NOTE: Water Ice on Nereid

Details NOTE: Water Ice on Nereid NOTE: Water Ice on Nereid

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icar..139..374b&link_type=abstract

Icarus, Volume 139, Issue 2, pp. 374-378.

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8

Scientific paper

A near-infrared spectrum of Neptune's satellite Nereid was obtained at the Keck Observatory on 1997 May 1. The spectrum shows two absorptions near 1.54 and 2.03 μm and is well matched by a synthetic spectrum of an intimate mix of low-temperature, particulate water ice and dark, blue-colored material. Comparisons of Nereid's spectrum with those of other objects such as the Centaurs 1997 CU_26 and 5145 Pholus, and Neptune's largest regular satellite Proteus, admit the possibility that Nereid is a primordial satellite of Neptune (and perhaps its only remaining one) rather than a captured object, but more data are needed to rule out one scenario or the other.

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