WE PROPOSE A THREE-YEAR NEAR-INFRARED SPECTROSCOPIC STUDY OF ASTEROIDS IN THE POLANA AND ERIGONE FAMILIES. OUR PRIMARY GOAL IS TO TEST DYNAMICAL MODELS THAT SUGGEST AT LEAST TWO OF THE CURRENT SAMPLE-RETURN SPACECRAFT TARGETS (1999 RQ36 AND 1996 FG3) COME FROM THE POLANA FAMILY AND A THIRD (1999 JU3) MAY BE LINKED TO EITHER THE POLANA OR ERIGONE FAMILIES. IN ADDITION OUR STUDY WILL ADDRESS OTHERQUESTIONS SUCH AS FAMILY HETERO/HOMOGENEITY AND SPECTRAL PROPERTIES AS A FUNCTION OF ASTEROID SIZE; THESE QUESTIONS ARE RELEVANT TO THE ORIGIN AND EVOLUTION OF THESE FAMILIES OF THE SPACECRAFT TARGETS AND OTHER NEAR-EARTH ASTEROIDS AND OF THE SOLAR SYSTEM IN GENERAL. THIS PROJECT IS DIRECTLY RELEVANT TO NASA'S OSIRIS-REX SAMPLE-RETURN MISSION TO ASTEROID 1999 RQ36.