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HD 40362


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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.

Spectral absolute magnitudes of 312 stars of the B5-A3 spectral classes in the region of the association Cygnus OB4
Observations of the region of the association Cygnus OB4 were made witha 70-cm meniscus telescope with an 8 deg objective prism and adispersion of 166 A/mm at H-gamma. The equivalent widths of the H-gammaand H-delta lines were measured and a reduction was performed withKopylov's system of equivalent widths using a number of standard stars.The absolute magnitudes of 312 stars of the B5-A3 spectral classes arederived. The positions of these stars in the H-R diagram are discussed.A table of the absolute magnitudes, spectral types, and luminosityclasses is given.

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Observation and Astrometry data

Constellation:Peintre
Right ascension:05h55m43.51s
Declination:-48°56'33.7"
Apparent magnitude:8.612
Distance:384.615 parsecs
Proper motion RA:-20.6
Proper motion Dec:44.3
B-T magnitude:10.25
V-T magnitude:8.748

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 40362
TYCHO-2 2000TYC 8096-1550-1
USNO-A2.0USNO-A2 0375-02211588
HIPHIP 28037

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