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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.
| Interstellar reddening in the Southern Hemisphere. I - The UVBY beta observations
The uvby-beta photometric data obtained from a Southern Hemisphereobservational project is presented. A uvby-beta photometric network ofnearly 3900 A and early F stars has been established with the intentthat the stars serve as 'space probes' for measurements of interstellarreddening.
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Observation and Astrometry data
| Constellation: | Centaurus |
| Right ascension: | 12h55m54.36s |
| Declination: | -53°06'19.1" |
| Apparent magnitude: | 8.271 |
| Distance: | 111.982 parsecs |
| Proper motion RA: | -72.7 |
| Proper motion Dec: | 22.7 |
| B-T magnitude: | 8.609 |
| V-T magnitude: | 8.299 |
Catalogs and designations:
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