V* V2564 Oph

[ α=18.1h, δ=3.8° | F6/7V | d=641.1 pc ]
HD 165195 , HIP 88527 , TYC 438-437-1
Best fit:
Tstar = 4070 ± 10 K , Lstar = 880 ± 40 LSun , Rstar = 60 ± 1 RSun