Solar eclipse of July 22, 1971

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A partial solar eclipse occurred at the Moon's descending node of orbit on Thursday, July 22, 1971,[1] with a magnitude of 0.0689. 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. A partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth.

A partial eclipse was visible for parts of the eastern Soviet Union and northern Alaska. This was the 70th and final solar eclipse from Solar Saros 116.

Eclipse details

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.[2]

July 22, 1971 Solar Eclipse Times
Event Time (UTC)
Equatorial Conjunction 1971 July 22 at 08:38:38.2 UTC
First Penumbral External Contact 1971 July 22 at 08:52:56.7 UTC
Ecliptic Conjunction 1971 July 22 at 09:15:39.4 UTC
Greatest Eclipse 1971 July 22 at 09:31:55.3 UTC
Last Penumbral External Contact 1971 July 22 at 10:11:20.6 UTC
July 22, 1971 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.06899
Eclipse Obscuration 0.02136
Gamma 1.51298
Sun Right Ascension 08h04m17.6s
Sun Declination +20°22'36.4"
Sun Semi-Diameter 15'44.4"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 08h06m05.8s
Moon Declination +21°43'24.7"
Moon Semi-Diameter 15'17.0"
Moon Equatorial Horizontal Parallax 0°56'05.5"
ΔT 41.8 s

Eclipse season

Script error: No such module "Labelled list hatnote". 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 1971
July 22
Descending node (new moon)
 August 6
Ascending node (full moon)
 August 20
Descending node (new moon)
File:SE1971Jul22P.png File:Lunar eclipse chart close-1971Aug06.png File:SE1971Aug20P.png
Partial solar eclipse
Solar Saros 116		 Total lunar eclipse
Lunar Saros 128		 Partial solar eclipse
Solar Saros 154

Related eclipses

Eclipses in 1971

Metonic

Tzolkinex

Half-Saros

Tritos

Solar Saros 116

Inex

Triad

Solar eclipses of 1971–1974

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.[3]

The partial solar eclipses on February 25, 1971 and August 20, 1971 occur in the previous lunar year eclipse set.

Solar eclipse series sets from 1971 to 1974
Descending node   Ascending node
Saros Map Gamma Saros Map Gamma
116 July 22, 1971
File:SE1971Jul22P.png
Partial 		1.513 121 January 16, 1972
File:SE1972Jan16A.png
Annular 		−0.9365
126 July 10, 1972
File:SE1972Jul10T.png
Total 		0.6872 131 January 4, 1973
File:SE1973Jan04A.png
Annular 		−0.2644
136 June 30, 1973
File:SE1973Jun30T.png
Total 		−0.0785 141 December 24, 1973
File:SE1973Dec24A.png
Annular 		0.4171
146 June 20, 1974
File:SE1974Jun20T.png
Total 		−0.8239 151 December 13, 1974
File:SE1974Dec13P.png
Partial 		1.0797

Saros 116

Template:Solar Saros series 116

Metonic series

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 descending node.

21 eclipse events between July 22, 1971 and July 22, 2047
July 22 May 9–11 February 26–27 December 14–15 October 2–3
116 118 120 122 124
File:SE1971Jul22P.png
July 22, 1971 		File:SE1975May11P.png
May 11, 1975 		File:SE1979Feb26T.png
February 26, 1979 		File:SE1982Dec15P.png
December 15, 1982 		File:SE1986Oct03H.png
October 3, 1986
126 128 130 132 134
File:SE1990Jul22T.png
July 22, 1990 		File:SE1994May10A.png
May 10, 1994 		File:SE1998Feb26T.png
February 26, 1998 		File:SE2001Dec14A.png
December 14, 2001 		File:SE2005Oct03A.png
October 3, 2005
136 138 140 142 144
File:SE2009Jul22T.png
July 22, 2009 		File:SE2013May10A.png
May 10, 2013 		File:SE2017Feb26A.png
February 26, 2017 		File:SE2020Dec14T.png
December 14, 2020 		File:SE2024Oct02A.png
October 2, 2024
146 148 150 152 154
File:SE2028Jul22T.png
July 22, 2028 		File:SE2032May09A.png
May 9, 2032 		File:SE2036Feb27P.png
February 27, 2036 		File:SE2039Dec15T.png
December 15, 2039 		File:SE2043Oct03A.png
October 3, 2043
156
File:SE2047Jul22P.png
July 22, 2047

Tritos series

Template:Solar Tritos series 2004 April 19

Inex series

Template:Solar Inex series 2000 July 1

References

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  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ Script error: No such module "citation/CS1".
  3. ↑ Script error: No such module "citation/CS1".

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External links

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