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Solar eclipse of August 10, 1980

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Solar eclipse of August 10, 1980
Map
Type of eclipse
NatureAnnular
Gamma−0.1915
Magnitude0.9727
Maximum eclipse
Duration203 s (3 min 23 s)
Coordinates4°36′N 108°54′W / 4.6°N 108.9°W / 4.6; -108.9
Max. width of band100 km (62 mi)
Times (UTC)
Greatest eclipse19:12:21
References
Saros135 (37 of 71)
Catalog # (SE5000)9465

An annular solar eclipse occurred at the Moon's ascending node of orbit on Sunday, August 10, 1980,[1] with a magnitude of 0.9727. 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. Occurring about 5 days before apogee (on August 15, 1980, at 19:00 UTC), the Moon's apparent diameter was smaller.[2]

Annularity was visible in Tabuaeran of Kiribati, Peru, Bolivia, northern Paraguay and Brazil. A partial eclipse was visible for parts of eastern Oceania, Hawaii, the southern United States, Mexico, Central America, the Caribbean, and South America.

Eclipse details

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Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse.[3]

August 10, 1980 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1980 August 10 at 16:14:41.9 UTC
First Umbral External Contact 1980 August 10 at 17:18:11.1 UTC
First Central Line 1980 August 10 at 17:19:35.0 UTC
First Umbral Internal Contact 1980 August 10 at 17:20:59.0 UTC
First Penumbral Internal Contact 1980 August 10 at 18:26:38.7 UTC
Greatest Duration 1980 August 10 at 19:04:16.8 UTC
Ecliptic Conjunction 1980 August 10 at 19:10:08.9 UTC
Greatest Eclipse 1980 August 10 at 19:12:21.1 UTC
Equatorial Conjunction 1980 August 10 at 19:17:07.0 UTC
Last Penumbral Internal Contact 1980 August 10 at 19:57:54.5 UTC
Last Umbral Internal Contact 1980 August 10 at 21:03:37.7 UTC
Last Central Line 1980 August 10 at 21:05:04.4 UTC
Last Umbral External Contact 1980 August 10 at 21:06:31.0 UTC
Last Penumbral External Contact 1980 August 10 at 22:10:03.9 UTC
August 10, 1980 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.97267
Eclipse Obscuration 0.94609
Gamma −0.19154
Sun Right Ascension 09h22m51.8s
Sun Declination +15°21'02.2"
Sun Semi-Diameter 15'46.9"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 09h22m42.5s
Moon Declination +15°10'40.6"
Moon Semi-Diameter 15'07.1"
Moon Equatorial Horizontal Parallax 0°55'29.1"
ΔT 51.0 s

Eclipse season

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This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur. Only two (or occasionally three) eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months (173 days) later; thus two full eclipse seasons always occur each year. Either two or three eclipses happen each eclipse season. In the sequence below, each eclipse is separated by a fortnight. The first and last eclipse in this sequence is separated by one synodic month.

Eclipse season of July–August 1980
July 27
Descending node (full moon)
August 10
Ascending node (new moon)
August 26
Descending node (full moon)
Penumbral lunar eclipse
Lunar Saros 109
Annular solar eclipse
Solar Saros 135
Penumbral lunar eclipse
Lunar Saros 147
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Eclipses in 1980

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Metonic

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Tzolkinex

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Half-Saros

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Tritos

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Solar Saros 135

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Inex

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Triad

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Solar eclipses of 1979–1982

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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.[4]

The partial solar eclipses on June 21, 1982 and December 15, 1982 occur in the next lunar year eclipse set.

Solar eclipse series sets from 1979 to 1982
Descending node   Ascending node
Saros Map Gamma Saros Map Gamma
120

Totality in Brandon, MB,
Canada
February 26, 1979

Total
0.8981 125 August 22, 1979

Annular
−0.9632
130 February 16, 1980

Total
0.2224 135 August 10, 1980

Annular
−0.1915
140 February 4, 1981

Annular
−0.4838 145 July 31, 1981

Total
0.5792
150 January 25, 1982

Partial
−1.2311 155 July 20, 1982

Partial
1.2886

Saros 135

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This eclipse is a part of Saros series 135, repeating every 18 years, 11 days, and containing 71 events. The series started with a 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. Its eclipses are tabulated in three columns; every third eclipse in the same column is one exeligmos apart, so they all cast shadows over approximately the same parts of the Earth.

The longest duration of annularity was produced by member 16 at 10 minutes, 41 seconds on December 24, 1601, and the longest duration of totality will be produced by member 62 at 2 minutes, 27 seconds on May 12, 2431. All eclipses in this series occur at the Moon’s ascending node of orbit.[5]

Series members 28–49 occur between 1801 and 2200:
28 29 30

May 5, 1818

May 15, 1836

May 26, 1854
31 32 33

June 6, 1872

June 17, 1890

June 28, 1908
34 35 36

July 9, 1926

July 20, 1944

July 31, 1962
37 38 39

August 10, 1980

August 22, 1998

September 1, 2016
40 42 42

September 12, 2034

September 22, 2052

October 4, 2070
43 44 45

October 14, 2088

October 26, 2106

November 6, 2124
46 47 48

November 17, 2142

November 27, 2160

December 9, 2178
49

December 19, 2196

Metonic series

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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

Tritos series

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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 2200

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)

August 4, 2111
(Saros 147)

July 4, 2122
(Saros 148)

June 3, 2133
(Saros 149)

May 3, 2144
(Saros 150)

April 2, 2155
(Saros 151)

March 2, 2166
(Saros 152)

January 29, 2177
(Saros 153)

December 29, 2187
(Saros 154)

November 28, 2198
(Saros 155)

Inex series

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This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.

Series members between 1801 and 2200

December 10, 1806
(Saros 129)

November 20, 1835
(Saros 130)

October 30, 1864
(Saros 131)

October 9, 1893
(Saros 132)

September 21, 1922
(Saros 133)

September 1, 1951
(Saros 134)

August 10, 1980
(Saros 135)

July 22, 2009
(Saros 136)

July 2, 2038
(Saros 137)

June 11, 2067
(Saros 138)

May 22, 2096
(Saros 139)

May 3, 2125
(Saros 140)

April 12, 2154
(Saros 141)

March 23, 2183
(Saros 142)

Notes

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  1. ^ "August 10, 1980 Annular Solar Eclipse". timeanddate. Retrieved 8 August 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 8 August 2024.
  3. ^ "Annular Solar Eclipse of 1980 Aug 10". EclipseWise.com. Retrieved 8 August 2024.
  4. ^ 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.
  5. ^ "NASA - Catalog of Solar Eclipses of Saros 135". eclipse.gsfc.nasa.gov.

References

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