We present a V light curve of the eclipsing binary system HV 2543 ( Sk–67 $ ° $ 117 ) in the Large Magellanic Cloud based on CCD images acquired between the years 1995 and 1998 .
We have analysed this light curve and published radial velocity data , finding that this system is semidetached , with the secondary ( less massive and less luminous component ) filling its Roche lobe .
From our analysis with the Wilson-Devinney code , we estimated the following masses and radii for the components of HV 2543 : M _ { 1 } = 25.63 \pm 0.7 { M } _ { \sun } , R _ { 1 } = 15.54 \pm 0.4 { R } _ { \sun } , M _ { 2 } = 15.63 \pm 1.0 { M } _ { \sun } and R _ { 2 } = 13.99 \pm 0.4 { R } _ { \sun } .
On the basis of B and V photometry of the field stars , we found that HV 2543 is member of an OB association , perhaps related to which the massive binary system Sk–67 $ ° $ 105 belongs .