Astronomy & Astrophysics

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Issue		A&A Volume 401, Number 2, April II 2003
Page(s)		531 - 541
Section		Stellar clusters and associations
DOI		10.1051/0004-6361:20030112

A&A 401, 531-541 (2003)
DOI: 10.1051/0004-6361:20030112

Memberships and CM diagrams of the open cluster NGC $\,$ 7243

E. G. Jilinski^{1, 2, 3}, V. N. Frolov¹, J. K. Ananjevskaja¹, J. Straume⁴ and N. A. Drake^{2, 5}

¹ Main Astronomical Observatory, Pulkovo, St. Petersburg, Russia
² Observatório Nacional/MCT, Rua Gal. Jose Cristino 77, São Cristovão, Rio de Janeiro, Brazil
³ Laboratório Nacional de Computação Científica/MCT, Petropolis, Brazil
⁴ Radioastrophysical Observatory, Baldone, Riga, Latvia
⁵ Sobolev Astronomical Institute of St. Petersburg State University, St. Petersburg, Russia

(Received 16 November 1999 / Accepted 6 January 2003)

Abstract
The results of astrometric and photometric investigations of the open cluster NGC $\,$ 7243 are presented. Proper motions of 2165 stars with root-mean-square error of $1.1\;{\rm mas\,yr^}$ were obtained by means of PDS scanning of astrometric plates covering 97 years. A total of 211 cluster members down to $V=15.5\;$ mag have been identified. V and B magnitudes have been determined for 2118 and 2110 stars respectively. Estimations of mass ( $348~ {M_\odot} \le M_{\rm TOT} \le 522 ~{M_\odot}$ ), age $(t=2.5\times 10^8\,$ yr), distance $(r=698\,$ pc) and reddening (E_B-V=0.24) of the cluster NGC $\,$ 7243 have been made.

Key words: open clusters and associations: general -- open clusters and associations: individual: NGC $\,$ 7243

Offprint request: E. G. Jilinski, jilinski@on.br

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Memberships and CM diagrams of the open cluster NGC 7243

Memberships and CM diagrams of the open cluster NGC $\,$ 7243