U.S. Naval Observatory
P.O. Box 1149
Flagstaff, Arizona 86002 USA
The Flagstaff 20-cm CCD transit telescope can observe objects brighter than V~17 mag directly in the extragalactic reference frame with an accuracy of +/- 0.15 arcsec in both coordinates. Besides being very accurate, these observations are not affected by zonal errors known to exist in most optical catalogs of star positions; and consequently, systematic errors are believed to be quite small. This paper presents observations for the planets Uranus, Neptune, and Pluto, and for numerous asteroids. The observed planetary positions are in excellent agreement with their recent DE403 JPL ephemerides, and the observations presented for Pluto are probably the most accurate to date. Moreover, asteroids have been observed for various projects, including asteroids for the Galileo (951 Gaspra and 243 Ida) and NEAR (253 Mathilde and 433 Eros) spacecraft encounters, mass determinations for asteroids, and for predicting possible occultations. Flagstaff observations have contributed to the successfully observed occultations of 654 Zelinda, 85 Io, and Triton. This paper discusses these observations as well as new methods for determining positions with CCD telescopes.