Solar eclipse of March 18, 1969

Last updated
Solar eclipse of March 18, 1969
SE1969Mar18A.png
Map
Type of eclipse
NatureAnnular
Gamma -0.2704
Magnitude 0.9954
Maximum eclipse
Duration26 sec (0 m 26 s)
Coordinates 14°48′S116°18′E / 14.8°S 116.3°E / -14.8; 116.3
Max. width of band16 km (9.9 mi)
Times (UTC)
Greatest eclipse4:54:57
References
Saros 129 (49 of 80)
Catalog # (SE5000) 9440

An annular solar eclipse occurred on March 18, 1969. 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 from part of Indonesia, and two atolls (Faraulep and Gaferut) in the Trust Territory of the Pacific Islands which belongs to the Federated States of Micronesia now.

Contents

Solar eclipses of 1968–1971

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
SarosMapGammaSarosMapGamma
119 SE1968Mar28P.png
1968 March 28
Partial
-1.03704124 SE1968Sep22T.png
1968 September 22
Total
0.94507
129 SE1969Mar18A.png
1969 March 18
Annular
-0.27037134 SE1969Sep11A.png
1969 September 11
Annular
0.22014
139 SE1970Mar07T.png
1970 March 7
Total
0.44728144 SE1970Aug31A.png
1970 August 31
Annular
-0.53640
149 SE1971Feb25P.png
1971 February 25
Partial
1.11876154 SE1971Aug20P.png
1971 August 20
Partial
-1.26591
A partial solar eclipse of July 22, 1971 occurs in the next lunar year set.

Saros 129

It is a part of Saros cycle 129, repeating every 18 years, 11 days, containing 80 events. The series started with partial solar eclipse on October 3, 1103. It contains annular eclipses on May 6, 1464 through March 18, 1969, hybrid eclipses from March 29, 1987 through April 20, 2023 and total eclipses from April 30, 2041 through July 26, 2185. The series ends at member 80 as a partial eclipse on February 21, 2528. The longest duration of totality was 3 minutes, 43 seconds on June 25, 2131 . All eclipses in this series occurs at the Moon’s ascending node. [2]

Series members 46–56 occur between 1901 and 2100:
464748
SE1915Feb14A.png
February 14, 1915
SE1933Feb24A.png
February 24, 1933
SE1951Mar07A.png
March 7, 1951
495051
SE1969Mar18A.png
March 18, 1969
SE1987Mar29H.png
March 29, 1987
SE2005Apr08H.png
April 8, 2005
525354
SE2023Apr20H.png
April 20, 2023
SE2041Apr30T.png
April 30, 2041
SE2059May11T.png
May 11, 2059
5556
SE2077May22T.png
May 22, 2077
SE2095Jun02T.png
June 2, 2095

Tritos series

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.

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 ascending node.

22 eclipse events between January 5, 1935 and August 11, 2018
January 4-5October 23-24August 10-12May 30-31March 18-19
111113115117119
SE1935Jan05P.png
January 5, 1935
SE1942Aug12P.png
August 12, 1942
SE1946May30P.png
May 30, 1946
SE1950Mar18A.png
March 18, 1950
121123125127129
SE1954Jan05A.png
January 5, 1954
SE1957Oct23T.png
October 23, 1957
SE1961Aug11A.png
August 11, 1961
SE1965May30T.png
May 30, 1965
SE1969Mar18A.png
March 18, 1969
131133135137139
SE1973Jan04A.png
January 4, 1973
SE1976Oct23T.png
October 23, 1976
SE1980Aug10A.png
August 10, 1980
SE1984May30A.png
May 30, 1984
SE1988Mar18T.png
March 18, 1988
141143145147149
SE1992Jan04A.png
January 4, 1992
SE1995Oct24T.png
October 24, 1995
SE1999Aug11T.png
August 11, 1999
SE2003May31A.png
May 31, 2003
SE2007Mar19P.png
March 19, 2007
151153155157159
SE2011Jan04P.png
January 4, 2011
SE2014Oct23P.png
October 23, 2014
SE2018Aug11P.png
August 11, 2018

Notes

  1. 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.
  2. Espenak, F. "NASA Catalog of Solar Eclipses of Saros 129". eclipse.gsfc.nasa.gov.

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References