Trumpler 18

Number of stars per data source

	Reference   32 :    3 stars
	Reference   38 :    3 stars
	Reference  119 :    1 star
	Reference  120 :    7 stars
	Reference  144 :    2 stars
	Reference  256 :    4 stars
	Reference  470 :    1 star
	Reference  487 :    1 star
	Reference  514 :    3 stars

References

32: Graham J.A.; (1970) Astron. J. 75, 703; The space distribution of OB-stars in Carina; 1970AJ.....75..703G
38: Graham J.A.; (1967) Mon. Not. R. Astr. Soc. 135, 377; Photoelectric Hbeta photometry in seven open clusters and in the Scorpio-Centaurus association; 1967MNRAS.135..377G
119: Deutschman W.A., Davis R.J., Schild R.E.; (1976) Astrophys. J. Suppl. 30, 97; The galactic distribution of interstellar absorption as determined from the Celescope catalog of ultraviolet stellar observations and a new catalog of UBV, Hbeta photoelectric observations; 1976ApJS...30...97D
120: Moffat A.F.J., Vogt N.; (1975) Astron. Astrophys. Suppl. 20, 125; Southern open clusters V. UBV Hbeta photometry of 20 clusters in carana; 1975A&AS...20..125M
144: Claria J.J.; (1976) Astron. J. 81, 155; Relation of NGC 3590, Hogg 10, and collinder 240 to the structure of the Carina spiral feature; 1976AJ.....81..155C
256: Johansson K.L.V.; (1980) Astron. Astrophys. Suppl. 41, 43; Colour excess and stellar distribution in five selected directions of the Milky Way in Carina, Crux, Centaurus and Norma; 1980A&AS...41...43J
470: Knude J.; (1992) Astron. Astrophys. Suppl. 92, 841; uvby Beta observations of 528 type B stars with V between the 8th and 9th magnitude; 1992A&AS...92..841K
487: Kaltcheva N.T., Georgiev L.N.; (1993) Monthly Notices Roy. Astron. Soc. 261, 847; Stromgren and HBeta photometry of OB associations and open clusters - II. Tr 16 and Car OB2; 1993MNRAS.261..847K
514: Shobbrook R.R., Lynga G.; (1994) Monthly Notices Roy. Astron. Soc. 269, 857; uvby - Beta photometry of 100 stars in the region of eta Carina; 1994MNRAS.269..857S