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Volume 133 / No 1 (November II 1998)

Astron. Astrophys. Suppl. Ser., 133 1 (1998) 25-28

Abstract

Free Access

Issue		Astron. Astrophys. Suppl. Ser. Volume133, Number1, November II 1998


Page(s)		25 - 28
DOI		https://doi.org/10.1051/aas:1998453
Published online		15 November 1998

Astron. Astrophys. Suppl. Ser.133, 25-28 (1998)

CCD photometry of distant open clusters^*,^**

IV. Trumpler 5

J. Kaluzny

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 presentBVI 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 $(m-M)_{0}$ and reddening $E(B-V)$ are estimatedat 12.4 and 0.58, respectively. These values were obtained for the assumedsolar metallicity of the cluster. Our data indicate that Tr 5 is one of the richest objects among the sample of known oldopen clusters. The total mass included only in upper-main sequence starsexceeds 3000 $m_{\odot}$ . The angular diameter of the cluster is estimatedat 11.6 arcmin, which corresponds to a linear size of about 20 pc foran estimated distance $d\approx 3.0$ kpc.

Key words:open clusters and associations: individual: Trumpler 5 / HR diagram

The data presented in Fig. 1 are available in electronicform 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 ScienceFoundation.

Tables at the CDS

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CCD photometry of distant open clusters*,**

IV. Trumpler 5

CCD photometry of distant open clusters^*,^**