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The Mass of Dwarf Planet Eris

Brown, Michael E. and Schaller, Emily L. (2007) The Mass of Dwarf Planet Eris. Science, 316 (5831). p. 1585. ISSN 0036-8075. doi:10.1126/science.1139415.

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The discovery of dwarf planet Eris was followed shortly by the discovery of its satellite, Dysnomia, but the satellite orbit, and thus the system mass, was not known. New observations with the Keck Observatory and the Hubble Space Telescopes show that Dysnomia has a circular orbit with a radius of 37,350 ± 140 (1-σ) kilometers and a 15.774 ± 0.002 day orbital period around Eris. These orbital parameters agree with expectations for a satellite formed out of the orbiting debris left from a giant impact. The mass of Eris from these orbital parameters is 1.67 × 10^(22) ± 0.02 × 10^(22) kilograms, or 1.27 ± 0.02 that of Pluto.

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Brown, Michael E.0000-0002-8255-0545
Additional Information:© 2007 American Association for the Advancement of Science. Received 29 December 2006; accepted 14 March 2007. This research is supported by a Presidential Early Career Award to M.E.B. In addition, E.L.S. is supported by a NASA graduate student research fellowship. We thank J. Aycock, R. Campbell, A. Conrad, K. Grace, J. Lyke, C. Melcher, C. Sorenson, M. van Dam, and C. Wilburn at Keck Observatory, without whom these complicated LGS AO observations would not have been possible.
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Presidential Early Career AwardUNSPECIFIED
NASA Graduate Student Research FellowshipUNSPECIFIED
Issue or Number:5831
Record Number:CaltechAUTHORS:20121001-135149660
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:34598
Deposited By: Tony Diaz
Deposited On:01 Oct 2012 21:47
Last Modified:09 Nov 2021 23:09

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