Water Ice on Nereid

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

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


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 CU26 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.

Original languageEnglish (US)
Pages (from-to)374-378
Number of pages5
Issue number2
StatePublished - Jun 1999


  • Icy
  • Nereid
  • Spectroscopy
  • Surface composition
  • Surfaces

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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