Titania's opposition effect - Analysis of Voyager observations

Details Titania's opposition effect - Analysis of Voyager observations Titania's opposition effect - Analysis of Voyager observations

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9214911t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Dec. 30, 1987, p. 14911-14917.

Astronomy and Astrophysics

Astronomy

14

Astronomical Photometry, Titania, Voyager 2 Spacecraft, Albedo, Infrared Spectra, Regolith, Satellite Surfaces

Scientific paper

Voyager 2 obtained images of Titania over phase angles ranging from 0.8 to 150 deg and at sufficient resolution to investigate the photometric behavior of different surface units. The large, relatively narrow opposition surge detected from earth was confirmed and can be successfully modeled with Hapke's (1986) photometric theory. Opposition effects do not vary greatly between bright areas (craters and ejecta) and dark areas, but the brightness of the brighter areas decreases more slowly with increasing phase angle than that of the dark areas. Thus the fresher craters and their ejecta become less prominent in relation to the background as opposition is approached. This effect is best explained by a modest difference in single-scattering albedo.

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