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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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Observation and Astrometry data

Constellation:Télescope
Right ascension:19h50m10.84s
Declination:-45°22'46.3"
Apparent magnitude:6.966
Distance:180.505 parsecs
Proper motion RA:2.6
Proper motion Dec:-13.5
B-T magnitude:8.34
V-T magnitude:7.08

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 187099
TYCHO-2 2000TYC 8390-496-1
USNO-A2.0USNO-A2 0375-38196975
HIPHIP 97593

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