NGC 6531
Number of stars per data source
Reference 191 : 356 stars
Reference 326 : 38 stars
Reference 368 : 637 stars
Reference 370 : 12 stars
Reference 479 : 112 stars
References
- 191
- Skiff B.
- (1998) Priv. Comm.
- Coordinates from the GSC and USNO-A1.0 catalogues in the field of open clusters
-
- 326
- Hog E., Fabricius C., Makarov V.V., Urban S., Corbin T., Wycoff G., Bastian U., Schwekendiek P., Wicenec A.
- (2000) Astron. Astrophys. 357, L27
- The Tycho-2 Catalogue
- 2000A&A...355L..27H
- 368
- Park B.-G., Sung H., Kang Y.H.
- (2001) J. Korean Astron. Soc. 34, 149
- The galactic open cluster NGC 6531 (M21)
- 2001JKAS...34..149P
- 370
- Zacharias N., Urban S.E., Zacharias M.I., Wycoff G.L., Hall D.M., Monet D.G., Rafferty T.J.
- (2004) Astron. J. 127, 3043
- The Second U.S. Naval Observatory CCD Astrograph Catalog (UCAC2)
- 2004AJ....127.3042Z
- 479
- McSwain M.V., Gies D.R.
- (2005) Astrophys. J. Suppl. 161, 118
- The Evolutionary Status of Be Stars: Results from a Photometric Study of Southern Open Clusters
- 2005ApJS..161..118M