Identification of Water Ice on the Centaur 1997 CU26-Reference-Cited by-同舟云学术

Identification of Water Ice on the Centaur 1997 CU26

Published:1998-05-29 Issue:5368 Volume:280 Page:1430-1432
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Brown Robert H.¹²³,Cruikshank Dale P.¹²³,Pendleton Yvonne¹²³,Veeder Glenn J.¹²³

Affiliation:

1. R. H. Brown, Lunar and Planetary Lab and Steward Observatory, University of Arizona, Tucson, AZ 85721, USA.

2. D. P. Cruikshank and Y. Pendleton, NASA Ames Research Center, M.S. N245-6, Moffett Field, CA 94035, USA.

3. G. J. Veeder, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.

Abstract

Spectra of the Centaur 1997 CU26 were obtained at the Keck Observatory on 27 October 1997 (universal time). The data show strong absorptions at 1.52 and 2.03 micrometers attributable to water ice on the surface of 1997 CU26. The reflectance spectrum of 1997 CU26 is matched by the spectrum of a mixture of low-temperature, particulate water ice and spectrally featureless but otherwise red-colored material. Water ice dominates the spectrum of 1997 CU26, whereas methane or methane-like hydrocarbons apparently dominate the spectrum of the Kuiper belt object 1993 SC, perhaps indicating different origins, thermal histories, or both for these two objects.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference23 articles.

1. Minor Planet Circ. 31010 (1997).

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3. D. Jewitt J. Luu J. Chen ibid. 112 1225 (1996).

4. G. P. Kuiper, in Astrophysics (McGraw-Hill, New York, 1951), pp. 357–424; Edgeworth K. E., Mon. Not. R. Astron. Soc. 109, 600 (1948).

5. 1997 CU26 is in a moderately eccentric orbit of inclination 23.4° lying mostly between Saturn and Uranus. Its aphelion distance is 18.36 astronomical units (AU) barely inside the orbit of Uranus. Its estimated diameter is 440 km comparable to Uranus' satellite Miranda and Neptune's satellite Nereid. The orbital period of 1997 CU26 is 62.9 years.

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