NGC 6611

Number of stars per data source

	Reference    7 :    1 star
	Reference  100 :    1 star

References

 7

Johnson H.L.

(1965) Astrophys. J. 141, 923

Interstellar Extinction in the Galaxy

1965ApJ...141..923J

 100

Fernie J.D.

(1983) Astrophys. J. Suppl. 52, 7

New UBVRI Photometry for 900 Supergiants

1983ApJS...52....7F