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Astron. Astrophys. 330, 362-374 (1998)


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Ephemerides of the five major Uranian satellites by numerical integration

D.B. Taylor

Royal Greenwich Observatory, Madingley Road, Cambridge CB3 OEZ, UK

Received 25 July 1997 / Accepted 12 September 1997

Abstract

A catalogue is compiled of all available published and unpublished Earth-based observations of the satellites of Uranus. References are given to each of the published datasets. A brief survey of the observations is made concentrating on the different types of data and their quality. A numerical integration is fitted to observations in the time interval April 1977 to October 1995, which includes some of the best quality photographic data, the Voyager astrographic data, CCD data and meridian circle observations. The mass values found are expressed as the product of the universal gravitational constant times the mass of the body, in units of [FORMULA]. Values determined for the mass of Uranus of 5794054 [FORMULA] 163, the dynamical flattening J2 of Uranus 0.003365 [FORMULA] 0.000013 and for the mass of Miranda of 4.09 [FORMULA] 0.18 agree well with previously published values. The standard errors are formal errors from the least squares. The values obtained for the masses of the outer four satellites are found, from comparison with further solutions made, to be sensitive to the choice of weights used for the spacecraft data. These solutions are discussed in the light of the dynamics of the satellite system.

Key words: planets and satellites: Uranus – satellites of Uranus – ephemerides – astrometry

© European Southern Observatory (ESO) 1998

Online publication: January 8, 1998
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