Sizes, shapes, and albedos of the inner satellites of Neptune

Details Sizes, shapes, and albedos of the inner satellites of Neptune Sizes, shapes, and albedos of the inner satellites of Neptune

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icar..162..400k&link_type=abstract

Icarus, Volume 162, Issue 2, p. 400-407.

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11

Scientific paper

Based on 87 resolved Voyager images of the five innermost satellites of Neptune, their shapes were measured and fit by tri-axial ellipsoids with the semi-axes of 48 × 30 × 26 km for Naiad, 54 × 50 × 26 km for Thalassa, 90 × 74 × 64 km for Despina, 102 × 92 × 72 km for Galatea, and 108 × 102 × 84 km for Larissa. Thomas and Veverka published a similar shape for Larissa (104 × 89 km, J. Geophys. Res. 96, 19261-19268, 1991). The other satellites had no published shapes. Using Voyager photometry of the six inner satellites by the same authors and the revised sizes, including the published size of Proteus, the reflectivity within this inner system was found to vary by about 30%. Geometric albedos in the visible are estimated between 0.07 for Naiad and 0.10 for Proteus. The rotational lightcurves of these satellites seem to be due to satellite shapes.

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