Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13r.771h&link_type=abstract
In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J
Astronomy and Astrophysics
Astronomy
Chondrites
Scientific paper
The near-Earth asteroid 2002 NY40 was discovered on July 14 2002 by the LINEAR survey. The object made a close pass by the Earth on August 18 when observations were obtained at a large range of wavelengths from visible to radar (12.6 cm). The combination of visible and near-infrared spectroscopy gives some indication of the composition. Thermal emission in the 3-micron region gives constraints on the visible albedo which are confirmed independently by the radar size and visible magnitude. The lightcurve was well measured by a large number of observers and the rotation period is well-determined at 19.99 hours. The spectrum and albedo are a very good match to an LL chondrite spectrum over the range measured. No appreciable reddening is seen in the asteroid spectrum which suggests that the surface has not been noticeably affected by the same processes seen in many other pyroxene and olivine-rich asteroids. The radar images show that this asteroid looks like two spheroidal units joined together. Analysis and implications of these observations will be discussed.
Binzel Richard P.
Black Gregory
Bus Schelte J.
Hicks Michael
Howell Ellen S.
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