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HD 54814


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New OB-Association in Pup - CMA
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Walraven photometry of nearby southern OB associations
Homogeneous Walraven (VBLUW) photometry is presented for 5260 stars inthe regions of five nearby southern OB associations: Scorpio Centaurus(Sco OB2), Orion OB1, Canis Major OB1, Monoceros OB1, and Scutum OB2.Derived V and (B - V) in the Johnson system are included.

Physical parameters of pulsating variables with periods between one and three days. I - Photometry and metallicities
Based on a new set of observations in the Walraven VBLUW system,obtained at the European Southern Observatory, La Silla, Chile,Fe/H(VBLU) values of 57 pulsating variables, mostly with periods betweenone and three days,. are determined. The distribution of the metalabundances is shown to be essentially bimodal. All the variables withFe/H ratios of less than -0.4 were classified by Diethelm (1983) as RRdstars. They are identified as the galactic field counterpart of theCepheids in the same period range found in globular clusters.

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Observation and Astrometry data

Constellation:おおいぬ座
Right ascension:07h09m35.13s
Declination:-19°06'55.9"
Apparent magnitude:7.989
Distance:2439.024 parsecs
Proper motion RA:-5.1
Proper motion Dec:4
B-T magnitude:7.891
V-T magnitude:7.981

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 54814
TYCHO-2 2000TYC 5972-2603-1
USNO-A2.0USNO-A2 0675-05035665
HIPHIP 34566

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