Star clusters in the Carina complex: 
photometry of NGC 3114, Collinder 228 and vdB-Hagen 99*
1
Dipartimento di Astronomia, Universitá di Padova, vicolo dell'Osservatorio 5, 35122 Padova, Italy
2
European Southern Observatory, Karl-Schwartzschild-Str 2, 85748 Garching b. München, Germany
Corresponding author: G. Carraro, giovanni.carraro@unipd.it
Received:
15
December
2000
Accepted:
11
September
2001
In this paper we present and analyze CCD UBVRI photometry
in the region of the three young open clusters NGC 3114, Collinder 228, and vdB-Hagen 99,
located in the Carina spiral feature. NGC 3114 lies
in the outskirts of the Carina nebula. We found 7 star members
in a severely contaminated field, and obtain a distance of 950 pc
and an age less than 
yrs.
Collinder 228 is a younger cluster (8
yrs), located
in front of the Carina nebula complex, for which we identify 11 new
members and suggest that 30% of the stars are probably binaries.
As for vdB-Hagen 99, we add 4 new members, confirming that it
is a nearby cluster located at 500 pc from the Sun and projected toward the direction of the Carina spiral arm.
Key words: stars: evolution / stars: general / stars: Hertzsprung-Russel (HR) and C-M diagrams / galaxy: open clusters and associations: individual: NGC 3114 / galaxy: open clusters and associations: individual: Collinder 228 / galaxy: open clusters and associations: individual: vdB-Hagen 99
© ESO, 2001