Solar eclipse of June 30, 1973

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Solar eclipse of June 30, 1973
SE1973Jun30T.png
Map
Type of eclipse
Nature Total
Gamma -0.0785
Magnitude 1.0792
Maximum eclipse
Duration 7m 4s
Coordinates 18.8N 5.6E
Max. width of band 256 km
Times (UTC)
Greatest eclipse 11:38:41
References
Saros 136 (35 of 71)
Catalog # (SE5000) 9450

A total solar eclipse occurred on June 30, 1973. 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 total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across the surface of the Earth, while a partial solar eclipse will be visible over a region thousands of kilometres wide.

Observations[edit]

This eclipse was observed by a group of scientists from the Los Alamos National Laboratory using two airplanes to extend the apparent time of totality by flying along the eclipse path in the same direction as the Moon's shadow as it passed over Africa. One of the planes was a prototype of what later became the Concorde, which has a top speed of almost 1,300 miles per hour (2,100 km/h). This enabled the scientists to experience a period of totality that lasted more than 74 minutes, nearly 10 times longer than is possible when viewing a total solar eclipse from a stationary location.[1]

The eclipse was also observed by a charter flight from Mount San Antonio College in Southern California. The DC-8 with 150 passengers intercepted the eclipse at 35,000 feet just off the east coast of Africa and tracked the eclipse for three minutes. The passengers rotated seats every 20 seconds so that each passenger had three 20 second opportunities at the window to observe and take pictures.

Related eclipses[edit]

Solar eclipses of 1971-1974[edit]

Each member 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.

Note: Partial solar eclipses on February 25, 1971 and August 20, 1971 occur in the next lunar year set.

Solar eclipse series sets from 1971-1974
Ascending node   Descending node
Saros Map Saros Map
116 SE1971Jul22P.png
July 22, 1971
Partial
121 SE1972Jan16A.png
January 16, 1972
Annular
126 SE1972Jul10T.png
July 10, 1972
Total
131 SE1973Jan04A.png
January 4, 1973
Annular
136 SE1973Jun30T.png
June 30, 1973
Total
141 SE1973Dec24A.png
December 24, 1973
Annular
146 SE1974Jun20T.png
June 20, 1974
Total
151 SE1974Dec13P.png
December 13, 1974
Partial

Saros 136[edit]

Solar Saros 136, repeating every 18 years, 11 days, contains 71 events. The series started with partial solar eclipse on Jun 14, 1360, and reached a first annular eclipse on September 8, 1504. It was a hybrid event from November 22, 1612, through January 17, 1703, and total eclipses from January 27, 1721 through May 13, 2496. The series ends at member 71 as a partial eclipse on July 30, 2622, with the entire series lasting 1262 years. The longest eclipse occurred on June 20, 1955, with a maximum duration of totality at 7 minutes, 8 seconds.[2]

Series members 29–42 occur between 1865 and 2100:

28 29 30
SE1865Apr25T.gif
April 25, 1865
SE1883May06T.png
May 6, 1883
31 32 33
SE1901May18T.png
May 18, 1901
SE1919May29T.png
May 29, 1919
SE1937Jun08T.png
Jun 8, 1937
34 35 36
SE1955Jun20T.png
Jun 20, 1955
SE1973Jun30T.png
Jun 30, 1973
SE1991Jul11T.png
Jul 11, 1991
37 38 39
SE2009Jul22T.png
Jul 22, 2009
SE2027Aug02T.png
Aug 2, 2027
SE2045Aug12T.png
Aug 12, 2045
40 41 42
SE2063Aug24T.png
Aug. 24, 2063
SE2081Sep03T.png
Sep. 3, 2081
SE2099Sep14T.png
Sep. 14, 2099

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).

This series has 22 eclipse events between September 12, 1931 and July 1, 2011.

September 11-12 June 30-July 1 April 18-19 February 4-5 November 22-23
114 116 118 120 122
SE1931Sep12P.png
September 12, 1931
SE1935Jun30P.png
June 30, 1935
SE1939Apr19A.png
April 19, 1939
SE1943Feb04T.png
February 4, 1943
SE1946Nov23P.png
November 23, 1946
124 126 128 130 132
SE1950Sep12T.png
September 12, 1950
SE1954Jun30T.png
June 30, 1954
SE1958Apr19A.png
April 19, 1958
SE1962Feb05T.png
February 5, 1962
SE1965Nov23A.png
November 23, 1965
134 136 138 140 142
SE1969Sep11A.png
September 11, 1969
SE1973Jun30T.png
June 30, 1973
SE1977Apr18A.png
April 18, 1977
SE1981Feb04A.png
February 4, 1981
SE1984Nov22T.png
November 22, 1984
144 146 148 150 152
SE1988Sep11A.png
September 11, 1988
SE1992Jun30T.png
June 30, 1992
SE1996Apr17P.png
April 17, 1996
SE2000Feb05P.png
February 5, 2000
SE2003Nov23T.png
November 23, 2003
154 156
SE2007Sep11P.png
September 11, 2007
SE2011Jul01P.png
July 1, 2011

Notes[edit]

  1. ^ Mulkin, Barb (1981). "In Flight: The Story of Los Alamos Eclipse Missions, p.42". Los Alamos National Laboratory. Retrieved 2010-07-14. 
  2. ^ SEsaros136 at NASA.gov

References[edit]