OW Geminorum: Visual Observations of the
Bisleri 11, I-20148 Milano, Italy
October 2003; revised August 2004
124 visual observations
of the long period eclipsing binary OW Geminorum were obtained by 10 AAVSO
observers during its 2002 eclipse. Time of minimum was computed using the tintagel computer program (Gaspani
1995). A least squares linear regression was applied to O-C values and the
obtained slope confirms the known ephemeris:
MinI = JD 2415779.0 + 1258.59 E.
± 0.4 ± 0.03
Another least squares linear regression
was applied only to the O-C values given by direct observations since its
discovery (1988) and the following new ephemeris is suggested:
MinI = JD 2452278.0880 + 1258.6815 E.
± 0.9221 ± 0.0260
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