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    • Source: April 1940 lunar eclipse

      • A penumbral lunar eclipse will occur at the Moon’s ascending node of orbit on Monday, April 22, 1940, with an umbral magnitude of −0.0945. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into the Earth's penumbra. 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. Occurring about 2.7 days after perigee (on April 20, 1940, at 20:20 UTC), the Moon's apparent diameter was larger.


      Visibility


      The eclipse was completely visible over much of North America, South America, west Africa, and Antarctica, seen rising over northwestern North America and the central Pacific Ocean and setting over Africa, Europe, and the Middle East.


      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. The first and last eclipse in this sequence is separated by one synodic month.


      Related eclipses




      = Eclipses in 1940

      =
      A penumbral lunar eclipse on March 23.
      An annular solar eclipse on April 7.
      A penumbral lunar eclipse on April 22.
      A total solar eclipse on October 1.
      A penumbral lunar eclipse on October 16.


      = Metonic

      =
      Preceded by: Lunar eclipse of July 4, 1936
      Followed by: Lunar eclipse of February 9, 1944


      = Tzolkinex

      =
      Preceded by: Lunar eclipse of March 12, 1933
      Followed by: Lunar eclipse of June 3, 1947


      = Half-Saros

      =
      Preceded by: Solar eclipse of April 18, 1931
      Followed by: Solar eclipse of April 28, 1949


      = Tritos

      =
      Preceded by: Lunar eclipse of May 23, 1929
      Followed by: Lunar eclipse of March 23, 1951


      = Lunar Saros 140

      =
      Preceded by: Lunar eclipse of April 11, 1922
      Followed by: Lunar eclipse of May 3, 1958


      = Inex

      =
      Preceded by: Lunar eclipse of May 13, 1911
      Followed by: Lunar eclipse of April 2, 1969


      = Triad

      =
      Preceded by: Lunar eclipse of June 21, 1853
      Followed by: Lunar eclipse of February 20, 2027


      = Lunar eclipses of 1937–1940

      =


      = Saros 140

      =
      It was part of Saros series 140.


      = 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 partial solar eclipses of Solar Saros 147.


      See also


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


      Notes




      External links


      1940 Apr 22 chart Eclipse Predictions by Fred Espenak, NASA/GSFC

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