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Dione passing in front of Titan Dione passed in front of Titan on 12 March 2010 as Cassini snapped photos. Late in 2009, Cassini planners started commanding the spacecraft to take these "mutual event" movies not through a clear filter but instead through red, green, and blue filters sequentially; the raw data exists to produce an animation of Dione passing across Titan in color. NASA / JPL-Caltech / SSI / color composite by Emily Lakdawalla