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HD 112459


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A homogeneous catalog of new UBV and H-beta photometry of B- and A-type stars in and around the Scorpius-Centaurus OB association
B- and A-type stars in and near the Sco-Cen OB association areinvestigated with UBV and H-beta photometry to acquire data relevant tothe luminosity function of Sco-Cen. The measurements generally consistof two 10-s integrations of U, B, V, (W, N) filters, and theobservations are corrected iteratively for atmospheric extinction andinstrumental response. The data presented give the mean V magnitude,mean B-V, mean U-B, and the estimated uncertainties for these values.The catalog provides a homogeneous catalog of data for a large fieldwith stellar objects delineating membership to the association Sco-Cenand that affect the luminosity function of the aggregate.

Stromgren and H-beta photometry of stars earlier than G0 in the Southern Coalsack direction
Four-color and H-beta photometry have been obtained for 236 starsearlier than G0 in order to study the color excess distribution in theSouthern Coalsack direction. The beta histogram of the stars reveals arelative absence of stars in the range of A4 to A9. The (b-y)distribution for B-type stars suggests the existence of three differenttypes of stars located at different distances.

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Observation and Astrometry data

Constellation:Centaure
Right ascension:12h57m46.29s
Declination:-63°39'24.8"
Apparent magnitude:8.718
Distance:255.102 parsecs
Proper motion RA:-24.2
Proper motion Dec:-9.2
B-T magnitude:9.351
V-T magnitude:8.771

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 112459
TYCHO-2 2000TYC 8993-786-1
USNO-A2.0USNO-A2 0225-15794317
HIPHIP 63260

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