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HD 12231


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Red giants in open clusters. VIII. NGC 752
The results of an 18-year radial-velocity survey of 30 red giants in thefield of the open cluster NGC 752 are presented. The membership of 15stars is confirmed. Four spectroscopic binaries have been discoveredamong the members and three orbits have been determined for H75, 110 and208, with periods of 3321, 127 and 5276 days respectively. The binaryfrequency (27%) is normal. A search for additional members in a widesurrounding area (2degr ) yielded two possible new members: both areclump red giant candidates. The red giant distribution in thecolour-magnitude diagram is somewhat unusual, with a clump containing 8stars and a second, fainter feature extending to the blue, defined by 3or 4 stars, which is not accounted for by theoretical isochrones. Basedon observations collected at the Haute-Provence Observatory (France)

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Observation and Astrometry data

Constellation:Andromède
Right ascension:02h00m56.39s
Declination:+38°41'02.8"
Apparent magnitude:8.243
Distance:371.747 parsecs
Proper motion RA:-5.7
Proper motion Dec:-17.4
B-T magnitude:10.041
V-T magnitude:8.392

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 12231
TYCHO-2 2000TYC 2829-55-1
USNO-A2.0USNO-A2 1275-01204107
HIPHIP 9413

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