Computer Science
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10423h&link_type=abstract
HST Proposal ID #10423
Computer Science
Hst Proposal Id #10423 Solar System
Scientific paper
Neptune's disk-integrated reflectivity flux has risen steadily over the past decade, and has now reached unprecedented levels. Near-IR images of Neptune made with the Keck AO system in late 2003 show that the amount and distribution of cloud activity is also unprecedented. In 1994, HST images suggested that increased cloud activity on the disk was correlated with the formation of a new northern Great Dark Spot {GDS} and the dissipation of the Voyager GDS. Great Dark Spots are only detectable with HST blue-wavelength images. In Cycle 12, no ACS or WFPC2 images of Neptune were obtained, and exactly two STIS Neptune images were obtained {broad-band only}. The observations proposed here will reveal the visible-wavelength component of the banded structure, and also show whether the unusual activity is linked to the evolution of one or more Great Dark Spots.
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