A portrait of the extreme solar system object 2012 DR30

Kiss, Cs. and Szabo, Gy. and Horner, J. and Conn, B. C. and Muller, T. G. and Vilenius, E. and Sarneczky, K. and Kiss, L. L. and Bannister, M. and Bayliss, D. and Pal, A. and Gobi, S. and Verebelyi, E. and Lellouch, E. and Santos-Sanz, P. and Ortiz, J. L. and Duffard, R. and Morales, N. (2013) A portrait of the extreme solar system object 2012 DR30. Astronomy and Astrophysics, 555. A3. ISSN 0004-6361

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2012 DR30 is a recently discovered solar system object on a unique orbit, with a high eccentricity of 0.9867, a perihelion distance of 14.54 AU, and a semi-major axis of 1109 AU, in this respect outscoring the vast majority of trans-Neptunian objects (TNOs). We performed Herschel/PACS and optical photometry to uncover the sizeand albedo of 2012 DR30, together with its thermal and surface properties. The body is 185 km in diameter and has a relatively low V-band geometric albedo of ∼8%. Although the colours of the object indicate that 2012 DR30 is an RI taxonomy class TNO or Centaur, we detected an absorption feature in the Z-band that is uncommon among these bodies. A dynamical analysis of the target's orbit shows that 2012 DR30 moves on a relatively unstable orbit and was most likely only recently placed on its current orbit from the most distant and still highly unexplored regions of the solar system. If categorised on dynamical grounds 2012 DR30 is the largest Damocloid and/or high inclination Centaur observed so far.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 ESO. This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 22 Jul 2014 03:50
Last Modified: 23 Mar 2017 00:35
Uncontrolled Keywords: Kuiper belt objects; 2012 DR30; dynamical analysis
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
02 Physical Sciences > 0205 Optical Physics > 020504 Photonics, Optoelectronics and Optical Communications
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020109 Space and Solar Physics
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1051/0004-6361/201321147
URI: http://eprints.usq.edu.au/id/eprint/25590

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