  We present ~2"-4" aperture synthesis observations of the circumstellar disk
surrounding the nearby young star TW Hya in the CO J=2--1 and J=3--2 lines and
associated dust continuum obtained with the partially completed Submillimeter
Array. The extent and peak flux of the 230 and 345 GHz dust emission follow
closely the predictions of the irradiated accretion disk model of Calvet et al.
(2002). The resolved molecular line emission extends to a radius of at least
200 AU, the full extent of the disk visible in scattered light, and shows a
clear pattern of Keplerian rotation. Comparison of the images with 2D Monte
Carlo models constrains the disk inclination angle to 7+/-1 degrees. The CO
emission is optically thick in both lines, and the kinetic temperature in the
line formation region is ~20K. Substantial CO depletion, by an order of
magnitude or more from canonical dark cloud values, is required to explain the
characteristics of the line emission.
