AAS 201st Meeting, January, 2003
Session 4. Eclipsing and Spectroscopic Binaries
Poster, Monday, January 6, 2003, 9:20am-6:30pm, Exhibit Hall AB

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[4.09] The 2002 Eclipses of OW Geminorum

D. Terrell (SwRI), D.H. Kaiser (Columbus, IN), A.A. Henden (USNOFS), R. Koff (Denver, CO), D. West (Derby, KS), S. Dvorak (Clermont, FL), C. Pullen (Wilton, CA), C. Stephan (Sebring, FL)

We present UBVRcIc observations of the double supergiant binary OW Geminorum (F2 Ib-II, G8 IIb), including the first multi-color observations of the secondary eclipse. With a 3.5 year orbital period, its eclipses are only visible every seven years. Previous coverage of the primary eclipse from 1995 indicated that the eclipse was very close to being total. Mid-eclipse in 2002 was well-placed for North American observers and our high time resolution observations show that there is no period of totality. We also present a simultaneous light and radial velocity curve solution using the Wilson-Devinney code. We gratefully acknowledge the support of the AAS Small Research Grants Program for this and other binary star research projects.

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Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.