NGC 2506

Number of stars per data source

	Reference  163 :  857 stars
	Reference  284 :  590 stars

References

 163

Marconi G., Hamilton D., Tosi M., Bragaglia A.

(1997) Mon. Not. R. Astron. Soc. 291, 763

Old open clusters: UBGVRI photometry of NGC 2506

1997MNRAS.291..763M

 284

Kim S.L., Chun M.-Y., Park B.-G., Kim S.C., Lee S.-H., Lee M.G., Ann H.B., Sung H., Jeon Y.-B., Yuk I.-S.

(2001) Acta Astron. 51, 49

Search for variable stars in two old open clusters: NGC 2506 and NGC 2420

2001AcA....51...49K