NGC 7092

Number of stars per data source

	Reference   21 :    4 stars
	Reference   22 :    4 stars
	Reference  560 :   17 stars

21: Johnson H.L.; (1953) Astrophys. J. 117, 353; Magnitudes colors and spectral types in M39; 1953ApJ...117..353J
22: Weaver H.F.; (1953) Astrophys. J. 117, 366; Magnitudes, colors and spectral-type relations in the galactic cluster M39; 1953ApJ...117..366W
560: Abt H.A., Levato H.; (1976) Publ. Astr. Soc. Pacific 88, 222; Spectral types in the open cluster M39; 1976PASP...88..222A