First direct measurements of the diameters of the large satellites of Uranus and Neptune

Details First direct measurements of the diameters of the large satellites of Uranus and Neptune First direct measurements of the diameters of the large satellites of Uranus and Neptune

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...161l..12b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 161, no. 1, June 1986, p. L12, L13.

Astronomy and Astrophysics

Astrophysics

4

Diameters, Interferometry, Speckle Patterns, Triton, Uranus Satellites, Ariel, Oberon, Titania, Umbriel, Voyager 2 Spacecraft

Scientific paper

The authors report the first direct measurements of the diameter of the satellites of Uranus, Ariel, Umbriel, Titania and Oberon, and of the satellite of Neptune, Triton, utilizing the techniques of speckle interferometry at the CFH Telescope. In the case of Uranus, these direct measurements are discussed with respect to the preliminary values from Voyager 2. For Triton, the authors have measured a diameter markedly smaller than indirect values, 2074 < D < 2500 km depending upon the assumed limb darkening; consequently the Triton albedo is higher: 1.0 > pv > 0.7.

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