Physics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..666m&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.666
Physics
Scientific paper
Near-Earth asteroid (8567) 1996 HW1 was observed spectroscopically at 1.9-4.0 microns during August- October 2008 using the SpeX instrument at NASA's Infrared Telescope Facility (IRTF). These spectra are being modeled using a new thermophysical program that accounts for the object's spin orientation and highly bifurcated shape as previously determined via inversion of radar images and lightcurve data [4]. Our three observing dates included two broadside orientations and one nearly end-on view. Modeling the asteroid's thermal emission using its estimated contact-binary shape yields significantly different predictions than modeling it as a sphere. Radar observations indicate that a significant fraction of near-Earth asteroids may be contact binaries [1], and thus it follows that radiometric asteroid diameters derived from single sightings by, for example, the WISE satellite will have substantial uncertainties.
Fernandez Yan R.
Howell Ellen S.
Magri Christopher
Mueller Marcus
Nolan Michael C.
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