NGC 2506

Number of stars per data source

	Reference  126 :   38 stars
	Reference  821 :    7 stars

References

 126

McClure R.D., Twarog B.A., Forrester W.T.

(1981) Astrophys. J. 243, 841

The old open cluster NGC 2506 and its similarity to NGC 2420

1981ApJ...243..841M

 821

Purgathofer A.

(1964) Ann. Univ. Sternw. Wien 26 no 2

Dreifarben Photometrie in offenen Sternhaufen sowie in zwei Sternfelden in Cygnus