HD 278942

[ α=3.7h, δ=31.9° | O9.5-B0 | d=520.1 pc ]
HD 278942 , HIP 17113 , TYC 2359-1113-1
Best fit:
Tstar = 3908 ± 9 K , Lstar = 170 ± 20 LSun , Rstar = 29 ± 2 RSun