NGC 6531

Number of stars per data source

	Reference    2 :   34 stars
	Reference  253 :  344 stars

References

 2

Hoag A.A., Johnson H.L., Iriarte B., Mitchell R.I., Hallam K.L., Sharpless S.

(1961) Publ. Us. Nav. Obs. XVII part VII, 347

Photometry of stars in galactic cluster fields

 253

Forbes D.

(1996) Astron. J. 112, 1073

Star formation in NGC 6531 - Evidence from age spread and initial mass function

1996AJ....112.1073F