NGC 6520

Number of stars per data source

	Reference    1 :    2 stars
	Reference   13 :    1 star
	Reference   33 :    2 stars
	Reference  128 :    4 stars

1: Egret D.; (1986) Private Communication; Coordinates from SIMBAD (mainly SAO)
13: King D.S.; (1979) Sydney Obs. Papers no 83; Proper motions in the region of the galactic cluster NGC 4103; 1979SydOP..83....0K
33: Egret D.; (1986) Private communication; Coordinates from SIMBAD (other than SAO)
128: Lasker B.M., Russel J.N., Jenkner H., Sturch C.R., McLean B.J., Shara M.M.; (1990) Astron. J. 99, 2019; The HST guide star catalogue, version 1.0; 1990AJ.....99.2019L