| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 133, Number 1, November II 1998
|
|
|---|---|---|
| Page(s) | 25 - 28 | |
| DOI | https://doi.org/10.1051/aas:1998453 | |
| Published online | 15 November 1998 | |
CCD photometry of distant open clusters*,**
IV. Trumpler 5
Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
Send offprint request to: J. Kaluzny
Received:
21
April
1998
Accepted:
13
May
1998
Abstract
We present BVI photometry for Trumpler 5, a rich
open cluster located in the Galactic anticenter.
The cluster age is slightly lower than the age of M 67.
Its distance modulus 
and reddening 
are estimated
at 12.4 and 0.58, respectively. These values were obtained for the assumed
solar metallicity of the cluster. Our data indicate that Tr 5 is
one of the richest objects among the sample of known old
open clusters. The total mass included only in upper-main sequence stars
exceeds 3000 
. The angular diameter of the cluster is estimated
at 11.6 arcmin, which corresponds to a linear size of about 20 pc for
an estimated distance 
kpc.
Key words: open clusters and associations: individual: Trumpler 5 / HR diagram
The data presented in Fig. 1 are available in electronic form at the CDS, via ftp 130.79.128.5.
Visiting Astronomer, Kitt Peak National Observatory. KPNO is operated by AURA, Inc., under contract with the National Science Foundation.
© European Southern Observatory (ESO), 1998