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  Dawn mission's search for satellites of Ceres: Intact protoplanets don't have satellites

McFadden, L. A., Skillman, D. R., Memarsadeghi, N., Carsenty, U., Schröder, S., Li, J.-Y., et al. (2018). Dawn mission's search for satellites of Ceres: Intact protoplanets don't have satellites. Icarus, 316, 191-204. doi:10.1016/j.icarus.2018.02.017.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-120C-C Version Permalink: http://hdl.handle.net/21.11116/0000-0003-1210-6
Genre: Journal Article

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 Creators:
McFadden, Lucy A., Author
Skillman, David R., Author
Memarsadeghi, N., Author
Carsenty, U., Author
Schröder, S.E., Author
Li, J.-Y., Author
Mottola, S., Author
Mutchler, Max, Author
McLean, Brian, Author
Joy, S.P., Author
Polanskey, C.A., Author
Rayman, M.D., Author
Fieseler, P.D., Author
Sykes, M.V., Author
Nathues, Andreas1, Author              
Gutiérrez-Marques, P.1, Author
Keller, H.U., Author
Raymond, C.A., Author
Russell, C.T., Author
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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Free keywords: Dwarf planet Ceres Asteroids Satellites of asteroids Asteroid Ceres
 Abstract: Upon its approach to orbit the dwarf planet Ceres in early 2015, optical navigation and dedicated satellite search images were acquired with the Dawn mission's framing camera 2. A team of searchers individually processed and examined the images for evidence of objects moving with Ceres. Completeness of search with respect to the space searched was calculated as a function of distance to Ceres and found to be complete down to 15 Ceres radii (Ceres' mean radius is 470 km). Upper limits of detectable magnitude were determined for each observed set of images and an upper limit in size was calculated assuming for the putative objects, Ceres' geometric albedo of 0.11. Nothing was found associated with Ceres down to a radius of 12 m for the most sensitive search, and down to a radius of 323 m for the least sensitive search circumstances. Examination of the physical properties of the 41 largest and most massive main belt asteroids suggests that large asteroids without satellites are intact and their interiors have internal strength. This is consistent with results from the Dawn mission at both Vesta and Ceres. Ceres' volatile-rich composition also is a likely contributor to both the absence of satellites at Ceres and of Ceres meteorites at Earth. These results suggest that collisional disruption creating rubble pile structure is a necessary condition for formation of satellites around main belt asteroids.

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Language(s): eng - English
 Dates: 2018-12-2720182018
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.icarus.2018.02.017
 Degree: -

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Title: Icarus
Source Genre: Journal
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Affiliations:
Publ. Info: Amsterdam : Academic Press
Pages: - Volume / Issue: 316 Sequence Number: - Start / End Page: 191 - 204 Identifier: ISSN: 0019-1035
CoNE: https://pure.mpg.de/cone/journals/resource/954922645023