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HD 133688


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Near-Infrared Spectra of Centaurs and Kuiper Belt Objects
We present here an extensive survey of near-infrared (NIR) spectra ofKuiper belt objects (KBOs) and Centaurs taken with the Keck I Telescope.We find that most spectra in our sample are well characterized by acombination of water ice and a featureless continuum. A comparativeanalysis reveals that the NIR spectral properties have littlecorrelation to the visible colors or albedo, with the exception of thefragment KBOs produced from the giant impact on 2003 EL61. The resultssuggest that the surface composition of KBOs is heterogeneous, thoughthe exposure of water ice may be controlled by geophysical processes.The Centaurs also display diverse spectral properties, but the source ofthe variability remains unclear. The results for both the KBOs and theCentaurs point to inherent heterogeneity in either the processes actingon these objects or materials from which they formed.

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Observation and Astrometry data

Constellation:Libra
Right ascension:15h06m04.77s
Declination:-09°32'17.3"
Apparent magnitude:8.475
Distance:390.625 parsecs
Proper motion RA:1.9
Proper motion Dec:-13.8
B-T magnitude:9.632
V-T magnitude:8.571

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 133688
TYCHO-2 2000TYC 5584-691-1
USNO-A2.0USNO-A2 0750-08787553
HIPHIP 73886

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