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HD 215056


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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.

Mesures de vitesses radiales. VII. Accompagnement AU sol DU programme d'observation DU satellite Hipparcos. Radial velocities. VII. Ground based measurements for Hipparcos.
We publish 734 radial velocities of stars distributed in 28 fields of4x4deg. We continue the PPO series (Fehrenbach et al. 1987; Duflot etal. 1990 and 1992), using the Fehrenbach objective prism method.

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Observation and Astrometry data

Constellation:Pegasus
Right ascension:22h42m31.88s
Declination:+02°54'08.2"
Apparent magnitude:9.196
Proper motion RA:-17.8
Proper motion Dec:-8.4
B-T magnitude:9.615
V-T magnitude:9.231

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 215056
TYCHO-2 2000TYC 571-790-1
USNO-A2.0USNO-A2 0900-20209061
HIPHIP 112110
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