NGC 663

Number of stars per data source

	Reference    6 :   42 stars

References

 6

Tapia M., Costero R., Echevarria J., Roth M.

(1991) Mon. Not. R. Astr. Soc. 253, 649

Near-infrared and Stroemgren photometry of the open clusters NGC 663, NGC 1502 and NGC 1893

1991MNRAS.253..649T