March 1933 lunar eclipse

March 1933 lunar eclipse

Penumbral eclipse
The Moon's hourly motion shown right to left
Date	March 12, 1933
Gamma	−1.2369
Magnitude	−0.4153
Saros cycle	141 (19 of 73)
Penumbral	206 minutes, 15 seconds
Contacts (UTC) P1 0:49:38 Greatest 2:32:40 P4 4:15:53

A penumbral lunar eclipse occurred at the Moon’s descending node of orbit on Sunday, March 12, 1933,[1] with an umbral magnitude of −0.4153. 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 3.5 days before perigee (on March 15, 1933, at 17:25 UTC), the Moon's apparent diameter was larger.[2]

This eclipse was the second of four penumbral lunar eclipses in 1933, with the others occurring on February 10, August 5, and September 4.

Visibility

The eclipse was completely visible over eastern North America, South America, and much of Africa and Europe, seen rising over western North America and the eastern Pacific Ocean and setting over east Africa and west, central, and south Asia.[3]

Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]

March 12, 1933 Lunar Eclipse Parameters

Parameter	Value
Penumbral Magnitude	0.59243
Umbral Magnitude	−0.41533
Gamma	−1.23688
Sun Right Ascension	23h27m13.2s
Sun Declination	-03°32'18.1"
Sun Semi-Diameter	16'05.6"
Sun Equatorial Horizontal Parallax	08.8"
Moon Right Ascension	11h24m53.7s
Moon Declination	+02°28'43.1"
Moon Semi-Diameter	15'58.2"
Moon Equatorial Horizontal Parallax	0°58'36.5"
ΔT	23.9 s

Eclipse season

See also: Eclipse cycle

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.

Eclipse season of February–March 1933

February 10 Descending node (full moon)	February 24 Ascending node (new moon)	March 12 Descending node (full moon)
Penumbral lunar eclipse Lunar Saros 103	Annular solar eclipse Solar Saros 129	Penumbral lunar eclipse Lunar Saros 141

Related eclipses

Eclipses in 1933

• 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

• Preceded by: Lunar eclipse of May 23, 1929
• Followed by: Lunar eclipse of December 28, 1936

Tzolkinex

• Preceded by: Lunar eclipse of January 28, 1926
• Followed by: Lunar eclipse of April 22, 1940

Half-Saros

• Preceded by: Solar eclipse of March 5, 1924
• Followed by: Solar eclipse of March 16, 1942

Tritos

• Preceded by: Lunar eclipse of April 11, 1922
• Followed by: Lunar eclipse of February 9, 1944

Lunar Saros 141

• Preceded by: Lunar eclipse of March 1, 1915
• Followed by: Lunar eclipse of March 23, 1951

Inex

• Preceded by: Lunar eclipse of March 31, 1904
• Followed by: Lunar eclipse of February 19, 1962

Triad

• Preceded by: Lunar eclipse of May 11, 1846
• Followed by: Lunar eclipse of January 10, 2020

Lunar eclipses of 1930–1933

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 eclipses on February 10, 1933 and August 5, 1933 occur in the next lunar year eclipse set.

Lunar eclipse series sets from 1930 to 1933
Descending node					Ascending node
Saros	Date Viewing	Type Chart	Gamma		Saros	Date Viewing	Type Chart	Gamma
111	1930 Apr 13	Partial	0.9545		116	1930 Oct 07	Partial	−0.9812
121	1931 Apr 02	Total	0.2043		126	1931 Sep 26	Total	−0.2698
131	1932 Mar 22	Partial	−0.4956		136	1932 Sep 14	Partial	0.4664
141	1933 Mar 12	Penumbral	−1.2369		146	1933 Sep 04	Penumbral	1.1776

Saros 141

Lunar Saros 141, repeating every 18 years and 11 days, has a total of 72 lunar eclipse events including 26 total lunar eclipses.

First Penumbral Lunar Eclipse: 1608 Aug 25

First Partial Lunar Eclipse: 2041 May 16

First Total Lunar Eclipse: 2167 Aug 01

First Central Lunar Eclipse: 2221 Sep 02

Greatest Eclipse of the Lunar Saros 141: 2293 Oct 16

Last Central Lunar Eclipse: 2546 Mar 18

Last Total Lunar Eclipse: 2618 May 01

Last Partial Lunar Eclipse: 2744 Jul 16

Last Penumbral Lunar Eclipse: 2888 Oct 11

1901-2100

March 1915 lunar eclipse

March 1933 lunar eclipse

March 1951 lunar eclipse

April 1969 lunar eclipse

April 1987 lunar eclipse

April 2005 lunar eclipse

May 2023 lunar eclipse

May 2041 lunar eclipse

May 2059 lunar eclipse

June 2077 lunar eclipse

June 2095 lunar eclipse

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[6] This lunar eclipse is related to two total solar eclipses of Solar Saros 148.

March 5, 1924	March 16, 1942

See also

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

Notes

1. "March 11–12, 1933 Penumbral Lunar Eclipse". timeanddate. Retrieved 16 December 2024.
2. "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 16 December 2024.
3. "Penumbral Lunar Eclipse of 1933 Mar 12" (PDF). NASA. Retrieved 16 December 2024.
4. "Penumbral Lunar Eclipse of 1933 Mar 12". EclipseWise.com. Retrieved 16 December 2024.
5. van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.
6. Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros

External links

• 1933 Mar 12 chart Eclipse Predictions by Fred Espenak, NASA/GSFC