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]
| 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 | ||||||||||||
| |||||||||||||
Visibility
editThe 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
edit-
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
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Eclipse details
editShown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| 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
editThis 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.
| 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
editEclipses in 2012
edit- 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
edit- Preceded by: Lunar eclipse of August 16, 2008
- Followed by: Lunar eclipse of March 23, 2016
Tzolkinex
edit- Preceded by: Lunar eclipse of April 24, 2005
- Followed by: Lunar eclipse of July 16, 2019
Half-Saros
edit- Preceded by: Solar eclipse of May 31, 2003
- Followed by: Solar eclipse of June 10, 2021
Tritos
edit- Preceded by: Lunar eclipse of July 5, 2001
- Followed by: Lunar eclipse of May 5, 2023
Lunar Saros 140
edit- Preceded by: Lunar eclipse of May 25, 1994
- Followed by: Lunar eclipse of June 15, 2030
Inex
edit- Preceded by: Lunar eclipse of June 25, 1983
- Followed by: Lunar eclipse of May 16, 2041
Triad
edit- Preceded by: Lunar eclipse of August 4, 1925
- Followed by: Lunar eclipse of April 5, 2099
Lunar eclipses of 2009–2013
editThis 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 | |||||
Half-Saros cycle
editA 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 |
|---|---|
|
|
See also
editReferences
edit- ^ "June 3–4, 2012 Partial Lunar Eclipse". timeanddate. Retrieved 15 November 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 15 November 2024.
- ^ "Partial Lunar Eclipse of 2012 Jun 04" (PDF). NASA. Retrieved 15 November 2024.
- ^ "Partial Lunar Eclipse of 2012 Jun 04". EclipseWise.com. Retrieved 15 November 2024.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit
- 2012 Jun 04 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC
- Hermit eclipse: 2012-06-04
- NightSkyInfo.com: Lunar Eclipse Monday, 4 June 2012
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