Trumpler 20

Number of stars per data source

	Reference  529 : 7158 stars
	Reference  551 : 13040 stars

References

 529
Platais I., Melo C., Fulbright J.P., Kozhurina-Platais V., Figueira P., Barnes S.A., Méndez R.A.
(2008) Mon. Not. R. Astron. Soc. 391, 1482
Trumpler 20 - an old and rich open cluster
2008MNRAS.391.1482P
 551
Carraro G., Costa E., Ahumada J.A.
(2010) Astron. J. 140, 954
Photometric Characterization of the Galactic Star Cluster Trumpler 20
2010AJ....140..954C