Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...89..255m&link_type=abstract
Icarus (ISSN 0019-1035), vol. 89, Feb. 1991, p. 255-263.
Astronomy and Astrophysics
Astronomy
12
Absorption Spectra, Albedo, Infrared Photometry, Near Infrared Radiation, Planetary Composition, Pluto (Planet), Spectrophotometry, Light Curve, Nocturnal Variations, Space Observations (From Earth), Spectrum Analysis, Pluto, Spectrophotometry, Composition, Albedo, Lightcurves, Wavelengths, Spectra, Absorption, Depth, Methane, Atmosphere, Depletion, Brightness, Near-Infrared, Surface, Frost, Color, Optical Properties, Astronomy, Equatorial Regions, Earth-Based Observations, Data, Procedure
Scientific paper
The present time-resolved, 0.96-2.65-micron spectrophotometry for the Pluto-Charon system indicates night-to-night variations in the depths of the methane absorptions such that the bands' equivalent width is near minimum light. The interpretation of these data in terms of a depletion of methane in dark regions of the planet, relative to bright ones, is consistent with the Buie and Fink (1987) observations. The near-IR spectrum of Pluto seems to be dominated by surface frost. It is suggested that the dark equatorial regions of Pluto are redder than those of moderate albedo.
Lebofsky Larry A.
Marcialis Robert Louis
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