A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Monday, June 4, 2012, 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 after perigee (on June 3, 2012, at 9:15 UTC), the Moon's apparent diameter was larger.
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.
Hourly motion shown right to leftThe Moon's hourly motion across the Earth's shadow in the constellation of Ophiuchus (north of Scorpius). Visibility map
Gallery
Eclipse details Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.
+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 20Descending node (new moon) June 4Ascending node (full moon) Annular solar eclipseSolar Saros 128 Partial lunar eclipseLunar Saros 140
Related eclipses Eclipses in 2012 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.
Metonic Preceded by: Lunar eclipse of August 16, 2008 Followed by: Lunar eclipse of March 23, 2016
Tzolkinex Preceded by: Lunar eclipse of April 24, 2005 Followed by: Lunar eclipse of July 16, 2019
Half-Saros Preceded by: Solar eclipse of May 31, 2003 Followed by: Solar eclipse of June 10, 2021
Tritos Preceded by: Lunar eclipse of July 5, 2001 Followed by: Lunar eclipse of May 5, 2023
Lunar Saros 140 Preceded by: Lunar eclipse of May 25, 1994 Followed by: Lunar eclipse of June 15, 2030
Inex Preceded by: Lunar eclipse of June 25, 1983 Followed by: Lunar eclipse of May 16, 2041
Triad Preceded by: Lunar eclipse of August 4, 1925 Followed by: Lunar eclipse of April 5, 2099
Lunar eclipses of 2009–2013
Saros 140
Tritos series
Inex series
Half-Saros cycle A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros This lunar eclipse is related to two annular solar eclipses of Solar Saros 147. May 31, 2003June 10, 2021
See also List of lunar eclipses and List of 21st-century lunar eclipses
References
External links
Hermit eclipse: 2012-06-04 NightSkyInfo.com: Lunar Eclipse Monday, 4 June 2012