Mass and density of asteroids (4) Vesta and (11) Parthenope

B. Viateau; M. Rapaport

doi:10.1051/0004-6361:20010222

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Volume 370 / No 2 (May I 2001)

A&A, 370 2 (2001) 602-609

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Issue		A&A Volume 370, Number 2, May I 2001


Page(s)		602 - 609
Section		Celestial mechanics and astrometry
DOI		https://doi.org/10.1051/0004-6361:20010222
Published online		15 May 2001

A&A 370, 602-609 (2001)

Mass and density of asteroids (4) Vesta and (11) Parthenope

B. Viateau and M. Rapaport

Observatoire de Bordeaux, UMR 5804, CNRS, BP 89, 33270 Floirac, France

Corresponding author: M. Rapaport, rapaport@observ.u-bordeaux.fr

Received: 29 August 2000
Accepted: 7 February 2001

Abstract

As mentioned in a previous paper (Viateau & Rapaport [CITE]), the orbit of asteroid (17) Thetis is strongly perturbed by two large minor planets, (4) Vesta and (11) Parthenope. These strong gravitational perturbations enabled us to determine both the mass of Vesta and the mass of Parthenope. We also independently derived the mass of Vesta from observations of (197) Arete. The weighted mean of the two results gives the value $(1.306\pm 0.016) 10^{-10}$ $M_{\odot}$ (solar mass) for the mass of Vesta, and its derived mean density is ( $3.3\pm 0.5$ ) g/cm³. For (11) Parthenope, the values $(2.56\pm 0.07) 10^{-12}$ $M_{\odot}$ and $(2.3\pm 0.2)$ g/cm³ were obtained, respectively for its mass and its mean density.

Key words: minor planets, asteroids / astrometry / ephe merides

© ESO, 2001

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