The asteroid 4769 Castalia (/kɨˈsteɪliə/ kə-STAY-lee-ə; previously known by the provisional designation 1989 PB) was the first asteroid to be modeled by radar imaging. It is an Apollo Mars- and Venus-crosser asteroid. It was discovered on August 9 1989 by Eleanor F. Helin (Caltech) on photographic plates taken at Palomar Observatory. It is named after Castalia a nymph in Greek mythology.
This page contains content from the copyrighted Wikipedia article "4769 Castalia"; that content is used under the GNU Free Documentation License (GFDL). You may redistribute it, verbatim or modified, providing that you comply with the terms of the GFDL.