July 2009 lunar eclipse

{{Infobox lunar eclipse

| type = penumbral

| image = Lunar eclipse chart close-2009jul07.png

| caption = The Moon grazed the southern penumbral shadow of the Earth.

| date = July 7, 2009

| gamma = −1.4915

| magnitude = −0.9116

| saros_ser = 110

| saros_no = 71 of 72

| totality =

| partiality =

| penumbral = 121 minutes, 29 seconds

| p1 = 8:37:51

| u1 =

| u2 =

| greatest = 9:38:36

| u3 =

| u4 =

| p4 = 10:39:20

| previous = February 2009

| next = August 2009

}}

A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Tuesday, July 7, 2009,{{cite web|title=July 6–7, 2009 Penumbral Lunar Eclipse|url=https://www.timeanddate.com/eclipse/lunar/2009-july-7|publisher=timeanddate|access-date=15 November 2024}} 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.{{cite web|title=Moon Distances for London, United Kingdom, England|url=https://www.timeanddate.com/astronomy/moon/distance.html?year=2009&n=136|publisher=timeanddate|access-date=15 November 2024}} This eclipse entered only the southernmost tip of the penumbral shadow and thus was predicted to be very difficult to observe visually.[http://www.skyandtelescope.com/observing/objects/eclipses/36789564.html Sky&Telescope: "The moon skims through too little of the penumbra to be noticed even by the most intent observer."] {{webarchive|url=https://archive.today/20090202042337/http://www.skyandtelescope.com/observing/objects/eclipses/36789564.html |date=February 2, 2009 }}

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

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.{{cite web|title=Penumbral Lunar Eclipse of 2009 Jul 07|url=https://eclipse.gsfc.nasa.gov/LEplot/LEplot2001/LE2009Jul07N.pdf|publisher=NASA|access-date=15 November 2024}}

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Hourly motion shown right to left

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The Moon's hourly motion across the Earth's shadow in the constellation of Sagittarius.

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Visibility map

Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.{{cite web|title=Penumbral Lunar Eclipse of 2009 Jul 07|url=https://eclipsewise.com/lunar/LEprime/2001-2100/LE2009Jul07Nprime.html|publisher=EclipseWise.com|access-date=15 November 2024}}

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|+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

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.{{cite web|author=(AFP) – 6 days ago |url=https://www.google.com/hostednews/afp/article/ALeqM5ihVF0P6egD6R8AyynWO_Rm8ZZjKQ |archive-url=https://web.archive.org/web/20090727014548/http://www.google.com/hostednews/afp/article/ALeqM5ihVF0P6egD6R8AyynWO_Rm8ZZjKQ |url-status=dead |archive-date=July 27, 2009 |title=AFP: Solar eclipse sparks tourism fever in China |access-date=2009-07-22}}{{cite web|url=http://news.xinhuanet.com/english/2009-05/19/content_11402627.htm |archive-url=https://web.archive.org/web/20090521173957/http://news.xinhuanet.com/english/2009-05/19/content_11402627.htm |url-status=dead |archive-date=2009-05-21 |title=Scientists: China the best place to observe longest solar eclipse in 2,000 years_English_Xinhua |publisher=News.xinhuanet.com |date=2009-07-22 |access-date=2009-07-22 |last=Wang |first=Hongjiang }}{{cite web|url=http://in.news.yahoo.com/43/20090717/860/ttc-indian-students-on-solar-eclipse-ody.html |title=Indian students on solar eclipse 'odyssey' to China – Yahoo! India News |publisher=In.news.yahoo.com |access-date=2009-07-22 |url-status=dead |archive-url=https://web.archive.org/web/20090729071808/http://in.news.yahoo.com/43/20090717/860/ttc-indian-students-on-solar-eclipse-ody.html |archive-date=2009-07-29 }}

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|+ Eclipse season of July–August 2009

! July 7
Ascending node (full moon)
!! July 22
Descending node (new moon)
!! August 6
Ascending node (full moon)

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| Penumbral lunar eclipse
Lunar Saros 110

Total solar eclipse
Solar Saros 136

Penumbral lunar eclipse
Lunar Saros 148

Related eclipses

= Eclipses in 2009 =

An annular solar eclipse on January 26.
A penumbral lunar eclipse on February 9.
A penumbral lunar eclipse on July 7.
A total solar eclipse on July 22.
A penumbral lunar eclipse on August 6.
A partial lunar eclipse on December 31.

= Metonic =

Followed by: Lunar eclipse of April 25, 2013

= Tzolkinex =

Preceded by: Lunar eclipse of May 26, 2002
Followed by: Lunar eclipse of August 18, 2016

= Half-Saros =

Preceded by: Solar eclipse of July 1, 2000
Followed by: Solar eclipse of July 13, 2018

= Tritos =

Preceded by: Lunar eclipse of August 8, 1998
Followed by: Lunar eclipse of June 5, 2020

= Lunar Saros 110 =

Preceded by: Lunar eclipse of June 27, 1991
Followed by: Lunar eclipse of July 18, 2027

= Inex =

Preceded by: Lunar eclipse of July 27, 1980
Followed by: Lunar eclipse of June 17, 2038

= Triad =

Followed by: Lunar eclipse of May 7, 2096

= Lunar eclipses of 2009–2013 =

= Saros 110 =

= 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 partial solar eclipses of Solar Saros 117.

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!July 1, 2000

!July 13, 2018

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