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HD 31342

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New Elements for 80 Eclipsing Binaries IV. This research presents new elements for 80 eclipsing binaries found withthe help of the ASAS-3, Hipparcos and NSVS databases.
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.
Some Non-Variable Stars Not Available
Some New Possible Variable Stars Not Available
Mikrometermessungen von Doppelsternen. III Not Available
Mesures d'étoiles doubles effectuées au réfracteur de 38 cm de l' Observatoire de Nice Not Available

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Observation and Astrometry data

Constellation:	Auriga
Right ascension:	04^h56^m42.81^s
Declination:	+39Â°17'23.2"
Apparent magnitude:	9.721
Proper motion RA:	-3.6
Proper motion Dec:	-8.6
B-T magnitude:	9.969
V-T magnitude:	9.742

Catalogs and designations:

Proper Names	(Edit)
HD 1989	HD 31342
TYCHO-2 2000	TYC 2894-400-1
USNO-A2.0	USNO-A2 1275-04022569
HIP	HIP 22979

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