Asset Publisher

Compositional maps of Saturn's moon Phoebe from imaging spectroscopy

Compositional maps of Saturn's moon Phoebe from imaging spectroscopy

Publication date: 06 May 2005

Authors: Clark, R.N., et al.

Journal: Nature
Volume: 435
Page: 66
Year: 2005

Copyright: Nature Publishing Group

The origin of Phoebe, which is the outermost large satellite of Saturn, is of particular interest because its inclined, retrograde orbit suggests that it was gravitationally captured by Saturn, having accreted outside the region of the solar nebula in which Saturn formed. By contrast, Saturn's regular satellites (with prograde, low-inclination, circular orbits) probably accreted within the sub-nebula in which Saturn itself formed. Here we report imaging spectroscopy of Phoebe resulting from the Cassini-Huygens spacecraft encounter on 11 June 2004. We mapped ferrous-iron-bearing minerals, bound water, trapped CO2, probable phyllosilicates, organics, nitriles and cyanide compounds. Detection of these compounds on Phoebe makes it one of the most compositionally diverse objects yet observed in our Solar System. It is likely that Phoebe's surface contains primitive materials from the outer Solar System, indicating a surface of cometary origin.

Link to publication
Last Update: Sep 1, 2019 9:31:10 AM
6-Jul-2022 22:06 UT

ShortUrl Portlet

Shortcut URL

https://sci.esa.int/s/8dKvj5W

Images And Videos

Related Publications

Related Links

See Also

Documentation