NGC 188

Number of stars per data source

	Reference  194 :  750 stars
	Reference  404 : 3027 stars
	Reference  455 :  525 stars

194: von Hippel T., Sarajedini A.; (1998) Astron. J. 116, 1789; WIYN open cluster study. I. Deep photometry of NGC 188; 1998AJ....116.1789V
404: Stetson P.B., McClure R.D.; (2004) Publ. Astron. Soc. Pacific 116, 1012; A star catalog for the open cluster NGC 188; 2004PASP..116.1012S
455: Krusberg Z.A.C., Chaboyer B.; (2006) Astron. J. 131, 1565; UBVI CCD Photometry of the Old Open Cluster Berkeley 17; 2006AJ....131.1565K