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Volumes and bulk densities of forty asteroids from ADAM shape modeling

J. HanušUniversité Côte d'Azur, OCA, CNRS, Lagrange, FranceM. ViikinkoskiDepartment of Mathematics, Tampere University of Technology, PO Box 553, 33101 Tampere, FinlandFranck MarchisSETI Institute, Carl Sagan Center, 189 Bernado Avenue, Mountain View, CA 94043, USAJosef ĎurechAstronomical Institute, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague, Czech RepublicM. KaasalainenDepartment of Mathematics, Tampere University of Technology, PO Box 553, 33101 Tampere, FinlandMarco DelbóUniversité Côte d'Azur, OCA, CNRS, Lagrange, FranceD. HeraldEric FrappaTsutomu HayamizuS. KerrS. PrestonB. TimersonDavid DunhamJohn Talbot

2017en

ABI

Annotatsiya

Context. Disk-integrated photometric data of asteroids do not contain accurate information on shape details or size scale. Additional data such as disk-resolved images or stellar occultation measurements further constrain asteroid shapes and allow size estimates. Aims. We aim to use all the available disk-resolved images of approximately forty asteroids obtained by the Near-InfraRed Camera (Nirc2) mounted on the W.M. Keck II telescope together with the disk-integrated photometry and stellar occultation measurements to determine their volumes. We can then use the volume, in combination with the known mass, to derive the bulk density. Methods. We downloaded and processed all the asteroid disk-resolved images obtained by the Nirc2 that are available in the Keck Observatory Archive (KOA). We combined optical disk-integrated data and stellar occultation profiles with the disk-resolved images and use the All-Data Asteroid Modeling (ADAM) algorithm for the shape and size modeling. Our approach provides constraints on the expected uncertainty in the volume and size as well.

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DOI: 10.1051/0004-6361/201629956

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