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Issue A&A
Volume 395, Number 2, November IV 2002
Page(s) L17 - L19
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20021444



A&A 395, L17-L19 (2002)
DOI: 10.1051/0004-6361:20021444

Letter

Motion of the asteroid (13206) 1997GC22 and the mass of (16) Psyche

M. Kuzmanoski and A. Kovacevic

Department of Astronomy, Faculty of Mathematics, University of Belgrade, Studentski trg 16, 11000 Belgrade, Yugoslavia

(Received 24 June 2002 / Accepted 2 October 2002 )

Abstract
From the perturbing effects of the asteroid (16) Psyche on the motion of the asteroid (13206) 1997GC22 the mass of (16) Psyche is determined. A close approach between these two asteroids at $0.00376\, {\rm AU}$, and at a relative velocity of  $ 0.74 \, {\rm km\, s^{-1}}$ , occured in July 1974. The value of $(3.38\pm 0.28)\, 10^{-11}~{M_{\odot}}$ has been found for the mass of (16) Psyche, which yields a density of $(6.98\pm0.58)\,{\rm g\,cm^{-3}}$. These values are very different from those obtained by other authors, but the mass is much closer to the value based on the IRAS estimation of (16) Psyche diameter and its M-type taxonomical classification.


Key words: celestial mechanics -- minor planets, asteroids -- methods: numerical

Offprint request: M. Kuzmanoski, mike@matf.bg.ac.yu




© ESO 2002


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