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http://hdl.handle.net/20.500.12386/24805
Titolo: | Asteroid lightcurve inversion with Lommel-Seeliger ellipsoids | Autori: | Muinonen, Karri Wilkman, Olli CELLINO, Alberto Wang, Xiaobin Wang, Yibo |
Data pubblicazione: | 2015 | Rivista: | PLANETARY AND SPACE SCIENCE | Numero: | 118 | Da pagina:: | 227 | Abstract: | We derive initial rotation, shape, and scattering properties for asteroids from sparse and dense photometry based on the so-called Lommel-Seeliger ellipsoid (LS ellipsoid). Due to the analytical disk-integrated brightness, the LS ellipsoid allows for fast rotation-period, pole-orientation, and shape analyses, as well as efficient Markov-chain Monte Carlo solutions (MCMC). We apply the methods to simulated sparse Gaia photometry, as well as to ground-based photometry composed of dense lightcurves. For a specific Gaia simulation, we make use of a numerical reflection coefficient developed for particulate surfaces, and utilize the LS ellipsoid in the inversion of the simulated data. We conclude that, in a majority of cases, initial LS ellipsoid retrieval of the parameters is satisfactory. Finally, we formulate a single-scattering phase function that, for a spherical asteroid, results in the H ,G<SUB>1</SUB> ,G<SUB>2</SUB> photometric phase function. <P /> | Acknowledgments: | Acknowledgments Constructive comments from the anonymous referees helped improve the original paper. Research supported, in part, by the Academy of Finland (Project 1257966). | URI: | http://hdl.handle.net/20.500.12386/24805 | URL: | https://www.sciencedirect.com/science/article/pii/S0032063315002548?via%3Dihub | ISSN: | 0032-0633 | DOI: | 10.1016/j.pss.2015.09.005 | Bibcode ADS: | 2015P&SS..118..227M | Fulltext: | open |
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