NGC 6520
Number of stars per data source
Reference 32 : 322 stars
Reference 441 : 8261 stars
References
- 32
- Kjeldsen H., Frandsen S.
- (1991) Astron. Astrophys. Suppl. 87, 119
- Stellar photometric stability. II. Age and distances for 13 open clusters with time series observations
- 1991A&AS...87..119K
- 441
- Carraro G., Mendez R.A., May J., Mardones D.
- (2005) Astron. J. 130, 635
- The open cluster NGC 6520 and the nearby dark molecular cloud Barnard 86
- 2005AJ....130..635C