cos ▁mission , ▁this ▁star ▁is ▁at ▁a ▁distance ▁of ▁ ▁from ▁Earth , ▁give ▁or ▁take ▁a ▁ 2 0   light - year ▁margin ▁of ▁error . ▁At ▁this ▁distance , ▁the ▁bright ness ▁of ▁the ▁star ▁is ▁dimin ished ▁from ▁ext inction ▁caused ▁by ▁inter stell ar ▁gas ▁and ▁dust . ▁ ▁The ▁spectrum ▁of ▁ 2 7 ▁Aqu il ae ▁fits ▁a ▁stell ar ▁classification ▁of ▁B 9   III , ▁with ▁the ▁lum inos ity ▁class ▁of ▁III ▁typically ▁indicating ▁this ▁is ▁an ▁evol ved ▁giant ▁star . ▁As ▁it ▁ ▁lies ▁within ▁the ▁field ▁of ▁view ▁of ▁the ▁Co Ro T ▁satellite , ▁close ▁observation ▁have ▁been ▁made ▁of ▁its ▁lum inos ity . ▁The ▁star ▁shows ▁a ▁multi period ic ▁vari ability ▁with ▁at ▁least ▁six ▁p uls ation ▁frequencies ▁discovered . ▁It ▁has ▁a ▁high ▁rate ▁of ▁rotation ▁with ▁a ▁project ed ▁rot ational ▁velocity ▁of ▁ 5 5   km / s . ▁The ▁outer ▁atmosphere ▁is ▁radi ating ▁energy ▁into ▁space ▁at ▁an ▁effective ▁temperature ▁of ▁around ▁ 1 1 , 5 0 0   K , ▁giving ▁it ▁the ▁blue - white ▁h ue ▁of ▁a ▁B - type ▁star . ▁ ▁References ▁ ▁Category : A qu ila ▁( const ell ation ) ▁Category : B - type ▁gi ants ▁Aqu il ae , ▁d ▁Aqu il ae , ▁ 2 7 ▁ 1 8 1 4 4 0 ▁ 0 9 5 0 7 3 ▁ 7 3 3 6