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Solar eclipse of March 28, 1968

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Solar eclipse of March 28, 1968
Map
Type of eclipse
NaturePartial
Gamma−1.037
Magnitude0.899
Maximum eclipse
Coordinates61°00′S 79°48′W / 61°S 79.8°W / -61; -79.8
Times (UTC)
Greatest eclipse23:00:30
References
Saros119 (63 of 71)
Catalog # (SE5000)9438

A partial solar eclipse occurred at the Moon's ascending node of orbit between Thursday, March 28 and Friday, March 29, 1968,[1] with a magnitude of 0.899. 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 eastern Oceania and Antarctica.

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.[2]

March 28, 1968 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1968 March 28 at 20:44:13.8 UTC
Equatorial Conjunction 1968 March 28 at 21:53:55.7 UTC
Ecliptic Conjunction 1968 March 28 at 22:48:36.8 UTC
Greatest Eclipse 1968 March 28 at 23:00:30.4 UTC
Last Penumbral External Contact 1968 March 29 at 01:17:17.4 UTC
March 28, 1968 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.89902
Eclipse Obscuration 0.84205
Gamma −1.03704
Sun Right Ascension 00h30m35.2s
Sun Declination +03°18'09.3"
Sun Semi-Diameter 16'01.0"
Sun Equatorial Horizontal Parallax 08.8"
Moon Right Ascension 00h32m24.8s
Moon Declination +02°28'24.8"
Moon Semi-Diameter 14'57.5"
Moon Equatorial Horizontal Parallax 0°54'53.9"
ΔT 38.5 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.

Eclipse season of March–April 1968
March 28
Ascending node (new moon)
April 13
Descending node (full moon)
Partial solar eclipse
Solar Saros 119
Total lunar eclipse
Lunar Saros 131
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Eclipses in 1968

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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 119

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Inex

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Triad

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Solar eclipses of 1968–1971

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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.[3]

The partial solar eclipse on July 22, 1971 occurs in the next lunar year eclipse set.

Solar eclipse series sets from 1968 to 1971
Ascending node   Descending node
Saros Map Gamma Saros Map Gamma
119 March 28, 1968

Partial
−1.037 124 September 22, 1968

Total
0.9451
129 March 18, 1969

Annular
−0.2704 134 September 11, 1969

Annular
0.2201
139

Totality in Williamston, NC
USA
March 7, 1970

Total
0.4473 144 August 31, 1970

Annular
−0.5364
149 February 25, 1971

Partial
1.1188 154 August 20, 1971

Partial
−1.2659

Saros 119

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This eclipse is a part of Saros series 119, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on May 15, 850 AD. It contains total eclipses on August 9, 994 AD and August 20, 1012; a hybrid eclipse on August 31, 1030; and annular eclipses from September 10, 1048 through March 18, 1950. The series ends at member 71 as a partial eclipse on June 24, 2112. 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 totality was produced by member 10 at 32 seconds on August 20, 1012, and the longest duration of annularity was produced by member 44 at 7 minutes, 37 seconds on September 1, 1625. All eclipses in this series occur at the Moon’s ascending node of orbit.[4]

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.

20 eclipse events between June 10, 1964 and August 21, 2036
June 10–11 March 28–29 January 14–16 November 3 August 21–22
117 119 121 123 125

June 10, 1964

March 28, 1968

January 16, 1972

November 3, 1975

August 22, 1979
127 129 131 133 135

June 11, 1983

March 29, 1987

January 15, 1991

November 3, 1994

August 22, 1998
137 139 141 143 145

June 10, 2002

March 29, 2006

January 15, 2010

November 3, 2013

August 21, 2017
147 149 151 153 155

June 10, 2021

March 29, 2025

January 14, 2029

November 3, 2032

August 21, 2036

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 1837 and 2200

April 5, 1837
(Saros 107)

March 5, 1848
(Saros 108)

February 3, 1859
(Saros 109)

December 2, 1880
(Saros 111)

August 31, 1913
(Saros 114)

July 31, 1924
(Saros 115)

June 30, 1935
(Saros 116)

May 30, 1946
(Saros 117)

April 30, 1957
(Saros 118)

March 28, 1968
(Saros 119)

February 26, 1979
(Saros 120)

January 26, 1990
(Saros 121)

December 25, 2000
(Saros 122)

November 25, 2011
(Saros 123)

October 25, 2022
(Saros 124)

September 23, 2033
(Saros 125)

August 23, 2044
(Saros 126)

July 24, 2055
(Saros 127)

June 22, 2066
(Saros 128)

May 22, 2077
(Saros 129)

April 21, 2088
(Saros 130)

March 21, 2099
(Saros 131)

February 18, 2110
(Saros 132)

January 19, 2121
(Saros 133)

December 19, 2131
(Saros 134)

November 17, 2142
(Saros 135)

October 17, 2153
(Saros 136)

September 16, 2164
(Saros 137)

August 16, 2175
(Saros 138)

July 16, 2186
(Saros 139)

June 15, 2197
(Saros 140)

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

July 8, 1823
(Saros 114)

June 17, 1852
(Saros 115)

May 27, 1881
(Saros 116)

May 9, 1910
(Saros 117)

April 19, 1939
(Saros 118)

March 28, 1968
(Saros 119)

March 9, 1997
(Saros 120)

February 17, 2026
(Saros 121)

January 27, 2055
(Saros 122)

January 7, 2084
(Saros 123)

December 19, 2112
(Saros 124)

November 28, 2141
(Saros 125)

November 8, 2170
(Saros 126)

October 19, 2199
(Saros 127)

References

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  1. ^ "March 28–29, 1968 Partial Solar Eclipse". timeanddate. Retrieved 8 August 2024.
  2. ^ "Partial Solar Eclipse of 1968 Mar 28". EclipseWise.com. Retrieved 8 August 2024.
  3. ^ 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.
  4. ^ "NASA - Catalog of Solar Eclipses of Saros 119". eclipse.gsfc.nasa.gov.
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