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HD 187099


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A photometric study of wide visual double stars with significant relative proper motion
Photometric observations and uvby H-beta indices of 142 wide visualdouble stars are presented. Calibrations of the indices are used toderive MK class, color excess, absolute magnitude, effectivetemperature, and distance. The results are used to check candidatesdouble stars for the Hipparcos mission for opticity.

CCD measurements of visual binaries
CCD measurements of visual double stars were obtained with the ESO 1.5 mdanish reflector. All binaries observed are candidates for the HIPPARCOSInput Catalogue. More than 400 observations have been made in four clearnights. The accuracy obtained is comparable to the accuracy of thephotographic technique, but the observing and reduction times are oneorder of magnitude smaller.

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观测天体数据

星座:望遠鏡座
右阿森松:19h50m10.84s
赤纬:-45°22'46.3"
视星:6.966
距离:180.505 天文距离
右阿森松适当运动:2.6
赤纬适当运动:-13.5
B-T magnitude:8.34
V-T magnitude:7.08

目录:
适当名称   (Edit)
HD 1989HD 187099
TYCHO-2 2000TYC 8390-496-1
USNO-A2.0USNO-A2 0375-38196975
HIPHIP 97593

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