June 2012 lunar eclipse

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
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]

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

• 
  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

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

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

• An annular solar eclipse on May 20.
• A partial lunar eclipse on June 4.
• A total solar eclipse on November 13.
• A penumbral lunar eclipse on November 28.

• Preceded by: Lunar eclipse of August 16, 2008
• Followed by: Lunar eclipse of March 23, 2016

• Preceded by: Lunar eclipse of April 24, 2005
• Followed by: Lunar eclipse of July 16, 2019

• Preceded by: Solar eclipse of May 31, 2003
• Followed by: Solar eclipse of June 10, 2021

• Preceded by: Lunar eclipse of July 5, 2001
• Followed by: Lunar eclipse of May 5, 2023

• Preceded by: Lunar eclipse of May 25, 1994
• Followed by: Lunar eclipse of June 15, 2030

• Preceded by: Lunar eclipse of June 25, 1983
• Followed by: Lunar eclipse of May 16, 2041

• Preceded by: Lunar eclipse of August 4, 1925
• Followed by: Lunar eclipse of April 5, 2099

This eclipse was one of five lunar eclipses in a short-lived series. The lunar year series repeats after 12 lunations or 354 days (Shifting back about 10 days in sequential years). Because of the date shift, the Earth's shadow will be about 11 degrees west in sequential events.

Lunar eclipse series sets from 2009–2013
Ascending node					Descending node
Saros # Photo	Date Viewing	Type chart	Gamma		Saros # Photo	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
Last set	2009 Aug 06				Last set	2009 Feb 9
Next set	2013 Apr 25				Next set	2013 Oct 18

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 annular solar eclipses of Solar Saros 147.

May 31, 2003	June 10, 2021

• List of lunar eclipses and List of 21st-century lunar eclipses

• 2012 Jun 04 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC
• Hermit eclipse: 2012-06-04
• NightSkyInfo.com: Lunar Eclipse Monday, 4 June 2012