Other
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.500..493h&link_type=abstract
In: Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference, 29 July - 2 August 2002, Berlin, Germany. Ed
Other
1
Minor Planets: Topography
Scientific paper
Knowledge of the size and shape of asteroids is of high importance to better understand their collisional evolution and internal structure. Presently, most of the largest asteroids (exception made of the few largest) are supposed to be rubble-piles of cohesionless aggregates, some having possibly equilibrium figures. Topographic models for asteroids can be derived from analysis of radar Doppler-imaging data or inversion of lightcurve data. Such models can be confronted to other independent observations such as stellar occultations, lightcurves, and mostly high resolution interferometric data from the Hubble Space Telesope (HST) Fine Guidance Sensor (FGS). We present the results obtained from the comparison to the HST/FGS data of (15) Eunomia, (44) Nysa, (216) Kleopatra, and (624) Hektor. We show that the HST/FGS data can provide valuable constraints on the topographic models of Kleopatra. Moreover, this procedure enables us to determine accurate and direct measurements of the linear size of the asteroids which cannot be retrieved from disk-integrated photometry alone.
Berthier Jerome
Cellino Alberto
Descamps Pascal
di Martino Mario
Hestroffer Daniel
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