Proper motions in M 67 (Zhao+ 1993)

Details Proper motions in M 67 (Zhao+ 1993) Proper motions in M 67 (Zhao+ 1993)

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ycat..41000243z&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/100/243. Originally published in: 1993A&AS..100..243Z

Astronomy and Astrophysics

Astronomy

Clusters: Open, Proper Motions

Scientific paper

Relative proper motions and membership probabilities of 1046 stars in the open cluster M67 are are determined from PDS measurements of 9 plate pairs taken with the double astrograph at the Zo-Se station Shanghai Observatory, which has an aperture of 40cm, a focal length of 6.9m and a scale of 30"/mm. The number of stars with membership probabilities higher than 0.8 and at a distance less than 45' from the field center is 282. The average standard errors of proper motions vary from +/-0.0004"/yr for bright stars in the inner part of the field to some +/-0.0015"/yr for faint stars in the outer part of the cluster. It is shown by a detailed discussion that the proper motions and membership probabilities of the stars determined in this paper are in quite satisfactory agreement wit those obtained by Sanders (1977A&AS...27...89S) or Girard et al. (1989AJ.....98..227G).
(1 data file).

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