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HD 100650


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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.

SANTIAGO 91, a right ascension catalogue of 3387 stars (equinox J2000).
The positions in right ascension of 3387 stars belonging to the Santiago67 Catalogue, observed with the Repsold Meridian Circle at Cerro Calan,National Astronomical Observatory, during the period 1989 to 1994, aregiven. The average mean square error of a position, for the wholeCatalogue, is +/-0.009 s. The mean epoch of the catalogue is 1991.84.

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Observation and Astrometry data

Constellation:Hydra
Right ascension:11h34m48.30s
Declination:-32°26'37.4"
Apparent magnitude:8.924
Distance:111.235 parsecs
Proper motion RA:-46.7
Proper motion Dec:27
B-T magnitude:9.513
V-T magnitude:8.973

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 100650
TYCHO-2 2000TYC 7220-281-1
USNO-A2.0USNO-A2 0525-14250413
HIPHIP 56484

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