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HD 124176


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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 photometric study of southern AP stars having right ascensions on the order of 12 HR
The color variability periods of some southern Ap stars were determinedfrom uvby measurements. Observations were made of 25 Sex, HR 4327, betaHya, HD 112381, HR 4965, HR 5158, HR 5269, and HD 125630. Data wereinsufficient for determinations of the periods of the stars HR 4109(which may not vary), l Cen, and the v and y variations of HD 125630.The occurrences of short duration dips in the color variation curves ofseveral of the objects are discussed.

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Dades d'Observació i Astrometria

Constel·lació:Centaurus
Ascensió Recta:14h12m55.10s
Declinació:-40°50'00.6"
Magnitud Aparent:6.746
Distancia:182.482 parsecs
Moviment propi RA:-19.3
Moviment propi Dec:-8.3
B-T magnitude:6.738
V-T magnitude:6.746

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 124176
TYCHO-2 2000TYC 7808-2597-1
USNO-A2.0USNO-A2 0450-17103137
HIPHIP 69429

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