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Phase and Libration Coverage

This plot shows the libration coverage of the processed ROLO dataset, with phase indicated by color. Although these data represent 4.6 years of the full ROLO archive, not quite 1/4 of the 18.6 year libration repeat cycle, the libration space is substantially filled. However, if phase angle is restricted to a narrow range then libration coverage is sparse.

For an animation of a lunation cycle showing the optical librations through the phases, check out the Astronomy Picture of the day for 08 Nov. 1999[http://http://antwrp.gsfc.nasa.gov/apod/ap991108.html].

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