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HD 13313

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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 d'etoiles doubles faites a Nice, etoiles doubles nouvelles (24eme serie) decouvertes a Nice. Table 1 gives 1182 measurements of 682 binaries observed with the 74 and50 cm refractors. Table 2 lists 26 new binaries discovered with the 50cm refractor.
Etoiles doubles nouvelles (6^{e} série). Découvertes à Nice avec la lunette de 50 CM Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972A&AS....5..167C&db_key=AST

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Observation and Astrometry data

Constellation:	Τρίγωνον
Right ascension:	02^h10^m46.61^s
Declination:	+30Â°04'41.8"
Apparent magnitude:	8.477
Distance:	182.149 parsecs
Proper motion RA:	-18.6
Proper motion Dec:	-13.8
B-T magnitude:	8.9
V-T magnitude:	8.512

Catalogs and designations:

Proper Names
HD 1989	HD 13313
TYCHO-2 2000	TYC 2309-623-1
USNO-A2.0	USNO-A2 1200-00920736
HIP	HIP 10169

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