February 1933 lunar eclipse

February 1933 lunar eclipse
Penumbral eclipse
	The Moon's hourly motion shown right to left
Date	February 10, 1933
Gamma	1.5600
Magnitude	−1.0268
Saros cycle	103 (83 of 84)
Penumbral	39 minutes, 34 seconds
P1
Contacts (UTC)
P1	12:57:32
Greatest	13:17:09
P4	13:37:06
	← September 1932 March 1933 →

A penumbral lunar eclipse occurred at the Moon’s descending node of orbit on Friday, February 10, 1933,^[1] with an umbral magnitude of −1.0268. 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. The Moon's apparent diameter was near the average diameter because it occurred 6.7 days after apogee (on February 3, 1933, at 21:10 UTC) and 7.9 days before perigee (on February 18, 1933, at 10:50 UTC).^[2]

This eclipse was the first of four penumbral lunar eclipses in 1933, with the others occurring on March 12, August 5, and September 4.

Visibility

The eclipse was completely visible over much of Asia, Australia, and western North America.^[3]

Eclipse details

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

February 10, 1933 Lunar Eclipse Parameters
Parameter	Value
Penumbral Magnitude	0.01836
Umbral Magnitude	−1.02680
Gamma	1.56004
Sun Right Ascension	21h35m02.2s
Sun Declination	-14°22'59.8"
Sun Semi-Diameter	16'12.3"
Sun Equatorial Horizontal Parallax	08.9"
Moon Right Ascension	09h37m33.3s
Moon Declination	+15°43'55.4"
Moon Semi-Diameter	15'30.3"
Moon Equatorial Horizontal Parallax	0°56'54.2"
ΔT	23.9 s

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. 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

Lunar eclipses of 1933–1936

Lunar eclipse series sets from 1933–1936
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