Uv Rotational Light Curves for Pluto, and Charon's UV Spectrum

Details Uv Rotational Light Curves for Pluto, and Charon's UV Spectrum Uv Rotational Light Curves for Pluto, and Charon's UV Spectrum

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.2569t&link_type=abstract

HST Proposal ID #2569

Computer Science

Hst Proposal Id #2569

Scientific paper

We propose to use the unique capabilities of the HST to spatially resolve synchronously rotating Pluto from Charon for a variety of orbital phases and obtain low resolution (20-70A)spectral light curves from 3300A to below 2100A Our objectives include a search for longitudinally varying spectral features, a characterization of the longitudinally varying surface scattering properties, and a determination of the UV survey spectra from 3300A to 2400a of opposite faces of Charon near its elongations. Since significant changes are expected for Pluto's surface over HST's lifetime, and the present perihelion changes will not recur until 2233 Ad, data should be obtained now to serve as a baseline for later comparison or else the oportunity will be irretrievably lost. Only HST can observe below 3000A with the spatial resolution to separate Pluto from Charon and with the sensitivity to get usable signal to noise ratios at spectral resolutions of 20-70A.

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