A partial lunar eclipse occurred at the Moon’s descending node of orbit on Thursday, November 18, 1937,[1] with an umbral magnitude of 0.1443. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in 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 before perigee (on November 19, 1937, at 0:30 UTC), the Moon's apparent diameter was larger.[2]
| Partial eclipse | |||||||||||||
 The Moon's hourly motion shown right to left | |||||||||||||
| Date | November 18, 1937 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | 0.9421 | ||||||||||||
| Magnitude | 0.1443 | ||||||||||||
| Saros cycle | 115 (53 of 72) | ||||||||||||
| Partiality | 81 minutes, 19 seconds | ||||||||||||
| Penumbral | 254 minutes, 32 seconds | ||||||||||||
| |||||||||||||
Visibility
editThe eclipse was completely visible over much of northeast Asia, North America, and northwestern South America, seen rising over east Asia and Australia and setting over much of South America, west Africa, and western Europe.[3]
|
Eclipse details
editShown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 1.11408 |
| Umbral Magnitude | 0.14432 |
| Gamma | 0.94213 |
| Sun Right Ascension | 15h32m59.8s |
| Sun Declination | -19°09'44.0" |
| Sun Semi-Diameter | 16'11.0" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 03h32m24.7s |
| Moon Declination | +20°06'50.3" |
| Moon Semi-Diameter | 16'41.3" |
| Moon Equatorial Horizontal Parallax | 1°01'14.9" |
| ΔT | 23.9 s |
Eclipse season
editThis 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.
| November 18 Descending node (full moon) |
December 2 Ascending node (new moon) |
|---|---|
| |
|
| Partial lunar eclipse Lunar Saros 115 |
Annular solar eclipse Solar Saros 141 |
Related eclipses
editEclipses in 1937
edit- 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
edit- Preceded by: Lunar eclipse of January 30, 1934
- Followed by: Lunar eclipse of September 5, 1941
Tzolkinex
edit- Preceded by: Lunar eclipse of October 7, 1930
- Followed by: Lunar eclipse of December 29, 1944
Half-Saros
edit- Preceded by: Solar eclipse of November 12, 1928
- Followed by: Solar eclipse of November 23, 1946
Tritos
edit- Preceded by: Lunar eclipse of December 19, 1926
- Followed by: Lunar eclipse of October 18, 1948
Lunar Saros 115
edit- Preceded by: Lunar eclipse of November 7, 1919
- Followed by: Lunar eclipse of November 29, 1955
Inex
edit- Preceded by: Lunar eclipse of December 7, 1908
- Followed by: Lunar eclipse of October 29, 1966
Triad
edit- Preceded by: Lunar eclipse of January 17, 1851
- Followed by: Lunar eclipse of September 18, 2024
Lunar eclipses of 1937–1940
edit| Ascending node | Descending node | |||||
|---|---|---|---|---|---|---|
| Saros | Date viewing |
Type chart |
Saros | Date viewing |
Type chart | |
| 110 | 1937 May 25
|
Penumbral
|
115 | 1937 Nov 18
|
Partial
| |
| 120 | 1938 May 14
|
Total
|
125 | 1938 Nov 07
|
Total
| |
| 130 | 1939 May 03
|
Total
|
135 | 1939 Oct 28
|
Partial
| |
| 140 | 1940 Apr 22
|
Penumbral
|
145 | 1940 Oct 16
|
Penumbral
| |
Half-Saros cycle
editA lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[5] This lunar eclipse is related to two partial solar eclipses of Solar Saros 122.
| November 12, 1928 | November 23, 1946 |
|---|---|
|
|
See also
editNotes
edit- ^ "November 17–18, 1937 Partial Lunar Eclipse". timeanddate. Retrieved 18 December 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 18 December 2024.
- ^ "Partial Lunar Eclipse of 1937 Nov 18" (PDF). NASA. Retrieved 18 December 2024.
- ^ "Partial Lunar Eclipse of 1937 Nov 18". EclipseWise.com. Retrieved 18 December 2024.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit- 1937 Nov 18 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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