sequence ▁star ▁with ▁a ▁stell ar ▁classification ▁of ▁B 9 . 5 V nn ▁( λ ▁Bo o ), ▁where ▁the ▁' n ' ▁indicates ▁" ne bul ous " ▁lines ▁due ▁to ▁rapid ▁rotation . ▁Ab t ▁and ▁Mor rell ▁( 1 9 9 5 ) ▁listed ▁it ▁as ▁a ▁L ambda ▁Bo öt is ▁star , ▁although ▁this ▁is ▁disput ed . ▁It ▁has ▁ 2 . 7 ▁times ▁the ▁mass ▁of ▁the ▁Sun ▁and ▁is ▁spin ning ▁rapidly ▁with ▁a ▁project ed ▁rot ational ▁velocity ▁of ▁ 2 4 9   km / s . ▁The ▁star ▁is ▁radi ating ▁ 8 6 ▁times ▁the ▁Sun ' s ▁lum inos ity ▁from ▁its ▁photos phere ▁at ▁an ▁effective ▁temperature ▁of ▁ 9 , 9 7 7   K . ▁ ▁The ▁f ain ter ▁secondary ▁component ▁is ▁an ▁A - type ▁main - sequence ▁star ▁with ▁a ▁class ▁of ▁A 2   V n . ▁It ▁shows ▁a ▁project ed ▁rot ational ▁velocity ▁of ▁ 2 7 0   km / s ▁and ▁has ▁ 2 . 7 ▁times ▁the ▁Sun ' s ▁mass . ▁The ▁star ▁sh ines ▁with ▁ 7 3 ▁times ▁the ▁Sun ' s ▁lum inos ity ▁at ▁an ▁effective ▁temperature ▁of ▁ 9 , 8 4 0   K . ▁ ▁References ▁ ▁Category : A - type ▁main - sequence ▁stars ▁Category : B - type ▁main - sequence ▁stars ▁Category : Binary ▁stars ▁Category : And rom eda ▁( const ell ation )