NGC 6611
Number of stars per data source
Reference 97 : 1 star
Reference 169 : 10 stars
References
- 97
- Bosch G.L., Morrell N.I., Niemela V.S.
- (1999) Rev. Mex. Astron. Astrofis. 35, 85
- Stellar spectroscopy in NGC 6611: binary frequency and new spectral types of several early type stars
- 1999RMxAA..35...85B
- 169
- Sana H., Gosset E., Evans C.J.
- (2009) Mon. Not. R. Astron. Soc. 400, 1479
- The massive star binary fraction in young open clusters - II. NGC6611 (Eagle Nebula)
- 2009MNRAS.400.1479S