Astron. Astrophys. Suppl. Ser. 146, 251-258
Absolute proper motions of open clusters
I. Observational data
H. Baumgardt1 - C. Dettbarn2 - R. Wielen2
Send offprint request: H. Baumgardt
1 - Department of Mathematics and Statistics, University of Edinburgh,
Edinburgh EH9 3JZ, UK
Astronomisches Rechen-Institut Heidelberg, Mönchhofstraße
12-14, D-69120 Heidelberg, Germany
Received May 29; accepted July 17, 2000
Mean proper motions and parallaxes of 205 open clusters were determined from their member stars found in
the Hipparcos Catalogue. 360 clusters were searched for possible members,
excluding nearby clusters with distances D
< 200 pc. Members were selected using
ground based information (photometry, radial velocity, proper motion, distance from
the cluster centre) and information provided by Hipparcos (proper motion, parallax).
Altogether 630 certain and 100 possible members were found.
A comparison of the Hipparcos parallaxes with photometric distances
of open clusters shows good agreement. The Hipparcos data
confirm or reject the membership of several Cepheids in the studied clusters.
Key words: Galaxy: open clusters and associations: general -- Astrometry -- stars: variables: Cepheids
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