9564 Jeffwynn (1987 SG3) is a Mars-crossing asteroid discovered on September 26 1987 by C. S. Shoemaker and E. M. Shoemaker at Palomar. It is named for an American geophysicist Jeff Wynn. The asteroid light curve shows a period of 3.035 ± 0.001 hours.
This page contains content from the copyrighted Wikipedia article "9564 Jeffwynn"; 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.