Solar System Astrometry at the USNO Flagstaff Station

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Beginning with the Galileo mission as it approached the asteroid Gaspra, the US Naval Observatory Flagstaff Station has collaborated closely with the JPL navigation team to provide highly accurate astrometry of various Solar System bodies that were targets of numerous spacecraft encounters. This led to the development at Flagstaff of an automated Solar System observing project, employing a small transit telescope equipped with a CCD camera (Stone et al. 1999), known as FASTT, for Flagstaff Astrometric Scanning Transit Telescope. In 2004, an astrometric survey was begun with the FASTT, with the goal of improving the orbits of all the asteroids brighter than VR 17. The goals of the survey also included determination of asteroid masses, rotation rates, and morphology. In addition to the brighter asteroids, certain comets, planetary satellites, and dwarf planets were included in the target list. This poster will describe the results of this survey to date, and the next phase of the project now getting underway.

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