* alf Sgr

[ α=19.4h, δ=-40.6° | B8V | d=55.7 pc ]
* alf Sgr , HD 181869 , HIP 95347 , HR 7348 , NAME Rukbat , TYC 7935-2139-1
Best fit:
Tstar = 12100 ± 100 K , Lstar = 128 ± 5 LSun , Rstar = 2.57 ± 0.03 RSun