▁be ▁a ▁T ▁Ta uri ▁star . ▁ ▁The ▁cluster ▁is ▁considered ▁to ▁include ▁a ▁number ▁of ▁other ▁stars ▁of ▁spectral ▁class ▁A ▁or ▁B : ▁ ▁HD ▁ 3 7 6 9 9 , ▁an ▁out lying ▁B 5 ▁giant ▁very ▁close ▁to ▁the ▁Hor se head ▁Neb ula ▁ ▁HD ▁ 3 7 5 2 5 , ▁a ▁B 5 ▁main ▁sequence ▁star ▁and ▁spect ro scop ic ▁binary ▁ ▁HD ▁ 2 9 4 2 7 1 , ▁a ▁B 5 ▁young ▁stell ar ▁object ▁with ▁two ▁low ▁mass ▁compan ions ▁ ▁HD ▁ 2 9 4 2 7 2 , ▁a ▁binary ▁containing ▁two ▁B ▁class ▁young ▁stell ar ▁objects ▁ ▁HD ▁ 3 7 3 3 3 , ▁a ▁peculiar ▁A 1 ▁main ▁sequence ▁star ▁ ▁HD ▁ 3 7 5 6 4 , ▁an ▁A 8 ▁young ▁stell ar ▁object ▁ ▁V 1 1 4 7 ▁Ori , ▁a ▁B 9 . 5 ▁giant ▁and ▁α 2 ▁CV n ▁variable ▁ ▁HD ▁ 3 7 6 8 6 , ▁a ▁B 9 . 5 ▁main ▁sequence ▁star ▁close ▁to ▁HD ▁ 3 7 6 9 9 ▁ ▁HD ▁ 3 7 5 4 5 , ▁an ▁out lying ▁B 9 ▁main ▁sequence ▁ ▁HD ▁ 2 9 4 2 7 3 , ▁an ▁A 8 ▁young ▁stell ar ▁object ▁▁ 2 MA SS ▁J 0 5 3 7 4 1 7 8 - 0 2 2 9 0 8 1 , ▁an ▁A 9 ▁young ▁stell ar