SIMBAD references

The results of a complex study of the galactic open cluster Trumpler2 are presented. In order to obtain the proper motions, the positions of approximately 3000 stars up to the limit magnitude B∼16.25 mag in the area 80'x80' around the cluster were measured on 6 plates with a maximal epoch difference of 63-years. The root-mean error of the relative proper motions is 4.2mas/yr. The catalogue of BV magnitudes of all the stars in the investigated area was compiled. The selection of the cluster members within the region of R<16' from the center of the cluster was made. Altogether, 148 stars were considered to be cluster members by both astrometrical and photometrical criteria. We present the estimated age (8.91x10⁷yr) and physical parameters of the cluster and append the catalogues of the proper motions and of the photometry of the stars.