Detection of Water Ice on Nereid

Details Detection of Water Ice on Nereid Detection of Water Ice on Nereid

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...508l.175b&link_type=abstract

The Astrophysical Journal, Volume 508, Issue 2, pp. L175-L176.

Astronomy and Astrophysics

Astronomy

11

Infrared: Solar System, Minor Planets, Planets And Satellites: Individual: Nereid

Scientific paper

We report the detection of the 1.5 and 2.0 μm absorption bands of water ice in the near-infrared reflection spectrum of Neptune's distant irregular satellite Nereid. The spectrum and albedo of Nereid appear intermediate between those of the Uranian satellites Umbriel and Oberon, suggesting a surface composed of a combination of water ice frost and a dark and spectrally neutral material. In contrast, the surface of Nereid appears dissimilar to those of the outer solar system minor planets Chiron, Pholus, and 1997 CU_26. The spectrum thus provides support for the hypothesis that Nereid is a regular satellite formed in a circumplanetary environment rather than a captured object.

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