▁of ▁k A 5 h A 7 m A 7 ▁( IV – V ), ▁which ▁matches ▁a ▁bl end ▁of ▁sub gi ant ▁and ▁main ▁sequence ▁lum inos ity ▁classes ▁with ▁the ▁K - line ▁( k A 5 ) ▁of ▁an ▁A 5 ▁star ▁and ▁the ▁hydro gen ▁( h A 7 ) ▁and ▁metal ▁( m A 7 ) ▁absor ption ▁lines ▁of ▁an ▁A 7 ▁star . ▁It ▁is ▁an ▁Al pha 2 ▁Can um ▁Ven atic orum - type ▁variable ▁with ▁magnitude ▁r anging ▁from ▁ 4 . 6 2 ▁down ▁to ▁ 4 . 6 7 ▁over ▁a ▁period ▁of ▁ 1 4 ▁days . ▁The ▁star ▁is ▁radi ating ▁ 6 0 ▁times ▁the ▁Sun ' s ▁lum inos ity ▁from ▁its ▁photos phere ▁at ▁an ▁effective ▁temperature ▁of ▁ 8 , 0 8 4   K . ▁ ▁References ▁ ▁Category : A - type ▁gi ants ▁Category : Am ▁stars ▁Category : Alpha 2 ▁Can um ▁Ven atic orum ▁variables ▁Category : V ul pe cul a ▁Category : D urch m uster ung ▁objects ▁V ul pe cul ae , ▁ 1 5 ▁ 1 8 9 8 4 9 ▁ 0 9 8 5 4 3 ▁ 7 6 5 3 ▁V ul pe cul ae , ▁N T <0x0A> </s> ▁A ▁refer endum ▁on ▁holding ▁early ▁elections ▁was ▁held ▁in ▁the ▁Republic ▁of ▁Ser bia ▁on ▁ 1 1 ▁October ▁ 1 9 9 2 . ▁The ▁proposal ▁was ▁approved ▁by