NGC 457

Number of stars per data source

	Reference   15 :    1 star
	Reference   32 :    1 star

15: Johnson H.L., Mitchell R.I., Iriarte B., Wisniewski W.Z.; (1966) Comm. Lun. Plan. Lab. 4, 99; UBVRIJKL Photometry of the Bright Stars
32: Lee T.A.; (1970) Astrophys. J. 162, 217; Photometry of High-luminosity M-type Stars; 1970ApJ...162..217L