NGC 457

Number of stars per data source

	Reference    1 :  936 stars
	Reference    2 :   99 stars
	Reference    6 :  160 stars

1: Moffat A.F.J., Vogt N.; (1974) Veroeff. Astron. Inst. Bochum no 2; Photographische UBV-helligkeiten in 14 jungen Sternhaufen der nordlichen Milchstrasse; 1974VeBoc...2....1M
2: Hoag A.A., Johnson H.L., Iriarte B., Mitchell R.I., Hallam K.L., Sharpless S.; (1961) Publ. Us. Nav. Obs. XVII part VII, 347; Photometry of stars in galactic cluster fields
6: Jones D.O.M., Hoag A.A.; (1968) Publ. Astron. Soc. Pacific 80, 531; Photographic photometry of stars in NGC 457; 1968PASP...80..531J