Trumpler 20

Number of stars per data source

	Reference  479 : 1183 stars
	Reference  535 : 7166 stars
	Reference  549 : 13040 stars

References

 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

 535

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

 549

Carraro G., Costa E., Ahumada J.A.

(2010) Astron. J. 140, 954

Photometric Characterization of the Galactic Star Cluster Trumpler 20

2010AJ....140..954C