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HD 149075


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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.

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Osservazione e dati astrometrici

Costellazione:Altare
Ascensione retta:16h34m38.00s
Declinazione:-46°31'34.9"
Magnitudine apparente:8.808
Distanza:274.725 parsec
Moto proprio RA:-1.2
Moto proprio Dec:-21.5
B-T magnitude:10.689
V-T magnitude:8.964

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 149075
TYCHO-2 2000TYC 8325-3783-1
USNO-A2.0USNO-A2 0375-27982914
HIPHIP 81164

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