Dynamics of the binary asteroid (379) Huenna
- Others:
- Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
- Observatoire de la Côte d'Azur (OCA) ; Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Description
We aim at studying the dynamical system of the asteroid (379) Huenna and its satellite, for which a discrepancy between its predicted and observed position was reported by DeMeo et al. (2011, Icarus, 212). We compile all the available images of the system acquired with large ground-based telescopes equipped with adaptive-optics fed camera. Based on these 40 observations covering 11 years, we determine the orbit of the satellite which is strongly affected by the gravitational influence of the Sun, as opposed to most satellites of large main-belt asteroids. Combining the mass of Huenna with a compilation of diameter estimates from the literature, we revise the estimate of its bulk density to 1491±249 kg ⋅m-3, consistent with its spectral classification as a P-type asteroid.
Abstract
International audience
Additional details
- URL
- https://hal-insu.archives-ouvertes.fr/insu-03656890
- URN
- urn:oai:HAL:insu-03656890v1
- Origin repository
- UNICA