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Sottometti un nuovo articolo| 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.
 
 
 |  | Photographic observations of visual double stars Photographic observations of 238 pairs of visual binaries obtained on770 plates using the 60-cm visual refractor of Bosscha Observatory(Lembang, Java) during 1976-1979 are reported, continuing the catalog ofvan Albada-van Dien (1983). The data-reduction procedures are brieflydescribed, and the data are presented in a table.
 
 
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| Costellazione: | Ofiuco |  | Ascensione retta: | 16h49m02.02s |  | Declinazione: | -19°36'19.1" |  | Magnitudine apparente: | 9.486 |  | Moto proprio RA: | 30.2 |  | Moto proprio Dec: | -8.5 |  | B-T magnitude: | 10.045 |  | V-T magnitude: | 9.533 |  Cataloghi e designazioni:
 
 
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