June 2010 lunar eclipse

A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Saturday, June 26, 2010,^[1] with an umbral magnitude of 0.5383. 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 4.7 days before apogee (on July 1, 2010, at 6:10 UTC), the Moon's apparent diameter was smaller.^[2]

June 2010 lunar eclipse

Partial eclipse
Partiality as viewed from Canberra, Australia, 11:31 UTC
Date	June 26, 2010
Gamma	−0.7091
Magnitude	0.5383
Saros cycle	120 (58 of 84)
Partiality	162 minutes, 52 seconds
Penumbral	322 minutes, 7 seconds
Contacts (UTC) P1 8:57:24 U1 10:16:58 Greatest 11:38:27 U4 12:59:50 P4 14:19:31
← December 2009 December 2010 →

Visibility

The eclipse was completely visible over much of Australia and the Pacific Ocean, seen rising over 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 Sagittarius.
Visibility map

Images

NASA chart of the eclipse

Gallery

• 
  Dallas, Texas, 10:28 UTC
• 
  Villa Gesell, Argentina, 10:29 UTC
• 
  Albuquerque, New Mexico, 10:54 UTC
• 
  Vancouver, Canada, 11:07 UTC
• 
  Hobart, Australia, 11:09 UTC
• 
  Auckland, New Zealand, 11:17 UTC
• 
  Sapporo, Japan, 11:36 UTC
• 
  Animation from California

Timing

The eclipse was seen before sunrise on Saturday morning setting over western North and South America.

Times of over North America

Event	PDT (UTC−7)	MDT (UTC−6)	CDT (UTC−5)	EDT (UTC−4)	UTC
Start penumbral (P1)	1:57 a.m.	2:57 a.m.	3:57 a.m.	4:57 a.m.	8:57 a.m.
Start umbral (U1)	3:17 a.m.	4:17 a.m.	5:17 a.m.	6:17 a.m.	10:17 a.m.
Greatest eclipse	4:38 a.m.	5:38 a.m.	Set	Set	11:38 a.m.
End umbral (U4)	Set	Set	Set	Set	1:00 p.m.
End penumbral (P4)	Set	Set	Set	Set	2:20 p.m.

Eclipse details

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

June 26, 2010 Lunar Eclipse Parameters

Parameter	Value
Penumbral Magnitude	1.57888
Umbral Magnitude	0.53830
Gamma	−0.70911
Sun Right Ascension	06h20m48.6s
Sun Declination	+23°21'07.6"
Sun Semi-Diameter	15'44.1"
Sun Equatorial Horizontal Parallax	08.7"
Moon Right Ascension	18h21m11.8s
Moon Declination	-24°00'06.9"
Moon Semi-Diameter	15'07.3"
Moon Equatorial Horizontal Parallax	0°55'29.7"
ΔT	66.2 s

Eclipse season

See also: Eclipse cycle

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 June–July 2010

June 26 Ascending node (full moon)	July 11 Descending node (new moon)
Partial lunar eclipse Lunar Saros 120	Total solar eclipse Solar Saros 146

Related eclipses

Eclipses in 2010

• An annular solar eclipse on January 15.
• A partial lunar eclipse on June 26.
• A total solar eclipse on July 11.
• A total lunar eclipse on December 21.

Metonic

• Preceded by: Lunar eclipse of September 5, 2006
• Followed by: Lunar eclipse of April 15, 2014

Tzolkinex

• Preceded by: Lunar eclipse of May 16, 2003
• Followed by: Lunar eclipse of August 7, 2017

Half-Saros

• Preceded by: Solar eclipse of June 21, 2001
• Followed by: Solar eclipse of July 2, 2019

Tritos

• Preceded by: Lunar eclipse of July 28, 1999
• Followed by: Lunar eclipse of May 26, 2021

Lunar Saros 120

• Preceded by: Lunar eclipse of June 15, 1992
• Followed by: Lunar eclipse of July 6, 2028

Inex

• Preceded by: Lunar eclipse of July 17, 1981
• Followed by: Lunar eclipse of June 6, 2039

Triad

• Preceded by: Lunar eclipse of August 26, 1923
• Followed by: Lunar eclipse of April 26, 2097

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

Metonic series

The Metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the Earth's shadow will be in nearly the same location relative to the background stars.

Ascending node	Descending node
1991 Jun 27 - penumbral (110) 2010 Jun 26 - partial (120) 2029 Jun 26 - total (130) 2048 Jun 26 - partial (140) 2067 Jun 27 - penumbral (150)	1991 Dec 21 - partial (115) 2010 Dec 21 - total (125) 2029 Dec 20 - total (135) 2048 Dec 20 - partial (145)

Saros 120

This eclipse is a part of Saros series 120, repeating every 18 years, 11 days, and containing 83 events. The series started with a penumbral lunar eclipse on October 16, 1000. It contains partial eclipses from May 31, 1379 through August 4, 1487; total eclipses from August 14, 1505 through May 14, 1938; and a second set of partial eclipses from May 24, 1956 through July 28, 2064. The series ends at member 83 as a penumbral eclipse on April 7, 2479.

The longest duration of totality was produced by member 43 at 104 minutes, 55 seconds on January 24, 1758. All eclipses in this series occur at the Moon’s ascending node of orbit.^[6]

Greatest	First
The greatest eclipse of the series occurred on 1758 Jan 24, lasting 104 minutes, 55 seconds.[7]	Penumbral	Partial	Total	Central
	1000 Oct 16	1379 May 31	1505 Aug 14	1559 Sep 16
	Last
	Central	Total	Partial	Penumbral
	1902 Apr 22	1938 May 14	2064 Jul 28	2479 Apr 07

Eclipses are tabulated in three columns; every third eclipse in the same column is one exeligmos apart, so they all cast shadows over approximately the same parts of the Earth.

Series members 46–67 occur between 1801 and 2200:
46		47		48
1812 Feb 27		1830 Mar 09		1848 Mar 19
49		50		51
1866 Mar 31		1884 Apr 10		1902 Apr 22
52		53		54
1920 May 03		1938 May 14		1956 May 24
55		56		57
1974 Jun 04		1992 Jun 15		2010 Jun 26
58		59		60
2028 Jul 06		2046 Jul 18		2064 Jul 28
61		62		63
2082 Aug 08		2100 Aug 19		2118 Aug 31
64		65		66
2136 Sep 10		2154 Sep 21		2172 Oct 02
67
2190 Oct 13

Tritos series

This eclipse is a part of a tritos cycle, repeating at alternating nodes every 135 synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee), but groupings of 3 tritos cycles (≈ 33 years minus 3 months) come close (≈ 434.044 anomalistic months), so eclipses are similar in these groupings.

Series members between 1801 and 2200
1803 Feb 06 (Saros 101)		1814 Jan 06 (Saros 102)		1824 Dec 06 (Saros 103)				1846 Oct 04 (Saros 105)
1857 Sep 04 (Saros 106)		1868 Aug 03 (Saros 107)		1879 Jul 03 (Saros 108)		1890 Jun 03 (Saros 109)		1901 May 03 (Saros 110)
1912 Apr 01 (Saros 111)		1923 Mar 03 (Saros 112)		1934 Jan 30 (Saros 113)		1944 Dec 29 (Saros 114)		1955 Nov 29 (Saros 115)
1966 Oct 29 (Saros 116)		1977 Sep 27 (Saros 117)		1988 Aug 27 (Saros 118)		1999 Jul 28 (Saros 119)		2010 Jun 26 (Saros 120)
2021 May 26 (Saros 121)		2032 Apr 25 (Saros 122)		2043 Mar 25 (Saros 123)		2054 Feb 22 (Saros 124)		2065 Jan 22 (Saros 125)
2075 Dec 22 (Saros 126)		2086 Nov 20 (Saros 127)		2097 Oct 21 (Saros 128)		2108 Sep 20 (Saros 129)		2119 Aug 20 (Saros 130)
2130 Jul 21 (Saros 131)		2141 Jun 19 (Saros 132)		2152 May 18 (Saros 133)		2163 Apr 19 (Saros 134)		2174 Mar 18 (Saros 135)
2185 Feb 14 (Saros 136)		2196 Jan 15 (Saros 137)

Inex series

This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.

Series members between 1801 and 2200
1807 Nov 15 (Saros 113)		1836 Oct 24 (Saros 114)		1865 Oct 04 (Saros 115)
1894 Sep 15 (Saros 116)		1923 Aug 26 (Saros 117)		1952 Aug 05 (Saros 118)
1981 Jul 17 (Saros 119)		2010 Jun 26 (Saros 120)		2039 Jun 06 (Saros 121)
2068 May 17 (Saros 122)		2097 Apr 26 (Saros 123)		2126 Apr 07 (Saros 124)
2155 Mar 19 (Saros 125)		2184 Feb 26 (Saros 126)

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).^[8] This lunar eclipse is related to two total solar eclipses of Solar Saros 127.

June 21, 2001	July 2, 2019

See also

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