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HD 175951


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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:Corona Australis
Right ascension:18h59m41.45s
Declination:-40°37'21.8"
Apparent magnitude:7.717
Distance:238.663 parsecs
Proper motion RA:3.6
Proper motion Dec:-10.4
B-T magnitude:7.701
V-T magnitude:7.716

Catalogs and designations:
Proper Names
HD 1989HD 175951
TYCHO-2 2000TYC 7920-127-1
USNO-A2.0USNO-A2 0450-36463724
HIPHIP 93250

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