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HD 117850


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VRI photometry of wide double stars with A- type primaries.
We are presenting VRI photometry of 93 wide visual double stars havinglate B- or A- type primaries, taken from the Annex of Double andMultiple Stars of the HIPPARCOS Input Catalogue. Spectral types havebeen estimated for most of the primaries and for the majority of thesecondaries. 40% of them probably have common origin components, forwhich we calculated photometric parallaxes and some orbital valuesestimates.

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:半人馬座
右阿森松:13h33m45.07s
赤纬:-38°15'29.3"
视星:8.161
距离:283.286 天文距离
右阿森松适当运动:5.9
赤纬适当运动:1.7
B-T magnitude:8.289
V-T magnitude:8.172

目录:
适当名称   (Edit)
HD 1989HD 117850
TYCHO-2 2000TYC 7788-1557-1
USNO-A2.0USNO-A2 0450-15882683
HIPHIP 66163

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