NGC 7209

Number of stars per data source

	Reference   61 :    1 star
	Reference   64 :    6 stars

References

 61

Svolopoulos S.N.

(1961) Astrophys. J. 134, 612

Spectral classification in some open clusters

1961ApJ...134..612S

 64

Svolopoulos S.N.

(1962) Astrophys. J. 136, 788

Spectral classifications in nine open clusters

1962ApJ...136..788S