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July 2009 lunar eclipse

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July 2009 lunar eclipse
Penumbral eclipse
The Moon grazed the southern penumbral shadow of the Earth.
DateJuly 7, 2009
Gamma−1.4915
Magnitude−0.9116
Saros cycle110 (71 of 72)
Penumbral121 minutes, 29 seconds
Contacts (UTC)
P18:37:51
Greatest9:38:36
P410:39:20

A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Tuesday, July 7, 2009,[1] with an umbral magnitude of −0.9116. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into 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 only about 8 hours before apogee (on July 7, 2009, at 17:40 UTC), the Moon's apparent diameter was smaller.[2] This eclipse entered only the southernmost tip of the penumbral shadow and thus was predicted to be very difficult to observe visually.[3]

This eclipse was the second of four lunar eclipses in 2009, with the others occurring on February 9 (penumbral), August 6 (penumbral), and December 31 (partial).

Visibility

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The eclipse was completely visible over eastern Australia and western North and South America, seen rising over western Australia and setting over eastern North and South America.[4]


Hourly motion shown right to left
The Moon's hourly motion across the Earth's shadow in the constellation of Sagittarius.

Visibility map

Eclipse details

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Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[5]

July 7, 2009 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 0.15783
Umbral Magnitude −0.91159
Gamma −1.49158
Sun Right Ascension 07h06m54.1s
Sun Declination +22°32'55.2"
Sun Semi-Diameter 15'43.9"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 19h08m08.1s
Moon Declination -23°51'38.0"
Moon Semi-Diameter 14'42.6"
Moon Equatorial Horizontal Parallax 0°53'59.3"
ΔT 65.9 s

Eclipse season

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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. The first and last eclipse in this sequence is separated by one synodic month.[6][7][8]

Eclipse season of July–August 2009
July 7
Ascending node (full moon)
 July 22
Descending node (new moon)
 August 6
Ascending node (full moon)
Penumbral lunar eclipse
Lunar Saros 110		 Total solar eclipse
Solar Saros 136		 Penumbral lunar eclipse
Lunar Saros 148
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Eclipses in 2009

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Metonic

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Tzolkinex

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Half-Saros

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Tritos

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Lunar Saros 110

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Inex

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Triad

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Lunar eclipses of 2009–2013

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This eclipse is 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

Saros 110

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This eclipse is a member of Saros series 110. The previous event occurred on 27 June 1991. The next event is on 18 July 2027 which will end the series.

Half-Saros cycle

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A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[9] This lunar eclipse is related to two partial solar eclipses of Solar Saros 117.

July 1, 2000 July 13, 2018

See also

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Wikimedia Commons has media related to Lunar eclipse of 2009 July 7.

Notes

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  1. ^ "July 6–7, 2009 Penumbral Lunar Eclipse". timeanddate. Retrieved November 15, 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved November 15, 2024.
  3. ^ Sky&Telescope: "The moon skims through too little of the penumbra to be noticed even by the most intent observer." Archived February 2, 2009, at archive.today
  4. ^ "Penumbral Lunar Eclipse of 2009 Jul 07" (PDF). NASA. Retrieved November 15, 2024.
  5. ^ "Penumbral Lunar Eclipse of 2009 Jul 07". EclipseWise.com. Retrieved November 15, 2024.
  6. ^ (AFP) – 6 days ago. "AFP: Solar eclipse sparks tourism fever in China". Archived from the original on July 27, 2009. Retrieved July 22, 2009.{{cite web}}: CS1 maint: numeric names: authors list (link)
  7. ^ Wang, Hongjiang (July 22, 2009). "Scientists: China the best place to observe longest solar eclipse in 2,000 years_English_Xinhua". News.xinhuanet.com. Archived from the original on May 21, 2009. Retrieved July 22, 2009.
  8. ^ "Indian students on solar eclipse 'odyssey' to China – Yahoo! India News". In.news.yahoo.com. Archived from the original on July 29, 2009. Retrieved July 22, 2009.
  9. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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