Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21544111a&link_type=abstract
American Astronomical Society, AAS Meeting #215, #441.11; Bulletin of the American Astronomical Society, Vol. 42, p.402
Astronomy and Astrophysics
Astronomy
Scientific paper
Most optical/infrared interferometric observations have targeted stars, since they make the easiest targets because of their high surface brightness. Lower surface brightness targets such as asteroids are more difficult, since those that are small enough not to be resolved out by typical interferometer baselines are too faint to produce detectable fringes within the atmospheric coherence time. We describe our recent success in detecting a non-stellar target, the geostationary communications satellite DirecTV-9S, with a 16 meter baseline of the NPOI, using specularly reflected light when the Sun-satellite-NPOI geometry was favorable. The fringe visibility vs. wavelength suggests a two-component image consisting of a high(er) surface brightness component of 1 m size and a lower surface brightness component of 3 m size.
This work is funded by the Office of Naval Research and the Oceanographer of the Navy.
Armstrong J. J.
Benson Andrew J.
Hindsley Robert B.
Hutter Donald J.
Schmitt Henrique R.
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