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Callisto eclipses Io, 2009 May16

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Uploaded on May 17, 2009

Every 6 years there is a period of several months where it is possible for a moon of Jupiter to cast its shadow onto another moon (eclipse) or pass in front of another moon (occultation). The latest period started in May 2009.

This video records an eclipse of Io by the shadow of Callisto. Io is the moon closest to Jupiter on the left. The shadow is being cast by the moon Callisto, which is the next moon out to the left. [The third moon is Ganymede.] The time is shown at the bottom of the image. The eclipse extends from about 18 39m to 18 48m, with the maximum being at 18h 44m. The eclipse was a penumbral eclipse, which meant that Io merely faded in brightness - it does not disappear completely from view.

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