August 2009 lunar eclipse
| Penumbral eclipse | |||||||||
 This subtle penumbral eclipse covered the southern part of the Moon as shown in this animation by John Walker, viewed from Lignières, Switzerland. | |||||||||
| Date | August 6, 2009 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Gamma | 1.3572 | ||||||||
| Magnitude | −0.6642 | ||||||||
| Saros cycle | 148 (3 of 71) | ||||||||
| Penumbral | 189 minutes, 47 seconds | ||||||||
| |||||||||
A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Thursday, August 6, 2009,[1] with an umbral magnitude of −0.6642. 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 about 2.1 days after apogee (on August 3, 2009, at 22:40 UTC), the Moon's apparent diameter was smaller.[2]
This eclipse was the third of four lunar eclipses in 2009, with the others occurring on February 9 (penumbral), July 7 (penumbral), and December 31 (partial).
Visibility
[edit]The eclipse was completely visible over South America, Africa, and Europe, seen rising over much of North America and setting over central and south Asia.[3]
|
 Hourly motion shown right to left |
 The Moon's hourly motion across the Earth's shadow in the constellation of Capricornus. |
 Visibility map | ||
Gallery
[edit]-
From France, 23:31 UTC
.jpg)
Eclipse details
[edit]Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 0.40379 |
| Umbral Magnitude | −0.66417 |
| Gamma | 1.35724 |
| Sun Right Ascension | 09h04m42.0s |
| Sun Declination | +16°42'38.9" |
| Sun Semi-Diameter | 15'46.1" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 21h02m46.3s |
| Moon Declination | -15°34'32.9" |
| Moon Semi-Diameter | 14'45.9" |
| Moon Equatorial Horizontal Parallax | 0°54'11.4" |
| ΔT | 66.0 s |
Eclipse season
[edit]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.[5][6][7]
| 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 |
Related eclipses
[edit]Eclipses in 2009
[edit]- 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
[edit]- Preceded by: Lunar eclipse of October 17, 2005
- Followed by: Lunar eclipse of May 25, 2013
Tzolkinex
[edit]- Preceded by: Lunar eclipse of June 24, 2002
- Followed by: Lunar eclipse of September 16, 2016
Half-Saros
[edit]- Preceded by: Solar eclipse of July 31, 2000
- Followed by: Solar eclipse of August 11, 2018
Tritos
[edit]- Preceded by: Lunar eclipse of September 6, 1998
- Followed by: Lunar eclipse of July 5, 2020
Lunar Saros 148
[edit]- Preceded by: Lunar eclipse of July 26, 1991
- Followed by: Lunar eclipse of August 17, 2027
Inex
[edit]- Preceded by: Lunar eclipse of August 26, 1980
- Followed by: Lunar eclipse of July 16, 2038
Triad
[edit]- Preceded by: Lunar eclipse of October 6, 1922
- Followed by: Lunar eclipse of June 6, 2096
Lunar eclipses of 2006–2009
[edit]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 2006–2009 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||||
| Saros # and photo |
Date Viewing |
Type Chart |
Gamma | Saros # and photo |
Date Viewing |
Type Chart |
Gamma | |
113.jpg)
|
2006 Mar 14
|
penumbral
|
1.0211 | 118
|
2006 Sep 7
|
partial
|
−0.9262 | |
123
|
2007 Mar 03
|
total
|
0.3175 | 128
|
2007 Aug 28
|
total
|
−0.2146 | |
133
|
2008 Feb 21
|
total
|
−0.3992 | 138
|
2008 Aug 16
|
partial
|
0.5646 | |
143
|
2009 Feb 09
|
penumbral
|
−1.0640 | 148
|
2009 Aug 06
|
penumbral
|
1.3572 | |
| Last set | 2005 Apr 24 | Last set | 2005 Oct 17 | |||||
| Next set | 2009 Dec 31 | Next set | 2009 Jul 07 | |||||
Half-Saros cycle
[edit]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 partial solar eclipses of Solar Saros 155.
| July 31, 2000 | August 11, 2018 |
|---|---|
|
|
See also
[edit]Notes
[edit]- ^ "August 5–6, 2009 Penumbral Lunar Eclipse". timeanddate. Retrieved 15 November 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 15 November 2024.
- ^ "Penumbral Lunar Eclipse of 2009 Aug 06" (PDF). NASA. Retrieved 15 November 2024.
- ^ "Penumbral Lunar Eclipse of 2009 Aug 06". EclipseWise.com. Retrieved 15 November 2024.
- ^ (AFP) – 6 days ago. "AFP: Solar eclipse sparks tourism fever in China". Archived from the original on 27 July 2009. Retrieved 22 July 2009.
{{cite web}}: CS1 maint: numeric names: authors list (link) - ^ Wang, Hongjiang (22 July 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 21 May 2009. Retrieved 22 July 2009.
- ^ "Indian students on solar eclipse 'odyssey' to China – Yahoo! India News". In.news.yahoo.com. Archived from the original on 29 July 2009. Retrieved 22 July 2009.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit]- John Walker (7 August 2009). "Penumbral Lunar Eclipse Imaged". Retrieved 23 August 2009. The eclipse was captured with two digital photographs and combined into one gif file.
- 2009 Aug 06 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC
_(cropped).jpg)
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