The Uranian satellites: Water ice on Ariel and Umbriel

Dale P. Cruikshank, R. Hamilton Brown

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


New near-infrared reflectance spectra are presented for Ariel and Umbriel. Water ice on the surface of Ariel and Umbriel is verified from spectral signatures in the 2-μm region. However, the weaker bands in Umbriel's spectrum indicate that its surface is significantly different from Ariel either in degree of contamination with dark material or in microstate. Umbriel may have a lower albedo than Ariel, Titania, and Oberon and, therefore, may have a diameter comparable to that of Titania.

Original languageEnglish (US)
Pages (from-to)607-611
Number of pages5
Issue number3
StatePublished - Mar 1981
Externally publishedYes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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