TY - JOUR
T1 - The Uranian satellites
T2 - Water ice on Ariel and Umbriel
AU - Cruikshank, Dale P.
AU - Hamilton Brown, R.
N1 - Funding Information:
We thank Dr. R. N. Clark for making available his spectra in digital form and for assistance in the reduction of the data. Miss Larrene Harada assisted in a preliminary analysis of the data. Supported in part by NASA Grant NGL 12-001-057.
Funding Information:
1 Visiting Astronomer, Kitt Peak National Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under contract with the National Science Foundation. 2 Also affiliated with Hawaii, Institute of Geophysics, University of Hawaii.
PY - 1981/3
Y1 - 1981/3
N2 - 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.
AB - 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.
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U2 - 10.1016/0019-1035(81)90026-9
DO - 10.1016/0019-1035(81)90026-9
M3 - Article
AN - SCOPUS:0012797916
SN - 0019-1035
VL - 45
SP - 607
EP - 611
JO - Icarus
JF - Icarus
IS - 3
ER -