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June 2012 lunar eclipse
Partial eclipse
	Totality as viewed from Brisbane, Australia, 11:06 UTC
Date	June 4, 2012
Gamma	0.8248
Magnitude	0.3718
Saros cycle	140 (25 of 80)
Partiality	126 minutes, 35 seconds
Penumbral	270 minutes, 2 seconds
P1
Contacts (UTC)
P1	8:48:11
U1	9:59:53
Greatest	11:03:12
U4	12:06:28
P4	13:18:13
	← December 2011 November 2012 →

A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Sunday, June 4, 2012,^[1] with an umbral magnitude of 0.3718. 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 about 1.1 days before perigee (on June 3, 2012, at 9:15 UTC), the Moon's apparent diameter was larger.^[2]

Visibility

The eclipse was completely visible over Australia, Antarctica, and the Pacific Ocean, seen rising over east Asia and setting over North and South America.^[3]

	Hourly motion shown right to left	The Moon's hourly motion across the Earth's shadow in the constellation of Ophiuchus (north of Scorpius).
Visibility map

Gallery

Elko, Nevada, 10:58 UTC
Redcliffe, Queensland, 11:06 UTC
Albuquerque, New Mexico, 11:20 UTC
Marikina, Philippines, 11:33 UTC
From Beijing at moonrise, 12:09 UTC
Time lapse image from Villa Gesell, Argentina

Eclipse details

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

June 4, 2012 Lunar Eclipse Parameters
Parameter	Value
Penumbral Magnitude	1.31975
Umbral Magnitude	0.37184
Gamma	0.82480
Sun Right Ascension	04h51m33.3s
Sun Declination	+22°30'16.0"
Sun Semi-Diameter	15'45.9"
Sun Equatorial Horizontal Parallax	08.7"
Moon Right Ascension	16h51m37.6s
Moon Declination	-21°39'56.2"
Moon Semi-Diameter	16'37.9"
Moon Equatorial Horizontal Parallax	1°01'02.3"
ΔT	66.8 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.

Eclipse season of May–June 2012
May 20 Descending node (new moon)	June 4 Ascending node (full moon)

Annular solar eclipse Solar Saros 128	Partial lunar eclipse Lunar Saros 140

Related eclipses

Lunar eclipses of 2009–2013

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 9, 2009 and August 6, 2009 occur in the previous lunar year eclipse set, and the lunar eclipses on April 25, 2013 (partial) and October 18, 2013 (penumbral) occur in the next lunar year eclipse set.

Lunar eclipse series sets from 2009 to 2013
Ascending node				Descending node
Saros	Date Viewing	Type Chart	Gamma	Saros	Date Viewing	Type Chart	Gamma
110	2009 Jul 07	Penumbral	−1.4916	115	2009 Dec 31	Partial	0.9766
120	2010 Jun 26	Partial	−0.7091	125	2010 Dec 21	Total	0.3214
130	2011 Jun 15	Total	0.0897	135	2011 Dec 10	Total	−0.3882
140	2012 Jun 04	Partial	0.8248	145	2012 Nov 28	Penumbral	−1.0869
150	2013 May 25	Penumbral	1.5351

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 annular solar eclipses of Solar Saros 147.