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HD 138821


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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.

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观测天体数据

星座:天秤座
右阿森松:15h35m11.32s
赤纬:-21°00'28.3"
视星:8.801
距离:192.678 天文距离
右阿森松适当运动:-13
赤纬适当运动:-8.2
B-T magnitude:9.161
V-T magnitude:8.831

目录:
适当名称   (Edit)
HD 1989HD 138821
TYCHO-2 2000TYC 6196-847-1
USNO-A2.0USNO-A2 0675-14413932
HIPHIP 76302

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