▁( with ▁a ▁ 1 0 % ▁margin ▁of ▁error ). ▁ ▁The ▁spectrum ▁of ▁K appa ▁Aqu il ae ▁matches ▁a ▁stell ar ▁classification ▁of ▁B 0 . 5   III , ▁where ▁the ▁lum inos ity ▁class ▁of ▁III ▁is ▁typically ▁associated ▁with ▁evol ved ▁giant ▁stars . ▁This ▁is ▁a ▁star ▁with ▁ 1 5 . 5 0 ▁times ▁the ▁Sun ' s ▁mass ▁and ▁ 1 2 . 5 ▁times ▁the ▁radius ▁of ▁the ▁Sun . ▁Mass ive ▁stars ▁like ▁this ▁bla ze ▁bright ly ; ▁it ▁is ▁radi ating ▁ 5 2 , 6 3 0 - fold ▁the ▁Sun ' s ▁lum inos ity ▁from ▁its ▁outer ▁atmosphere ▁with ▁an ▁effective ▁temperature ▁of ▁ 2 6 , 5 0 0   K , ▁giving ▁it ▁the ▁inten se ▁blue - white ▁g low ▁of ▁a ▁B - type ▁star . ▁It ▁is ▁only ▁ 1 1 ▁million ▁years ▁of ▁age ▁and ▁is ▁spin ning ▁rapidly ▁with ▁a ▁project ed ▁rot ational ▁velocity ▁of ▁ 2 6 5   km / s . ▁ ▁Et ym ology ▁In ▁Chinese , ▁ ▁( ), ▁meaning ▁Right ▁Flag , ▁refers ▁to ▁an ▁a ster ism ▁consisting ▁of ▁ κ ▁Aqu il ae , ▁ μ ▁Aqu il ae , ▁ σ ▁Aqu il ae , ▁ δ ▁Aqu il ae , ▁ ν ▁Aqu il ae , ▁ 4 2 ▁Aqu il ae , ▁ ι ▁Aqu il ae , ▁HD ▁ 1 8 4 7 0 1 ▁and ▁