Why is Pluto bright? Implications of the albedo and lightcurve behavior of Pluto

Details Why is Pluto bright? Implications of the albedo and lightcurve behavior of Pluto Why is Pluto bright? Implications of the albedo and lightcurve behavior of Pluto

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...75..485s&link_type=abstract

Icarus (ISSN 0019-1035), vol. 75, Sept. 1988, p. 485-498.

Astronomy and Astrophysics

Astronomy

40

Charged Particles, Charon, Light Curve, Methane, Planetary Surfaces, Pluto Atmosphere, Infrared Astronomy Satellite, Satellite Surfaces

Scientific paper

Several mechanisms accounting for Pluto's high geometric albedo in the presence of CH4 and various radiations are investigated, in light of the hypothesis that the planet must replenish its surface with clean volatiles on a time-scale of less than 20,000 years. Pluto's high albedo is explained by a CH4 snow cover created by orbital atmospheric sublimation and freeze-out cycles. As a result of the 250-year atmospheric regeneration time-scale, large surface CH4 crystals will be deprived of sufficient time for growth; it is predicted that the albedo decline will reverse following a 7-17 year phase lag after perihelion.

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