IC 2157

Number of stars per data source

	Reference  128 :   26 stars
	Reference  226 : 2005 stars

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
226: Kharchenko N., Andruk V., Schilbach E.; (1997) Astron. Nachr. 318, 253; Schmidt survey in the galactic anticentre direction. 1. Investigation of open clusters; 1997AN....318..253K