29085 Sethanne (1979 SD) is a main-belt asteroid discovered on September 17 1979 by Brian G. Marsden at Harvard College Agassiz Station.Sethanne Howard (b. 1944) is an American astronomer who has held positions with U.S national observatories NASA the National Science Foundation and the U.S. Navy; Chief of the U.S. Nautical Almanac Office 200-2003. Her research specialty is galactic dynamics.
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