Collinder 228

Number of stars per data source

	Reference    3 :    6 stars
	Reference   33 :   81 stars

3: Graham J.A.; (1968) Bull. Astron. Inst. Netherlands Suppl. 2, 397; Five-colour photometry of 454 O and B stars in Carina; 1968BANS....2..397G
33: The P.S., Bakker R., Antalova A.; (1980) Astron. Astrophys. Suppl. 41, 93; Studies of the Carina nebula : IV. A new determinition of the distances of the open clusters Tr 14, Tr 15, Tr 16 and Cr 228 based on Walraven photometry; 1980A&AS...41...93T