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HD 154613


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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.

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.

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Osservazione e dati astrometrici

Costellazione:Ofiuco
Ascensione retta:17h07m36.55s
Declinazione:-27°43'51.9"
Magnitudine apparente:8.547
Distanza:303.951 parsec
Moto proprio RA:-4.5
Moto proprio Dec:-15.8
B-T magnitude:9.968
V-T magnitude:8.665

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 154613
TYCHO-2 2000TYC 6819-5750-1
USNO-A2.0USNO-A2 0600-24222858
HIPHIP 83804

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