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May 1937 lunar eclipse
Penumbral lunar eclipse May 25, 1937. From Wikipedia, the free encyclopedia
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A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Tuesday, May 25, 1937,[1] with an umbral magnitude of −0.3033. 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 only about 18 hours after apogee (on May 24, 1937, at 13:30 UTC), the Moon's apparent diameter was smaller.[2]
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Visibility
The eclipse was completely visible over much of North America, western and central South America, and Antarctica, seen rising over Australia and setting over northeastern North America, eastern South America, and west Africa.[3]
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Eclipse details
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
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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
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Eclipses in 1937
- A penumbral lunar eclipse on May 25.
- A total solar eclipse on June 8.
- A partial lunar eclipse on November 18.
- An annular solar eclipse on December 2.
Metonic
- Preceded by: Lunar eclipse of August 5, 1933
- Followed by: Lunar eclipse of March 13, 1941
Tzolkinex
- Preceded by: Lunar eclipse of April 13, 1930
- Followed by: Lunar eclipse of July 6, 1944
Half-Saros
- Preceded by: Solar eclipse of May 19, 1928
- Followed by: Solar eclipse of May 30, 1946
Tritos
- Preceded by: Lunar eclipse of June 25, 1926
- Followed by: Lunar eclipse of April 23, 1948
Lunar Saros 110
- Preceded by: Lunar eclipse of May 15, 1919
- Followed by: Lunar eclipse of June 5, 1955
Inex
- Preceded by: Lunar eclipse of June 14, 1908
- Followed by: Lunar eclipse of May 4, 1966
Triad
- Preceded by: Lunar eclipse of July 24, 1850
- Followed by: Lunar eclipse of March 25, 2024
Lunar eclipses of 1937–1940
This eclipse is a member of a semester series. An eclipse in a semester series of lunar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[5]
The penumbral lunar eclipse on March 23, 1940 occurs in the next lunar year eclipse set.
Saros 110
This eclipse is a part of Saros series 110, repeating every 18 years, 11 days, and containing 72 events. The series started with a penumbral lunar eclipse on May 28, 747 AD. It contains partial eclipses from August 23, 891 AD through April 18, 1288; total eclipses from April 29, 1306 through September 5, 1522; and a second set of partial eclipses from September 16, 1540 through April 22, 1883. The series ends at member 72 as a penumbral eclipse on July 18, 2027.
The longest duration of totality was produced by member 38 at 103 minutes, 8 seconds on July 3, 1414. All eclipses in this series occur at the Moon’s ascending node of orbit.[6]
Eclipses are tabulated in three columns; every third eclipse in the same column is one exeligmos apart, so they all cast shadows over approximately the same parts of the Earth.
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.
Inex series
This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[8] This lunar eclipse is related to one total and one partial = two solar eclipses of Solar Saros 117.
May 19, 1928 | May 30, 1946 |
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Notes
External links
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