NGC 6611

Number of stars per data source

	Reference    2 :   60 stars
	Reference   39 :  536 stars
	Reference  268 :  533 stars
	Reference  284 : 2136 stars

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
39: Walker M.F.; (1961) Astrophys. J. 133, 438; Studies of extremely young clusters. IV. NGC 6611; 1961ApJ...133..438W
268: Kharchenko N., Schilbach E.; (1995) Astron. Nachr. 316, 91; Schmidt plate survey in the Galactic Centre direction. I. Investigation of open clusters in the Sagittarius-Carina spiral arm; 1995AN....316...91K
284: Belikov A.N., Kharchenko N.V., Piskunov A.E., Schilbach E.; (1999) Astron. Astrophys. Suppl. 134, 525; The extremely young open cluster NGC 6611: Compiled catalogue, absorption map and the HR diagram; 1999A&AS..134..525B