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HD 45673

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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.
Mikrometermessungen von Doppelsternen. VI. Not Available
Mesures d'étoiles doubles faites au 0,38 m de l'Observatoire de Paris. Not Available
Measures of 313 doubles stars. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1963AJ.....68..114W&db_key=AST
Measures of 266 double stars. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1957AJ.....62..153W&db_key=AST

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Osservazione e dati astrometrici

Costellazione:	Gemelli
Ascensione retta:	06^h29^m18.42^s
Declinazione:	+12Â°32'51.4"
Magnitudine apparente:	8.5
Distanza:	909.091 parsec
Moto proprio RA:	-0.1
Moto proprio Dec:	-8.4
B-T magnitude:	8.672
V-T magnitude:	8.515

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 45673
TYCHO-2 2000	TYC 740-296-1
USNO-A2.0	USNO-A2 0975-03310125
HIP	HIP 30914

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