Current assessment: JPL NEOPO
Diameter: 79 meters (JPL 16 May 2008 estimate, see Notes)
JPL: Orbit Viewer NEODyS: object home page [backup] & observations [backup]
Circulars: MPEC 2006-F47
Notes: 2006 FW33 was discovered on 26 March 2006 by the Mt. Lemmon Survey and announced on the 29th, which is when JPL posted it with impact solutions.
When calculating H for this object -- its absolute magnitude and the only indicator of its size -- the nominal orbit would have it at H=20.2, very roughly 320 meters in diameter. But the mean H calculated from JPL's virtual impact orbits, H=23.2, cuts the size estimate to a fourth of that.
This object was not reported observed again after discovery and was calculated to go out out of view for most NEO observers on April 11th and became lost, although theoretically in view for large telescopes into early August.
Packed designation: K06F33W