Abstract
Using adaptive optics on the W. M. Keck II telescope, we imaged Titan several times during 1999 to 2001 in narrowband near-infrared filters selected to probe Titan's stratosphere and upper troposphere. We observed a bright feature around the south pole, possibly a collar of haze or clouds. Further, we find that solar phase angle explains most of the observed east–west brightness asymmetry of Titan's atmosphere, although the data do not preclude the presence of a “morning fog” effect at small solar phase angle.
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