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Titre du document / Document title

The Shape of Gaspra : Galileo's observations of 951 Gaspra

Auteur(s) / Author(s)

THOMAS P. C. (1) ; VEVERKA J. (1) ; SIMONELLI D. (1) ; HELFENSTEIN P. (1) ; CARCICH B. (1) ; BELTON M. J. S. ; DAVIES M. E. ; CHAPMAN C. ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Cornell univ., Ithaca NY, ETATS-UNIS

Résumé / Abstract

Images of Gaspra obtained during the October 1991 Galileo flyby have been used to derive a shape model of the asteroid. Gaspra is a highly irregular object with principal diameters of 18.2, 10.5, and 8.9 km and a mean radius of 6.1 km. Assuming that the mass distribution is homogeneous, the rotation axis (RA = 9.5°, Dec = +26.7°) is aligned with the maximum moment of inertia given the estimated uncertainties in the model and pole. The mean radius, axial ratios, and pole orientation derived from the Galileo data agree closely with values inferred from groundbased observations. Gaspra's shape is defined in part by extensive flat areas and large, shallow concavities up to 10 km wide

Revue / Journal Title

Icarus    ISSN  0019-1035   CODEN ICRSA5 

Source / Source

1994, vol. 107, no1, pp. 23-36 (30 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Amsterdam, PAYS-BAS  (1962) (Revue)

Mots-clés anglais / English Keywords

Asteroids

;

Size

;

Shape

;

Rotation

;

Topography

;

Images

;

Mots-clés français / French Keywords

Astéroïde

;

Taille

;

Forme

;

Rotation

;

Topographie

;

Image

;

Localisation / Location

INIST-CNRS, Cote INIST : 10196, 35400004943347.0030

Nº notice refdoc (ud4) : 3984962



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