HD 190257

[ α=20.1h, δ=26.9° | B8 | d=643.2 pc ]
HD 190257 , HIP 98726 , TYC 2149-388-1
Best fit:
Tstar = 10800 ± 300 K , Lstar = 350 ± 30 LSun , Rstar = 5.4 ± 0.2 RSun