (Saros 137)	May 10, 2013 (Saros 138)	April 8, 2024 (Saros 139)
March 9, 2035 (Saros 140)	February 5, 2046 (Saros 141)	January 5, 2057 (Saros 142)
December 6, 2067 (Saros 143)	November 4, 2078 (Saros 144)	October 4, 2089 (Saros 145)
September 4, 2100 (Saros 146)

In the 22nd century:

Solar saros 147: annular solar eclipse of August 4, 2111
Solar saros 148: total solar eclipse of July 4, 2122
Solar saros 149: total solar eclipse of June 3, 2133
Solar saros 150: annular solar eclipse of May 3, 2144
Solar saros 151: annular solar eclipse of April 2, 2155
Solar saros 152: total solar eclipse of March 2, 2166
Solar saros 153: annular solar eclipse of January 29, 2177
Solar saros 154: annular solar eclipse of December 29, 2187
Solar saros 155: total solar eclipse of November 28, 2198

In the 23rd century:

Solar saros 156: annular solar eclipse of October 29, 2209
Solar saros 157: annular solar eclipse of September 27, 2220
Solar saros 158: total solar eclipse of August 28, 2231
Solar saros 159: partial solar eclipse of July 28, 2242
Solar saros 160: partial solar eclipse of June 26, 2253
Solar saros 161: partial solar eclipse of May 26, 2264
Solar saros 162: partial solar eclipse of April 26, 2275
Solar saros 163: partial solar eclipse of March 25, 2286
Solar saros 164: partial solar eclipse of February 22, 2297

Metonic series edit

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). All eclipses in this table occur at the Moon's ascending node.

22 eclipse events between January 5, 1935 and August 11, 2018
January 4-5	October 23-24	August 10-12	May 30-31	March 18-19
111	113	115	117	119
January 5, 1935		August 12, 1942	May 30, 1946	March 18, 1950
121	123	125	127	129
January 5, 1954	October 23, 1957	August 11, 1961	May 30, 1965	March 18, 1969
131	133	135	137	139
January 4, 1973	October 23, 1976	August 10, 1980 May 30, 1984	March 18, 1988
141	143	145	147	149
January 4, 1992	October 24, 1995	August 11, 1999	May 31, 2003	March 19, 2007
151	153	155
January 4, 2011	October 23, 2014	August 11, 2018

Notes edit

^ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.