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HD 232804


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Membership of low-mass stars in the open cluster Alpha Persei
The results of a combined astrometric, photometric, and spectroscopicsearch for low-mass members in the intermediate-age open cluster AlphaPersei are presented. Over 130 low-mass new members have been identifiedto M(v) about 12.5, almost doubling the previous number of knownmembers. The new membership information suggests a slight upwardrevision of Alpha Per's age to about 8 x 10 exp 7 yr. Alpha Per isnoticeably spatially elongated in a direction parallel to the Galacticplane, most likely due to tidal deformation. Analysis of thedistribution of relative H-alpha emission strengths among Alpha Permembers confirms the view that the mean H-alpha strength decreases inincreasingly older systems. Allowing for survey incompleteness, onecannot reject the idea that the luminosity function is consistent withthe field luminosity function to M(v) about 9 or 10.

Uvby-Beta Photometry for 67 Stars in the Region of Alpha-Persei
Abstract image available at:http://adsabs.harvard.edu/abs/1989A&AS...81...47T

Eigenbewegungen in der Umgebung von α Persei
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Observation and Astrometry data

Constellation:Perseus
Right ascension:03h32m31.89s
Declination:+51°29'22.6"
Apparent magnitude:10.293
Proper motion RA:21
Proper motion Dec:-22.6
B-T magnitude:11.019
V-T magnitude:10.353

Catalogs and designations:
Proper Names
HD 1989HD 232804
TYCHO-2 2000TYC 3324-799-1
USNO-A2.0USNO-A2 1350-03568070
HIPHIP 16506

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