NGC 1647

Number of stars per data source

	Reference   64 :    8 stars
	Reference  207 :    2 stars
	Reference  314 :   23 stars

References

 64

Svolopoulos S.N.

(1962) Astrophys. J. 136, 788

Spectral classifications in nine open clusters

1962ApJ...136..788S

 207

Hoag A.A., Applequist L.

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

Distance moduli of open clusters

1965ApJS...12..215H

 314

Massey P., Johnson J.

(1993) Astron. J. 105, 980

Massive stars near Eta Carinae: the stellar content of Tr 14 and Tr 16

1993AJ....105..980M