King 20
Number of stars per data source
Reference 385 : 110 stars
Reference 524 : 648 stars
Reference 540 : 518 stars
References
- 385
- Skrutskie M.F., Cutri .M., Weinberg M.D., Schneider S., Carpenter J.M., et al.
- (2006) Astron. J. 131, 1163
- The Two Micron All Sky Survey (2MASS)
- 2006AJ....131.1163S
- 524
- Zacharias N., Monet D.G., Levine S.E., Urban S.E., Gaume R., Wycoff G.L.
- (2005) The Naval Observatory
- The Naval Observatory Merged Astrometric Dataset (NOMAD)
-
- 540
- Glushkova E.V., Zabolotskikh M.V., Koposov S.E., Spiridonova O.I., Vlasyuk V.V., Rastorguev A.S.
- (2010) Astron. Lett. 36, 14
- Photometry of the poorly studied galactic open star clusters King 13, King 18, King 19, King 20, NGC 136, and NGC 7245
- 2010AstL...36...14G