December 1936 lunar eclipse
| Penumbral eclipse | |||||||||
 The Moon's hourly motion shown right to left | |||||||||
| Date | December 28, 1936 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Gamma | −1.0971 | ||||||||
| Magnitude | −0.1550 | ||||||||
| Saros cycle | 143 (14 of 73) | ||||||||
| Penumbral | 235 minutes, 31 seconds | ||||||||
| |||||||||
A penumbral lunar eclipse will occur at the Moon’s descending node of orbit on Monday, December 28, 1936,[1] with an umbral magnitude of −0.1550. 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 2.3 days after perigee (on December 25, 1936, at 20:45 UTC), the Moon's apparent diameter was larger.[2]
Visibility
[edit]The eclipse was completely visible over North and South America, west Africa, and Europe, seen rising over the central Pacific Ocean and setting over central Africa, east Africa, west Asia, and central Asia.[3]
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Eclipse details
[edit]Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 0.84510 |
| Umbral Magnitude | −0.15495 |
| Gamma | −1.09705 |
| Sun Right Ascension | 18h27m15.3s |
| Sun Declination | -23°17'57.2" |
| Sun Semi-Diameter | 16'16.0" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 06h26m34.6s |
| Moon Declination | +22°13'08.7" |
| Moon Semi-Diameter | 16'15.9" |
| Moon Equatorial Horizontal Parallax | 0°59'41.6" |
| ΔT | 23.9 s |
Eclipse season
[edit]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.
| December 13 Ascending node (new moon) |
December 28 Descending node (full moon) |
|---|---|
 |
|
| Annular solar eclipse Solar Saros 131 |
Penumbral lunar eclipse Lunar Saros 143 |
Related eclipses
[edit]Eclipses in 1936
[edit]- A total lunar eclipse on January 8.
- A total solar eclipse on June 19.
- A partial lunar eclipse on July 4.
- An annular solar eclipse on December 13.
- A penumbral lunar eclipse on December 28.
Metonic
[edit]- Preceded by: Lunar eclipse of March 12, 1933
- Followed by: Lunar eclipse of October 16, 1940
Tzolkinex
[edit]- Preceded by: Lunar eclipse of November 17, 1929
- Followed by: Lunar eclipse of February 9, 1944
Half-Saros
[edit]- Preceded by: Solar eclipse of December 24, 1927
- Followed by: Solar eclipse of January 3, 1946
Tritos
[edit]- Preceded by: Lunar eclipse of January 28, 1926
- Followed by: Lunar eclipse of November 28, 1947
Lunar Saros 143
[edit]- Preceded by: Lunar eclipse of December 17, 1918
- Followed by: Lunar eclipse of January 8, 1955
Inex
[edit]- Preceded by: Lunar eclipse of January 18, 1908
- Followed by: Lunar eclipse of December 8, 1965
Triad
[edit]- Preceded by: Lunar eclipse of February 26, 1850
- Followed by: Lunar eclipse of October 28, 2023
Lunar eclipses of 1933–1936
[edit]| Descending node | Ascending node | |||||
|---|---|---|---|---|---|---|
| Saros | Date Viewing |
Type Chart |
Saros | Date Viewing |
Type Chart | |
| 103 | 1933 Feb 10
|
Penumbral
|
108 | 1933 Aug 05
|
Penumbral
| |
| 113 | 1934 Jan 30
|
Partial
|
118 | 1934 Jul 26
|
Partial
| |
| 123 | 1935 Jan 19
|
Total
|
128 | 1935 Jul 16
|
Total
| |
| 133 | 1936 Jan 08
|
Total
|
138 | 1936 Jul 04
|
Partial
| |
| 143 | 1936 Dec 28
|
Penumbral
| ||||
Half-Saros cycle
[edit]A 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 150.
| December 24, 1927 | January 3, 1946 |
|---|---|
|
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See also
[edit]Notes
[edit]- ^ "December 27–28, 1936 Penumbral Lunar Eclipse". timeanddate. Retrieved 17 December 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 17 December 2024.
- ^ "Penumbral Lunar Eclipse of 1936 Dec 28" (PDF). NASA. Retrieved 17 December 2024.
- ^ "Penumbral Lunar Eclipse of 1936 Dec 28". EclipseWise.com. Retrieved 17 December 2024.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit]- 1936 Dec 28 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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