Pismis 20
Number of stars per data source
Reference 82 : 1 star
Reference 190 : 1 star
Reference 238 : 1 star
Reference 547 : 1 star
References
- 82
- Moffat A.F.J., Vogt N.
- (1973) Astron. Astrophys. Suppl. 10, 135
- Southern open star clusters III. UBV Hbeta photometry of 28 clusters between galactic longitudes 297 and 353
- 1973A&AS...10..135M
- 190
- Klare G., Neckel T.
- (1977) Astron. Astrophys. Suppl. 27, 215
- UBV Hbeta and polarization measurements of 1660 southern OB stars
- 1977A&AS...27..215K
- 238
- Muzzio J.C.
- (1979) Astron. J. 84, 639
- Photometric study of faint early-type stars in the southern Milky Way
- 1979AJ.....84..639M
- 547
- Winkler H.
- (1997) Mon. Not. R. Astron. Soc. 287, 481
- Red and infrared colours of B stars and the reddening law in the Galaxy
- 1997MNRAS.287..481W