NGC 957

Number of stars per data source

	Reference   33 :    1 star
	Reference  207 :    5 stars

References

 33

Johnson H.L., Morgan W.W.

(1955) Astrophys. J. 122, 429

Photometric and spectroscopic observations of the double cluster in Perseus

1955ApJ...122..429J

 207

Hoag A.A., Applequist L.

(1965) Astrophys. J. Suppl. 12, 215

Distance moduli of open clusters

1965ApJS...12..215H