Statistical Inversion of Gaia Photometry for Asteroid Spins and Shapes

Details Statistical Inversion of Gaia Photometry for Asteroid Spins and Shapes Statistical Inversion of Gaia Photometry for Asteroid Spins and Shapes

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.576..321t&link_type=abstract

"Proceedings of the Gaia Symposium "The Three-Dimensional Universe with Gaia" (ESA SP-576). Held at the Observatoire de Paris-Me

Physics

2

Gaia, Asteroid, Photometry, Physical Properties

Scientific paper

The Gaia satellite will provide us with a large amount of photometric asteroid data, sparse in time. We have used two methods to analyse simulated Gaia data to obtain the spin and shape solution for an asteroid-like object. A convex inversion method was used to obtain the spin state and convex shape for the target, and a spherical harmonics technique to obtain a set of non-convex shapes that reproduce the observed data. Our results show that the period of asteroids may be determined accurately using Gaia data alone, while the pole solution and the related convex shape are constrained to specific regions. Nonconvex features cannot uniquely be extracted from the data, but a set of non-convex solutions characterizes the limits where the correct shape lies.

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