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Penumbral Lunar Eclipse on July 7, 2009

A penumbral lunar eclipse, which is the second of four lunar eclipses in 2009, will occur on July 7, 2009. It is a minor eclipse with a penumbral magnitude of 0.1562. The eclipse is predicted to last for about two hours.

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The penumbral lunar eclipse that occurs on July 7, 2009, will not be visible to the naked eye.

Will the Eclipse be Visible?

The July 7 lunar eclipse will be completely invisible to the naked eye but the moon will be above the horizon from most of Canada. According to NASA, this penumbral eclipse is only of academic interest since the magnitude is just 0.156 at the point of maximum eclipse. Therefore there is only a little chance for seeing any of the eclipse’s dimming effect.

When Will the Eclipse Occur?

The first penumbral contact is predicted to occur at 08:37:51 Universal Time (UT). The ecliptic conjunction will occur at 09:21:25.1 UT and the point of greatest eclipse occurs at about 09:38:37.9 UT. The eclipse is predicted to end at about 10:39:23 UT.

Where Will the Eclipse Be?

The moon will be situated in the constellation Sagittarius when the eclipse occurs. It will be above the horizon throughout the event in North America west of the Great Lakes, including Hawaii and many parts of Alaska (Harrington, 1997). The moon will also be high in the sky over New Zealand and eastern Australia. 

Eclipses in 2009

The July 7 eclipse is not the only eclipse in 2009. The list of eclipses for 2009 includes:

timeanddate.com will provide updates about more eclipses closer to the time of their occurrence.

Useful tools

The World Clock’s Time Zone Converter helps eclipse enthusiasts and travelers discover when the eclipse will occur in cities’ local time. Links on the results page to the chosen city will allow people find out weather information for the eclipse’s date. More useful tools are found at the bottom of this page.

* An umbra refers to the fully shaded inner region of a shadow, especially the area on the earth or the moon experiencing totality in an eclipse.

Note: Universal Time (UT) is a timescale based on the earth’s rotation. UT is about 0.23 seconds ahead of Coordinated Universal Time (UTC) during most of July. Eclipse information courtesy of Fred Espenak, NASA/Goddard Space Flight Center, and P. Harrington, author of Eclipse! The What, Where, When, Why & How Guide to Watching Solar and Lunar Eclipses.

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