Pluto's Atmospheric CH_4: Variations in time, space, and altitude

Details Pluto's Atmospheric CH_4: Variations in time, space, and altitude Pluto's Atmospheric CH_4: Variations in time, space, and altitude

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011noao.prop..301y&link_type=abstract

NOAO Proposal ID #2011A-0301

Physics

Scientific paper

We propose observations of gaseous methane on Pluto with GNIRS+AO at three specific sub-observer longitudes to (1) establish a baseline for temporal change, (2) search for spatial variability in gaseous methane, and (3) refine the vertical distribution of gaseous CH_4. The three longitudes, separated by roughly 120°, correspond to the longitudes of minimum CH_4 frost, maximum CH_4 frost, and maximum ratio of nearly pure to highly diluted CH_4 frost. These three terrains are expected to produce detectable differences in the gaseous CH_4. These observations will provide a temporal and spatial context in which to place the New Horizons encounter with Pluto in 2015.

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