RY GEMINORUM - REVISED ELEMENTS

The uncorrected, original UBV light curves of the semidetached totally eclipsing binary system RY Geminorum (RY Gem), obtained by Hall et al , (1982, Acta Astron., 32, 411), were analyaed, using the Wilson-Devin ney (W-D) method. From these analyses, an improved value for the mass- ratio, ii, equal to 0.1925 and reliable geometrical elements were deri ved. They ive the following. revised absolute elements of RY Gem: A/R- .=25.04+/-0.551 m(h)/m(.)=2.04+/-0.11, m(c)/m(.)=0.39+/-0.05, R-h/R-.= 2.38+/-0.09, R-c/R-.=6.19+/-0.20, log L-h/L-.=1.53+/-0.22, and log L-c /L-.=0.94+/-0.21. From the derived dereddened (B - V)(0) colors, the p rimary and secondary components are found to belong to the spectral ty pes of A2 V and K0-3IV-V, respectively, From their dereddened (U - B)( 0) colors, it if noticed that both the components have UV excess of O. (m)14. When compared to single main sequence stars of similar mass, bo th the components are found to be overluminous, bigger, and hotter for their masses. On the PI-R diagram of the normal main sequence stars, the primary is found to lie on the main sequence but at a position of luminosity lightly higher for its mass, The secondary component is far above the main sequence and is overluminous by about 4.(m)5. (C) 1997 American Astronomical Society.