Abstract
We observed near-Earth asteroid (8567) 1996 HW1 at the Arecibo
Observatory on six dates in September 2008, obtaining radar images and
spectra. By combining these data with an extensive set of new
lightcurves taken during 2008-2009 and with previously published
lightcurves from 2005, we were able to reconstruct the object's shape
and spin state. 1996 HW1 is an elongated, highly bifurcated object, and
appears to be a contact binary. A convex shape model derived from the
lightcurves alone produces a pole orientation that is consistent with
the pole derived from the radar data. It is instructive to compare these
two shape models. We have also obtained near-infrared spectra at the
NASA IRTF using SpeX in both prism and LXD modes. The prism spectra show
pyroxene and olivine bands. We obtained LXD spectra (2-4 microns) on 19
August, 1 September and 1 October 2008. Thermal modeling using the shape
model and derived pole and rotation constrain the regolith properties.
The radar shape model and results of the thermal modeling will be
presented.
Original language | English |
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Pages (from-to) | 1080 |
Journal | Bulletin of the American Astronomical Society |
Volume | 42 |
Publication status | Published - 1-Oct-2010 |
Event | 42nd Meeting, American Astronomical Society, 2010 - Pasadena, United States Duration: 4-Oct-2010 → 8-Oct-2010 |