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HD 166415


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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.

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Observation and Astrometry data

Constellation:Ophiucus
Right ascension:18h10m23.26s
Declination:+02°31'46.2"
Apparent magnitude:8.708
Proper motion RA:-2.8
Proper motion Dec:-5.2
B-T magnitude:9.031
V-T magnitude:8.735

Catalogs and designations:
Proper Names
HD 1989HD 166415
TYCHO-2 2000TYC 435-4774-1
USNO-A2.0USNO-A2 0900-11844245
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