J/A+AS/105/15 J/A+AS/105/15 Proper motions of stars in the region of open cluster K P Tian J -L Zhao F Van Leeuwen Astron. Astrophys. Suppl. Ser. 105 15 1994 1994A&AS..105...15T astrometry open clusters and associations: individual (NGC 2286) Relative proper motions, their corresponding observed errors and membership probabilities of 2400 stars in the open cluster NGC 2286 region are determined from ASTROSCAN measurements of 8 plates made at Leiden Observatory. The plates have the maximum epoch difference of some 70 years and were taken with the double astrograph at Zo-Se station of Shanghai Observatory, which has an aperture of 40 cm, a focal length of 6.9 m and a scale of 30 arcsec/mm. The number of stars with membership probabilities higher than 0.7 and radial distances from the cluster centre less than 12' is 90. The average standard errors of proper motions vary from +/-0.0007"/yr for bright stars in the inner part of the field to some +/-0.0016"/yr for faint stars in the outer part of the field, and are statistically dependent on the number of measured plates per star. It is found from an analysis of the surface number density distribution of cluster members that the angular radius of NGC 2286 is some 12' and the corresponding linear radius 4.5 pc.

No Ordinal number of stars --- ID Identification numbers in the Li's catalogue --- X X coordinates cm Y Y coordinates cm n_B An * indicates that the photographic magnitude is taken from Chicarini --- B Photographic magnitude mag BL Magnitudes of stars listed in Li's catalogue mag MuX X-proper motion (arcsec/century) 10mas/yr e_MuX Observed error of X-proper motion 10mas/yr MuY Y-proper motion (arcsec/century) 10mas/yr e_MuY Observed error of Y-proper motion 10mas/yr P Proper motion membership probabilities % W Numbers of measured plates of stars --- Patricia Bauer CDS 1994Jan19 J_A+AS_105_15.xml