Proper Motions, UBV Photometry, Four Open Clusters (Frolov 1980)

Details Proper Motions, UBV Photometry, Four Open Clusters (Frolov 1980) Proper Motions, UBV Photometry, Four Open Clusters (Frolov 1980)

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ycat.5028....0f&link_type=abstract

VizieR On-line Data Catalog: V/28. Originally published in: 1977IzPul.195...80F; 1979IzPul.196...69F

Astronomy and Astrophysics

Astronomy

Clusters: Open, Proper Motions, Photometry: Ubv, Regional Catalog

Scientific paper

Proper motions were determined for 2169 stars with limiting magnitude B = 16.5 mag and located within a 60x60' area centered at RA = 23h54.2min, Dec = 60deg57arcmin (1950.0). Three plate pairs with a mean epoch difference of 49 years were used. The first epoch plates were taken with the Tashkent normal astrograph during 1923-1925 and the second epoch plates with the Pulkovo normal astrograph. The proper motions have a mean error +/-0.0030 arcsec (B < 14.5 mag) and +/-0.0036 arcsec (B > 14.5 mag) and were measured relative to reference stars with 13.5 mag <= B <= 14.5 mag. Photographic UBV magnitudes were measured using Sandages photoelectric standards. The U, B and V magnitudes were determined for 1930, 2165 and 1734 stars respectively, with the corresponding mean errors +/-0.03 mag, +/-0.06 mag and +/-0.05 mag. In the measured area there are three known open clusters (NGC 7788, NGC 7790 and Berkeley 58) and a previously unknown open cluster, discovered by the author, centered at RA =23 h 54.9 min, Dec = 61 deg 21 arcmin (1950.0). The cluster members were selected on the basis of the proper motion (vector diagram) and photometric (V ~ B-V and U-B ~ B-V) criteria. Stars within areas with 4 arcmin radii centered on NGC 7788 and NGC 7790 and 6 arcmin radii centered on Berkeley 58 and the anonymous cluster were investigated for cluster membership. The method of reduction of the observational data and the results obtained have been published in Izv. Pulkovo 195, 80, 1977 and 196, 69, 1979. (1 data file).

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