Other
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ycat.1212....0k&link_type=abstract
VizieR On-line Data Catalog: I/212. Originally published in: 1995BICDS..46....9K; 1995AJ....109..672K
Other
Clusters: Open, Positional Data, Proper Motions, Magnitudes: Photographic
Scientific paper
A catalogue of positions, proper motions and photographic BV magnitudes for 2711 stars in and around the open cluster NGC 3680 is presented. The Catalogue is complete down to B=17.5 mag in a rectangular, one square degree area centered on the cluster. The limiting magnitude of the Catalogue is B=18.4 mag. The mean standard error of the proper motions for well-measured stars is +/-0.35 mas/yr. The photographic B and V magnitudes are accurate to about +/-0.1 mag. The mean error of the relative positions for all 2711 is +/-0.025 arcsec at the mean epoch of the plate material, 1977.8. For each star, three different cluster membership estimators are presented. For convenience, cross-identifications to other studies are provided. (2 data files).
Cannon Russell D.
Girard Terrence M.
Ianna Philip A.
Kozhurina-Platais Vera
Platais Imants
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