The Shape of Io from Galileo Limb Measurements

P. C. Thomas; M. E. Davies; T. R. Colvin; J. Oberst; P. Schuster; G. Neukum; M. H. Carr; A. McEwen; G. Schubert; M. J.S. Belton

doi:10.1006/icar.1998.5987

The Shape of Io from Galileo Limb Measurements

P. C. Thomas, M. E. Davies, T. R. Colvin, J. Oberst, P. Schuster, G. Neukum, M. H. Carr, A. McEwen, G. Schubert, M. J.S. Belton

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Abstract

Galileo CCD images of the limb of Io provide improved data for determining the shape of this synchronously rotating satellite. The best ellipsoidal fit is within 0.3 km of the best equilibrium fit of 1829.7, 1819.2, 1815.8 km. The shape is consistent with substantial mass concentration in a core and with gravity measurements from tracking of the Galileo spacecraft. The surface of Io is largely plains and isolated peaks, with little long-wavelength topography over 1 km in amplitude.

Original language	English (US)
Pages (from-to)	175-180
Number of pages	6
Journal	Icarus
Volume	135
Issue number	1
DOIs	https://doi.org/10.1006/icar.1998.5987
State	Published - Sep 1998

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1006/icar.1998.5987

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title = "The Shape of Io from Galileo Limb Measurements",

abstract = "Galileo CCD images of the limb of Io provide improved data for determining the shape of this synchronously rotating satellite. The best ellipsoidal fit is within 0.3 km of the best equilibrium fit of 1829.7, 1819.2, 1815.8 km. The shape is consistent with substantial mass concentration in a core and with gravity measurements from tracking of the Galileo spacecraft. The surface of Io is largely plains and isolated peaks, with little long-wavelength topography over 1 km in amplitude.",

author = "Thomas, {P. C.} and Davies, {M. E.} and Colvin, {T. R.} and J. Oberst and P. Schuster and G. Neukum and Carr, {M. H.} and A. McEwen and G. Schubert and Belton, {M. J.S.}",

note = "Funding Information: M. Ryan, M. Roth, B. Carcich, and R. Kline provided technical help; two anonymous reviewers helped the presentation. Supported in part by the Galileo project and NASA Grant NAG5–3627.",

year = "1998",

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language = "English (US)",

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T1 - The Shape of Io from Galileo Limb Measurements

AU - Thomas, P. C.

AU - Davies, M. E.

AU - Colvin, T. R.

AU - Oberst, J.

AU - Schuster, P.

AU - Neukum, G.

AU - Carr, M. H.

AU - McEwen, A.

AU - Schubert, G.

AU - Belton, M. J.S.

N1 - Funding Information: M. Ryan, M. Roth, B. Carcich, and R. Kline provided technical help; two anonymous reviewers helped the presentation. Supported in part by the Galileo project and NASA Grant NAG5–3627.

PY - 1998/9

Y1 - 1998/9

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AB - Galileo CCD images of the limb of Io provide improved data for determining the shape of this synchronously rotating satellite. The best ellipsoidal fit is within 0.3 km of the best equilibrium fit of 1829.7, 1819.2, 1815.8 km. The shape is consistent with substantial mass concentration in a core and with gravity measurements from tracking of the Galileo spacecraft. The surface of Io is largely plains and isolated peaks, with little long-wavelength topography over 1 km in amplitude.

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The Shape of Io from Galileo Limb Measurements

Abstract

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