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Penumbral Lunar Eclipse
August 6, 2009
Penumbral lunar eclipse Aug 6 2009 John Walker.gif
This subtle penumbral eclipse covered a fraction of the southern part of the moon as shown in this animation by John Walker, viewed from Lignières, Switzerland.
Lunar eclipse chart close-2009aug06.png
The moon grazed the Earth's southern penumbral shadow.
Series (and member) 148 (3rd)
Duration (hr:mn:sc)
Penumbral 3:09:47
Contacts (UTC)
P1 23:04:21 (Aug 5)
Greatest 0:39:11
P4 2:14:08
Lunar eclipse chart-2009aug06.png
The moon's hourly motion west to east through the constellation of Capricornus and the northern edge of the Earth's penumbral shadow

A penumbral lunar eclipse took place on August 6, 2009, the third of four lunar eclipses in 2009. The moon's small entry into the Earth's penumbral shadow will produce an extremely subtle dimming of the moon's southern edge, difficult to observe visually.

This is the third eclipse this season.

First eclipse this season: Penumbral Lunar Eclipse 7 Jul 2009

Second eclipse this season: Total Solar Eclipse 22 Jul 2009



The eclipse was completely visible over Africa and Europe and South America. It was seen rising over eastern North America and setting over Asia.



Related eclipsesEdit

Eclipses of 2009Edit

Lunar year cycles (354 days)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.

Half-Saros cycleEdit

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[1] This lunar eclipse is related to two partial solar eclipses of Solar Saros 155.

July 31, 2000 August 11, 2018

See alsoEdit



  1. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros

External linksEdit

  • John Walker (2009-08-07). "Penumbral Lunar Eclipse Imaged". Retrieved 2009-08-23. 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