¹H.M. Kaluna, ²J.R. Masiero, ¹K.J. Meech
¹Institute for Astronomy, University of Hawaii, 2680 Woodlawn Dr., Honolulu-HI-96822, USA
²Jet Propulsion Laboratory/Caltech, Pasadena, CA, USA

We present visible spectroscopic and albedo data of the 2.3 Gyr old Themis family and the 15 km) and small (⩽⩽15 km) Themis members suggest these phyllosilicate feature and albedo trends result from regolith variations as a function of diameter. Observations of the Beagle asteroids show a small, but notable fraction of members with phyllosilicate features. The presence of phyllosilicates and the dynamical association of the main-belt comet 133P/Elst-Pizarro with the Beagle family imply the Beagle parent body was a heterogenous mixture of ice and aqueously altered minerals.

Reference
Kaluna HM, Masiero JR, Meech KJ (2015) Space Weathering Trends Among Carbonaceous Asteroids. Icarus (in Press)
Link to Article [doi:10.1016/j.icarus.2015.09.007]
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