A Caltech Library Service

The Surface Composition of Large Kuiper Belt Object 2007 OR10

Brown, M. E. and Burgasser, A. J. and Fraser, W. C. (2011) The Surface Composition of Large Kuiper Belt Object 2007 OR10. Astrophysical Journal Letters, 738 (2). Art. No. L26. ISSN 2041-8205. doi:10.1088/2041-8205/738/2/L26.

PDF - Published Version
See Usage Policy.

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


We present photometry and spectra of the large Kuiper belt object 2007 OR10. The data show significant near-infrared absorption features due to water ice. While most objects in the Kuiper belt with water ice absorption this prominent have the optically neutral colors of water ice, 2007 OR10 is among the reddest Kuiper belt objects known. One other large Kuiper belt object—Quaoar—has similar red coloring and water ice absorption, and it is hypothesized that the red coloration of this object is due to irradiation of the small amounts of methane able to be retained on Quaoar. 2007 OR10, though warmer than Quaoar, is in a similar volatile retention regime because it is sufficiently larger that its stronger gravity can still retain methane. We propose, therefore, that the red coloration on 2007 OR10 is also caused by the retention of small amounts of methane. Positive detection of methane on 2007 OR10 will require spectra with higher signal to noise. Models for volatile retention on Kuiper belt objects appear to continue to do an excellent job reproducing all of the available observations.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Brown, M. E.0000-0002-8255-0545
Burgasser, A. J.0000-0002-6523-9536
Fraser, W. C.0000-0001-6680-6558
Additional Information:© 2011 The American Astronomical Society. Received 2011 May 18; accepted 2011 August 4; published 2011 August 22.
Group:UNSPECIFIED, Division of Geological and Planetary Sciences
Subject Keywords:Kuiper belt: general; Kuiper belt objects: individual (2007 OR10); molecular processes; planets and satellites: atmospheres
Issue or Number:2
Classification Code:PACS: 96.30.Xa; 96.12.Ma; 96.12.Jt
Record Number:CaltechAUTHORS:20110923-104219064
Persistent URL:
Official Citation:The Surface Composition of Large Kuiper Belt Object 2007 OR10 M. E. Brown et al. 2011 ApJ 738 L26
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25418
Deposited By: Ruth Sustaita
Deposited On:23 Sep 2011 18:51
Last Modified:09 Nov 2021 16:33

Repository Staff Only: item control page