Title :

“TNOs are Cool”: A survey of the trans-Neptunian region VII. Size and surface characteristics of (90377) Sedna and 2010 EK139

Author(s) :

Pal, A. [Auteur]
Kiss, C. [Auteur]
Mueller, T. G. [Auteur]
Santos-Sanz, P. [Auteur]
Laboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA]
Vilenius, E. [Auteur]
Max-Planck-Institut für Extraterrestrische Physik [MPE]
Szalai, N. [Auteur]
Mommert, M. [Auteur]
DLR Institute of Planetary Research
Lellouch, E. [Auteur]
Laboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA]
Rengel, M. [Auteur]
Max-Planck-Institut für Sonnensystemforschung [MPS]
Hartogh, P. [Auteur]
Max-Planck-Institut für Sonnensystemforschung [MPS]
Protopapa, S. [Auteur]
Stansberry, J. [Auteur]
Lunar and Planetary Laboratory [Tucson] [LPL]
Ortiz, J. -L. [Auteur]
Duffard, R. [Auteur]
Instituto de Astrofísica de Andalucía [IAA]
Thirouin, A. [Auteur]
Instituto de Astrofísica de Andalucía [IAA]
Henry, F. [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Delsanti, A. [Auteur]
Laboratoire d'Astrophysique de Marseille [LAM]

Journal title :

Astronomy and Astrophysics - A&A

Publisher :

EDP Sciences

Publication date :

2012-05

ISSN :

0004-6361

HAL domain(s) :

Planète et Univers [physics]/Astrophysique [astro-ph]

English abstract : [en]

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, ...
Show more >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(-10)(+35) km, while the respective geometric albedos are p(V) = 0.32 +/- 0.06 and 0.25(-0.05)(+0.02). These estimates are based on thermophysical model techniques.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL