We observed near-Earth asteroid 2006 AM4 on Jan 31-Feb 2 2007.
It was known to have a rotation period of 304.9 sec from lightcurve
observations by Carl Hergenrother in the weeks before our observations.
While not the fastest rotator known, this is unusually fast for an object
that is 150m in diameter. No loose material can be sitting on the surface.
The radar observations confirmed this fast period and we obtained images.
The movie below is 100 images phased using Carl's rotation period.
|A mosaic of several images.|
|Movie of 2006 AM4|