BD+75 325

[ α=8.2h, δ=75.0° | sdO5 | d=150.8 pc ]
HIP 40047 , TYC 4380-2196-1
Best fit:
Tstar = 28940 ± 50 K , Lstar = 34 ± 0.7 LSun , Rstar = 0.232 ± 0.002 RSun