Albedo dichotomy of RHEA - Hapke analysis of Voyager photometry

Details Albedo dichotomy of RHEA - Hapke analysis of Voyager photometry Albedo dichotomy of RHEA - Hapke analysis of Voyager photometry

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...82..336v&link_type=abstract

Icarus (ISSN 0019-1035), vol. 82, Dec. 1989, p. 336-353.

Astronomy and Astrophysics

Astronomy

31

Albedo, Astronomical Photometry, Rhea (Astronomy), Satellite Observation, Brightness Distribution, Light Curve, Light Scattering, Surface Roughness, Voyager 2 Spacecraft

Scientific paper

The Hapke (1986) model has been well fitted to both full-disk and disk-resolved Voyager observations. The low phase angle data indicate a substantial opposition effect, and the Hapke analysis results show that while the regolith compaction parameter for Rhea is definitely larger than for Titania, it is comparable to that of the moon. Photometric differences other than albedo are noted between the leading and trailing hemispheres of the satellite. The albedo map of Rhea presented reproduces the observed lightcurve and demonstrates that no terrain or feature in the trailing hemisphere is as bright as any in the leading hemisphere. A quasi-circular low albedo region near the antiapex of motion is discovered.

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