Pál, A. and Kiss, C. and Müller, T. G. and Santos-Sanz, P. and Vilenius, E. and Szalai, N. and Mommert, M. and Lellouch, E. and Rengel, M. and Hartogh, P. and Protopapa, S. and Stansberry, J. and Ortiz, J.-L. and Duffard, R. and Thirouin, A. and Henry, F. and Delsanti, A. (2012) “TNOs are Cool”: A survey of the trans-Neptunian region. VII. Size and surface characteristics of (90377) Sedna and 2010 EK139. Astronomy and Astrophysics, 541, L6. DOI: 10.1051/0004-6361/201218874. ISSN 0004-6361.
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Official URL: http://dx.doi.org/10.1051/0004-6361/201218874
We present estimates of the basic physical properties (size and albedo) of (90377) Sedna, a prominent member of the detached trans-Neptunian object population and the recently discovered scattered disk object 2010 EK139, based on the recent observations acquired with the Herschel Space Observatory, within the "TNOs are Cool!" key programme. Our modeling of the thermal measurements shows that both objects have larger albedos and smaller sizes than the previous expectations, thus their surfaces might be covered by ices in a significantly larger fraction. The derived diameter of Sedna and 2010 EK139 are 995 ± 80 km and 470+35-10 km, while the respective geometric albedos are pV = 0.32 ± 0.06 and 0.25+0.02-0.05. These estimates are based on thermophysical model techniques.
|Title:||“TNOs are Cool”: A survey of the trans-Neptunian region. VII. Size and surface characteristics of (90377) Sedna and 2010 EK139|
|Journal or Publication Title:||Astronomy and Astrophysics|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Keywords:||Kuiper belt objects: individual: (90377) Sedna, radiation mechanisms: thermal, techniques: photometric, Kuiper belt objects: individual: 2010 EK139|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Space (old)|
|HGF - Program Themes:||W EW - Erforschung des Weltraums|
|DLR - Research area:||Space|
|DLR - Program:||W EW - Erforschung des Weltraums|
|DLR - Research theme (Project):||W - Vorhaben Exploration des Sonnensystems (old)|
|Institutes and Institutions:||Institute of Planetary Research > Asteroids and Comets|
|Deposited By:||Michael Mommert|
|Deposited On:||24 Oct 2012 08:30|
|Last Modified:||04 Apr 2013 16:38|
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