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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.

Photoelectric observations of lunar occultations. X
Photoelectric occulation results for 461 events observed during 15months are reported. They include 77 reappearances, 4 determinations ofangular diameter, 38 analyses of double or multiple stars including twopreviously unknown bright stars, and 8 previously known bright double ormultiple stars.

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Dades d'Observació i Astrometria

Constel·lació:Ophiucus
Ascensió Recta:16h55m06.38s
Declinació:-18°53'02.8"
Magnitud Aparent:7.766
Distancia:549.451 parsecs
Moviment propi RA:-1
Moviment propi Dec:-4.3
B-T magnitude:7.964
V-T magnitude:7.783

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 152603
TYCHO-2 2000TYC 6226-186-1
USNO-A2.0USNO-A2 0675-17005695
HIPHIP 82787

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