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Solar eclipse of March 7, 1970

 

Solar eclipse of March 7, 1970

Solar eclipse of March 7, 1970
Map
Type of eclipse
Nature Total
Gamma 0.4473
Magnitude 1.0414
Maximum eclipse
Duration 3m 28s
Coordinates 18.2N 94.7W
Max. width of band 153 km
Times (UTC)
Greatest eclipse 17:38:30
References
Saros 139 (27 of 71)
Catalog # (SE5000) 9442

The total solar eclipse of March 7, 1970 was visible across all of North America and Central America. 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.

Totality was visible across southern Mexico and across the southeast coast of the United States and Canada. Greatest eclipse occurred over Mexico, with totality lasting 3 minutes and 28 seconds. Totality over the United States lasted up to 3 minutes and 10 seconds.[1] There will not be an eclipse with a greater duration of totality over the contiguous United States until the solar eclipse of April 8, 2024, a period of 54 years.

Contents

  • Scientific effects 1
  • Images 2
  • Related eclipses 3
    • Solar eclipses of 1968-1971 3.1
    • Saros 139 3.2
    • Metonic series 3.3
  • In popular culture 4
  • Notes 5
  • References 6

Scientific effects

The March 7 eclipse slowed a radio transmission of atomic time from North Carolina to Washington, D.C.[2]

Images


Animation of eclipse path (3 minutes per frame)

Related eclipses

Solar eclipses of 1968-1971

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.
Solar eclipse series sets from 1968-1971
Ascending node   Descending node
Saros Map Saros Map
119
March 28, 1968
Partial
124
September 22, 1968
Total
129
March 18, 1969
Annular
134
September 11, 1969
Annular
139
March 7, 1970
Total
144
August 31, 1970
Annular
149
February 25, 1971
Partial
154
August 20, 1971
Partial
A partial solar eclipse of July 22, 1971 occurs in the next lunar year set.

Saros 139

It is a part of saros series 139, repeating every 18 years, 11 days, containing 71 events. The series started with partial solar eclipse on May 17, 1501. It contains hybrid eclipses on August 11, 1627 through December 9, 1825 and total eclipses from December 21, 1843 through March 26, 2601. The series ends at member 71 as a partial eclipse on July 3, 2763. Members in the same column are one exeligmos apart and thus occur in the same geographic area.

The solar eclipse of June 13, 2132 will be the longest total solar eclipse since July 11, 1991 at 6 minutes, 55 seconds.

The longest duration of totality will be produced by member 39 at 7 minutes, 29 seconds on July 16, 2186.[3] This is the longest solar eclipse computed between 4000BC and 6000AD.[4]

Series members 24-39 occur between 1901 and 2200:
24 25 26

February 3, 1916

February 14, 1934

February 25, 1952
27 28 29

March 7, 1970

March 18, 1988

March 29, 2006
30 31 32

April 8, 2024

April 20, 2042

April 30, 2060
33 34 35

May 11, 2078

May 22, 2096

June 3, 2114
36 37 38

June 13, 2132

June 25, 2150

July 5, 2168
39

July 16, 2186

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).

This series has 21 eclipse events between July 31, 1924 and July 31, 2000.

July 31-Aug 1 May 19-20 March 7 December 24-25 October 12
115 117 119 121 123

July 31, 1924

May 19, 1928

March 7, 1932

December 25, 1935

October 12, 1939
125 127 129 131 133

August 1, 1943

May 20, 1947

March 7, 1951

December 25, 1954

October 12, 1958
135 137 139 141 143

July 31, 1962

May 20, 1966

March 7, 1970

December 24, 1973

October 12, 1977
145 147 149 151 153

July 31, 1981

May 19, 1985

March 7, 1989

December 24, 1992

October 12, 1996
155

July 31, 2000

In popular culture

Carly Simon's December 1972 pop hit "You're So Vain" contains the lyric "Then you flew your Learjet up to Nova Scotia to see the total eclipse of the sun," and could only have been a reference to this eclipse, not the one also over Nova Scotia on July 10, 1972, because it was actually written in 1971.

Notes

  1. ^ Espenak, Fred. "TOTAL SOLAR ECLIPSE OF 1970 MAR 07". NASA Eclipse Website.  
  2. ^ Sadeh, D. (1971), Phase variation of a very accurate radio frequency signal due to the solar eclipse, J. Geophys. Res., 76(34), 8427–8429, doi:10.1029/JA076i034p08427
  3. ^ Saros Series Catalog of Solar Eclipses NASA Eclipse Web Site
  4. ^ Ten Millennium Catalog of Long Solar Eclipses, -3999 to +6000 (4000 BCE to 6000 CE) Fred Espinak

References

  • Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
    • Google interactive map
    • Besselian elements

Maps:

  • GoogleMap of totality and partiality limits

News:

  • ABC NEWS 3:40 - March 7, 1970: Total Solar Eclipse The region near Nejapa, Mexico, is first to experience total darkness in midday.

Photos and observations

  • Russia expedition
  • Foto Solar eclipse of March 7, 1970
  • Solar Eclipse Photo Gallery 1 1970-1984, Photographs by Fred Espenak, from Windsor, NC
  • Observations of coronal polarization at the solar eclipse of 7 March, 1970 Polarigraphic observations of the 7 March 1970 eclipse were made at Miahuatlán (Mexico)
  • Solar Eclipse of March 7, 1970 Williamston, NC by Gerard M Foley
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