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HD 139298


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A large, complete, volume-limited sample of G-type dwarfs. I. Completion of Stroemgren UVBY photometry
Four-colour photometry of potential dwarf stars of types G0 to K2,selected from the Michigan Spectral Catalogues (Vol. 1-3), has beencarried out. The results are presented in a catalogue containing 4247uvby observations of 3900 stars, all south of δ = -26deg. Theoverall internal rms errors of one observation (transformed to thestandard system) of a program star in the interval 8.5 < V < 10.5are 0.0044, 0.0021, 0.0039, and 0.0059, respectively, in V, b-y, m_1_ ,and c_1_. The purpose of the catalogue, combined with earliercatalogues, is to allow selection of a large, complete, volume-limitedsample of G- and K-type dwarfs, investigate their metallicitydistribution, and compare it to predictions of various models ofgalactic chemical evolution. Future papers in this series will discussthese subjects.

A survey of stars with composite spectra.
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Observation and Astrometry data

Constellation:じょうぎ座
Right ascension:15h40m21.55s
Declination:-59°08'11.5"
Apparent magnitude:8.227
Distance:273.973 parsecs
Proper motion RA:-3.6
Proper motion Dec:-7.9
B-T magnitude:9.945
V-T magnitude:8.369

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 139298
TYCHO-2 2000TYC 8708-674-1
USNO-A2.0USNO-A2 0300-24282275
HIPHIP 76753

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