* 21 Com

[ α=12.5h, δ=24.6° | A2pv | d=83.4 pc ]
* 21 Com , HD 108945 , HIP 61071 , HR 4766 , TYC 1989-3213-1
Best fit:
Tstar = 8640 ± 50 K , Lstar = 38 ± 1 LSun , Rstar = 2.73 ± 0.04 RSun