Berkeley 23

Number of stars per data source

	Reference  303 : 1070 stars
	Reference  389 :  152 stars

References

 303
Ann H.B., Lee S.H., Sung H., Lee M.G., Kim S.-L., Chun M.-Y., Jeon Y.-B., Park B.-G., Yuk I.-S.
(2002) Astron. J. 123, 905
BOAO photometric survey of galactic open clusters. II. Physical parameters of 12 open clusters
2002AJ....123..905A
 389
Hasegawa T., Malasan H.L., Kawakita H., Obayashi H., Kurabayashi T., Nakai T., Hyakkai M., Arimoto N.
(2004) Publ. Astron. Soc. Japan 56, 295
New photometric data of old open clusters in the anti-galactic center region
2004PASJ...56..295H