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TYC 1987-1106-1


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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.

Further Studies of A-Stars and F-Stars in the Region of the North Galactic Pole - Part Three - a Catalogue of Star Names and Positions
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Observation and Astrometry data

Constellation:Lion
Right ascension:11h53m39.21s
Declination:+26°25'39.8"
Apparent magnitude:10.236
Proper motion RA:-8.7
Proper motion Dec:-4.9
B-T magnitude:10.852
V-T magnitude:10.287

Catalogs and designations:
Proper Names
TYCHO-2 2000TYC 1987-1106-1
USNO-A2.0USNO-A2 1125-06403807
HIPHIP 57989
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