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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.
| A survey for southern Delta Scuti variable stars Twenty-nine field stars have been tested photoelectrically forshort-period variability. Eighteen of these stars have spectral typesbetween A2 and F5 and are not Am stars; of these, six have beendiscovered to be variable and one is a suspected variable. HD 185969,with a period of 0.361 day, has the longest known period for a star ofthe Delta Scuti type. The predominance of discovered variables withamplitudes close to the detection limit is suggestive of most stars inthe instability strip being pulsators.
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Observation and Astrometry data
Constellation: | Compas |
Right ascension: | 13h59m58.41s |
Declination: | -65°32'31.6" |
Apparent magnitude: | 7.554 |
Distance: | 195.312 parsecs |
Proper motion RA: | -41.1 |
Proper motion Dec: | -11.2 |
B-T magnitude: | 7.734 |
V-T magnitude: | 7.569 |
Catalogs and designations:
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