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    • Source: April 1950 lunar eclipse

      • A total lunar eclipse occurred at the Moonā€™s descending node of orbit on Sunday, April 2, 1950, with an umbral magnitude of 1.0329. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A total lunar eclipse occurs when the Moon's near side entirely passes into the Earth's umbral shadow. Unlike a solar eclipse, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of Earth. A total lunar eclipse can last up to nearly two hours, while a total solar eclipse lasts only a few minutes at any given place, because the Moon's shadow is smaller. Occurring only about 23 hours before perigee (on April 3, 1950, at 20:00 UTC), the Moon's apparent diameter was larger.
      This lunar eclipse was the third of a tetrad, with four total lunar eclipses in series, the others being on April 13, 1949; October 7, 1949; and September 26, 1950.
      This was the first total lunar eclipse of Lunar Saros 131.


      Visibility


      The eclipse was completely visible over much of Africa, Europe, and the western half of Asia, seen rising over South America and setting over east and northeast Asia and Australia.


      Eclipse details


      Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.


      Eclipse season



      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.


      Related eclipses




      = Eclipses in 1950

      =
      An annular solar eclipse on March 18.
      A total lunar eclipse on April 2.
      A total solar eclipse on September 12.
      A total lunar eclipse on September 26.


      = Metonic

      =
      Preceded by: Lunar eclipse of June 14, 1946
      Followed by: Lunar eclipse of January 19, 1954


      = Tzolkinex

      =
      Preceded by: Lunar eclipse of February 20, 1943
      Followed by: Lunar eclipse of May 13, 1957


      = Half-Saros

      =
      Preceded by: Solar eclipse of March 27, 1941
      Followed by: Solar eclipse of April 8, 1959


      = Tritos

      =
      Preceded by: Lunar eclipse of May 3, 1939
      Followed by: Lunar eclipse of March 2, 1961


      = Lunar Saros 131

      =
      Preceded by: Lunar eclipse of March 22, 1932
      Followed by: Lunar eclipse of April 13, 1968


      = Inex

      =
      Preceded by: Lunar eclipse of April 22, 1921
      Followed by: Lunar eclipse of March 13, 1979


      = Triad

      =
      Preceded by: Lunar eclipse of June 1, 1863
      Followed by: Lunar eclipse of January 31, 2037


      = Lunar eclipses of 1948ā€“1951

      =


      = Saros 131

      =
      Lunar Saros series 131, has 72 lunar eclipses. Solar Saros 138 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.
      This eclipse series began in AD 1427 with a partial eclipse at the southern edge of the Earth's shadow when the Moon was close to its descending node. Each successive Saros cycle, the Moon's orbital path is shifted northward with respect to the Earth's shadow, with the first total eclipse occurring in 1950. For the following 252 years, total eclipses occur, with the central eclipse being predicted to occur in 2078. The first partial eclipse after this is predicted to occur in the year 2220, and the final partial eclipse of the series will occur in 2707. The total lifetime of the lunar Saros series 131 is 1280 years. Solar Saros 138 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.
      Because of the ā…“ fraction of days in a Saros cycle, the visibility of each eclipse will differ for an observer at a given fixed locale. For the lunar Saros series 131, the first total eclipse of 1950 had its best visibility for viewers in Eastern Europe and the Middle East because mid-eclipse was at 20:44 UT. The following eclipse in the series occurred approximately 8 hours later in the day with mid-eclipse at 4:47 UT, and was best seen from North America and South America. The third total eclipse occurred approximately 8 hours later in the day than the second eclipse with mid-eclipse at 12:43 UT, and had its best visibility for viewers in the Western Pacific, East Asia, Australia and New Zealand. This cycle of visibility repeats from the initiation to termination of the series, with minor variations. Solar Saros 138 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.
      Lunar Saros series 131, repeating every 18 years and 11 days, has a total of 72 lunar eclipse events including 57 umbral lunar eclipses (42 partial lunar eclipses and 15 total lunar eclipses). Solar Saros 138 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.

      The next occurrence was on April 13, 1968. The previous occurrence was March 22, 1932.


      = Half-Saros cycle

      =
      A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros). This lunar eclipse is related to two total solar eclipses of Solar Saros 138.


      See also


      List of lunar eclipses
      List of 20th-century lunar eclipses


      Notes




      External links


      1950 Apr 02 chart Eclipse Predictions by Fred Espenak, NASA/GSFC

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