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HD 91507


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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.

The chemical evolution of the solar neighborhood. I - A bias-free reduction technique and data sample
The possible ways of measuring the age-metallicity relation for thegalactic disk in the neighborhood of the sun are discussed. It is shownthat the use of a field star sample chosen on the basis of effectivetemperature introduces a bias which results in a monotonic increase inthe metal abundance of the disk with time. However, if theage-metallicity relation for the disk can be shown to satisfy certaincriteria, the bias introduced in such a sample can be neglected: thegalactic disk apparently satisfies the criteria. It is concluded that asample analyzed through the use of uvby and H(beta) photometry inconjunction with a self-consistent set of theoretical isochronesprovides the least biased, most accurate estimate of the age-metallicityrelation for the disk.

Relative radial velocities from objective prism spectra in the region of nine southern open star clusters and a star field at Eta Carinae
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980A&AS...41..245G&db_key=AST

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Observation and Astrometry data

Constellation:りゅうこつ座
Right ascension:10h32m27.74s
Declination:-59°51'57.0"
Apparent magnitude:7.776
Distance:267.38 parsecs
Proper motion RA:-13.4
Proper motion Dec:-7.3
B-T magnitude:8.111
V-T magnitude:7.804

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 91507
TYCHO-2 2000TYC 8613-355-1
USNO-A2.0USNO-A2 0300-09929332
HIPHIP 51601
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