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Summary
Canon 5D MKII + EF 70-200 f4 L IS + Extender x1.4 II (f5.6 1/750)
A partial lunar eclipse occurs when only a portion of the Moon enters the umbra. When the Moon travels completely into the Earth’s umbra, one observes a total lunar eclipse. The Moon’s speed through the shadow is about one kilometer per second (2,300 mph), and totality may last up to nearly 107 minutes. Nevertheless, the total time between the Moon’s first and last contact with the shadow is much longer, and could last up to 3.8 hours.[1] The relative distance of the Moon from the Earth at the time of an eclipse can affect the eclipse’s duration. In particular, when the Moon is near its apogee, the farthest point from the Earth in its orbit, its orbital speed is the slowest. The diameter of the umbra does not decrease much with distance. Thus, a totally-eclipsed Moon occurring near apogee will lengthen the duration of totality.
Copyright status:
Attribution 2.0 Generic, http://creativecommons.org/licenses/by/2.0/deed.en
Source:
http://www.flickr.com/photos/endogamia/4233336572/
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment |
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| current | 21:05, 17 April 2010 |  | 500 × 333 (38 KB) | Grace Lackey | Canon 5D MKII + EF 70-200 f4 L IS + Extender x1.4 II (f5.6 1/750) A partial lunar eclipse occurs when only a portion of the Moon enters the umbra. When the Moon travels completely into the Earth’s umbra, one observes a total lunar eclipse. The Moon’s |
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