Adaptive Optics (AO) imaging can determine an asteroid's pole and dimensions in 1 or 2 nights on a single target, rather than the years of observations with typical lightcurve inversion techniques that only yield poles and axial ratios, not the true dimensions. Observations obtained at Gemini N. and with Keck, using NGS AO, have determined the triaxial dimensions, shapes, and pole directions (spin vectors) for a number of smaller asteroids. The triaxial dimensions permit accurate determination of the body's volume so that densities can be calculated to much greater precision than currently known. We will present results for a number of asteroids observed in December, 2008 at Gemini N. One of the asteroids was 9 Metis. 168 AO images ( = 2.15μ m ) were obtained during its rotational period and, assuming the asteroid to be modeled as a triaxial ellipsoid, its dimensions were found to be 218 ± 3 × 175 ± 3 × 112 ± 47 km. Fig. 1 shows linear deconvolved images obtained with the mean of 12 images and model point spread functions, compared with corresponding lightcurve inversion models projected to the times and geometries of the Gemini N. images. There is strong correspondence between the two techniques illustrating that similar information can be obtained in just only two nights worth of observing.