(PhysOrg.com) -- One of the worlds largest optical/infrared telescopes has captured near-infrared light images of asteroid YU55 as it was departing its close flyby of Earth the night of Nov. 8, 2011. The observing run on the Keck II telescope was webcast live to a large audience on UStream directly from the Keck II Telescope Remote Operations room in Kamuela, Hawaii.
At the helm of the 10-meter telescope and using Kecks pioneering adaptive optics to view YU55 were asteroid investigators William Merline and Peter Tamblyn of Southwest Research Institute, Boulder, Colo.; and Chris Neyman of Keck Observatory.
The first unprocessed infrared images of the coal-black asteroid appear to confirm that the asteroid does not have any small companion satellites and that it may be somewhat smaller than some researchers have suspected.
Asteroid YU55, made its closest approach to Earth - just 324,600 kilometers on Nov. 8 at 3:26 pm U.S. PST. Merlines research is funded by NASAs Planetary Astronomy Program and NSFs Planetary Astronomy Program. More updates and images are forthcoming.
Explore further: How bad can solar storms get?