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HD 139121


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Two-colour photometry for 9473 components of close Hipparcos double and multiple stars
Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.

Walraven photometry of nearby southern OB associations
Homogeneous Walraven (VBLUW) photometry is presented for 5260 stars inthe regions of five nearby southern OB associations: Scorpio Centaurus(Sco OB2), Orion OB1, Canis Major OB1, Monoceros OB1, and Scutum OB2.Derived V and (B - V) in the Johnson system are included.

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观测天体数据

星座:天秤座
右阿森松:15h37m11.91s
赤纬:-23°39'05.3"
视星:9.34
距离:1785.714 天文距离
右阿森松适当运动:-15.5
赤纬适当运动:-10.6
B-T magnitude:10.511
V-T magnitude:9.437

目录:
适当名称   (Edit)
HD 1989HD 139121
TYCHO-2 2000TYC 6764-841-1
USNO-A2.0USNO-A2 0600-18384475
HIPHIP 76479

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