Pismis 20

Number of stars per data source

	Reference    1 :    1 star
	Reference   16 :    3 stars
	Reference  128 :   15 stars
	Reference  295 :    1 star

References

 1
Egret D.
(1986) Private Communication
Coordinates from SIMBAD (mainly SAO)
 16
Stephenson C.B., Sanduleak N.
(1971) Publ. Warner Swasey Obs. 1 no 1
Luminous stars in the southern Milky Way
 128
Lasker B.M., Russel J.N., Jenkner H., Sturch C.R., McLean B.J., Shara M.M.
(1990) Astron. J. 99, 2019
The HST guide star catalogue, version 1.0
1990AJ.....99.2019L
 295
Massey P., DeGioia-Eastwood K., Waterhouse E.
(2001) Astron. J. 121, 1050
The progenitor masses of Wolf-Rayet stars and luminous blue variables determined from cluster turnoffs. II. Results from 12 galactic clusters and OB associations
2001AJ....121.1050M