NGC 4609

Number of stars per data source

	Reference  430 :    3 stars
	Reference  508 :    1 star
	Reference  527 :    3 stars

430: Franco G.A.P.; (1989) Astron. Astrophys. Suppl. 77, 227; Stromgren and HBeta photometry of stars earlier than G0 in the southern Coalsak direction; 1989A&AS...77..227F
508: Olsen E.H.; (1994) Astron. Astrophys. Suppl. 104, 429; A large, complete, volume-limited sample of G-type dwarfs. I. Completion of Stromgren uvby photometry; 1994A&AS..104..429O