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HD 232624


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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.

Measurements of visual double stars made at PIC DU Midi and at Nice
Fifty visual measures of 37 very close binaries observed with the 2-mtelescope at Pic du Midi are presented together with 601 measures of 245close binaries observed with the 74-cm and 50-cm refractors at Nice. Allmeasurements were made by micrometer with illuminated wires. With the2-m telescope, binaries as close as 0.07 arcsec are separated, usingmagnifying powers from 2500 to 5000.

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Observation and Astrometry data

Constellation:Andromeda
Right ascension:02h15m21.18s
Declination:+50°44'02.6"
Apparent magnitude:9.403
Proper motion RA:6.8
Proper motion Dec:-6.2
B-T magnitude:10.538
V-T magnitude:9.497

Catalogs and designations:
Proper Names
HD 1989HD 232624
TYCHO-2 2000TYC 3306-284-1
USNO-A2.0USNO-A2 1350-02129181
HIPHIP 10498

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