September 1933 lunar eclipse
| Penumbral eclipse | |||||||||
 The Moon's hourly motion shown right to left | |||||||||
| Date | September 4, 1933 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Gamma | 1.1776 | ||||||||
| Magnitude | −0.3012 | ||||||||
| Saros cycle | 146 (6 of 72) | ||||||||
| Penumbral | 221 minutes, 24 seconds | ||||||||
| |||||||||
A penumbral lunar eclipse will occur at the Moon’s ascending node of orbit on Monday, September 4, 1933,[1] with an umbral magnitude of −0.7336. 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 3.9 days after perigee (on August 31, 1933, at 6:30 UTC), the Moon's apparent diameter was larger.[2]
This eclipse was the last of four penumbral lunar eclipses in 1933, with the others occurring on February 10, March 12, and August 5.
Visibility
[edit]The eclipse was completely visible over much of North and South America, seen rising over northwestern North America and the central Pacific Ocean and setting over Africa and Europe.[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 | 0.69558 |
| Umbral Magnitude | −0.30117 |
| Gamma | 1.17763 |
| Sun Right Ascension | 10h50m36.8s |
| Sun Declination | +07°22'09.8" |
| Sun Semi-Diameter | 15'51.8" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 22h48m27.5s |
| Moon Declination | -06°21'19.9" |
| Moon Semi-Diameter | 15'54.9" |
| Moon Equatorial Horizontal Parallax | 0°58'24.5" |
| 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. The first and last eclipse in this sequence is separated by one synodic month.
| August 5 Ascending node (full moon) |
August 21 Descending node (new moon) |
September 4 Ascending node (full moon) |
|---|---|---|
 |
 |
|
| Penumbral lunar eclipse Lunar Saros 108 |
Annular solar eclipse Solar Saros 134 |
Penumbral lunar eclipse Lunar Saros 146 |
Related eclipses
[edit]Eclipses in 1933
[edit]- A penumbral lunar eclipse on February 10.
- An annular solar eclipse on February 24.
- A penumbral lunar eclipse on March 12.
- A penumbral lunar eclipse on August 5.
- An annular solar eclipse on August 21.
- A penumbral lunar eclipse on September 4.
Metonic
[edit]- Preceded by: Lunar eclipse of November 17, 1929
Tzolkinex
[edit]- Preceded by: Lunar eclipse of July 25, 1926
- Followed by: Lunar eclipse of October 16, 1940
Half-Saros
[edit]- Preceded by: Solar eclipse of August 30, 1924
- Followed by: Solar eclipse of September 10, 1942
Tritos
[edit]- Preceded by: Lunar eclipse of October 6, 1922
- Followed by: Lunar eclipse of August 4, 1944
Lunar Saros 146
[edit]- Preceded by: Lunar eclipse of August 24, 1915
- Followed by: Lunar eclipse of September 15, 1951
Inex
[edit]- Preceded by: Lunar eclipse of September 24, 1904
- Followed by: Lunar eclipse of August 15, 1962
Triad
[edit]- Preceded by: Lunar eclipse of November 3, 1846
- Followed by: Lunar eclipse of July 5, 2020
Lunar eclipses of 1930–1933
[edit]| Descending node | Ascending node | |||||
|---|---|---|---|---|---|---|
| Saros | Date viewing |
Type chart |
Saros | Date viewing |
Type chart | |
| 111 | 1930 Apr 13
|
Partial
|
116 | 1930 Oct 07
|
Partial
| |
| 121 | 1931 Apr 02
|
Total
|
126 | 1931 Sep 26
|
Total
| |
| 131 | 1932 Mar 22
|
Partial
|
136 | 1932 Sep 14
|
Partial
| |
| 141 | 1933 Mar 12
|
Penumbral
|
146 | 1933 Sep 04
|
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 total solar eclipses of Solar Saros 153.
| August 30, 1924 | September 10, 1942 |
|---|---|
|
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See also
[edit]External links
[edit]- Saros series 146
- 1933 Sep 04 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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 | This lunar eclipse-related article is a stub. You can help Wikipedia by expanding it. |
- ^ "September 3–4, 1933 Penumbral Lunar Eclipse". timeanddate. Retrieved 16 December 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 16 December 2024.
- ^ "Penumbral Lunar Eclipse of 1933 Sep 04" (PDF). NASA. Retrieved 16 December 2024.
- ^ "Penumbral Lunar Eclipse of 1933 Sep 04". EclipseWise.com. Retrieved 16 December 2024.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros