Surface Ice Spectroscopy of Pluto, Charon and Triton

Details Surface Ice Spectroscopy of Pluto, Charon and Triton Surface Ice Spectroscopy of Pluto, Charon and Triton

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007msngr.129...58p&link_type=abstract

The Messenger, vol. 129, p. 58-61

Physics

Optics

Scientific paper

We present new reflectance spectra of Pluto and Triton taken with the ESO adaptive optics instrument NACO at the VLT and covering the wavelength range 1 5 µm. Apart from known and expected absorption bands from methane ice, our data reveal new absorption bands centred around 4.0 µm and 4.6 µm never detected before. The latter absorption could be related to the presence of CO ice at the body surfaces. Charon's spectrum is also measured in the wavelength range 1 4 µm, for the first time simultaneously with, but isolated from, that of Pluto. The non-detection of Pluto's moonlets (unknown at the time of observation) in acquisition images of Pluto-Charon provides a lower limit of 18.8 mag for the K-band brightness of Hydra and Nix.

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