Surface characterization of 28978 Ixion (2001 KX76)

Details Surface characterization of 28978 Ixion (2001 KX76) Surface characterization of 28978 Ixion (2001 KX76)

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...415l..21b&link_type=abstract

Astronomy and Astrophysics, v.415, p.L21-L25 (2004)

Astronomy and Astrophysics

Astrophysics

32

Transneptunian Object, 28978 Ixion: 2001 Kx$_{76

Scientific paper

The Plutino 28978 Ixion, one of the largest objects in the Kuiper Belt, is measured by R filter photometry and linear polarimetry over the phase angle range as well as by BVRI colours and visible spectroscopy. Ixion is a medium red object with spectral slope of 17.7%/100 nm (400-900 nm). While its opposition phase curve surge (0.2 mag/deg) is within the typical range found for other solar system objects, it displays unusually high negative polarization (min. -1.3%). Comparison with model spectra and numerical modeling of the opposition brightening and polarization effects suggest an areal mixture of absorbing (dark) and icy (bright) compounds on its surface: the mixing ratio is about 6:1 for dark and bright material of 0.21 and 0.79 single-scattering albedo and of 250 and 33 dimensionless mean free path (length multiplied by wave number), respectively.
Based on observations collected at the ESO VLT within programs 69.C-0133 and 167.C-0340.

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