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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
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Some New Possible Variable Stars
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Mikrometermessungen von Doppelsternen. III
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Mesures d'étoiles doubles effectuées au réfracteur de 38 cm de l' Observatoire de Nice
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Observation and Astrometry data

Constellation:ぎょしゃ座
Right ascension:04h56m42.81s
Declination:+39°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 1989HD 31342
TYCHO-2 2000TYC 2894-400-1
USNO-A2.0USNO-A2 1275-04022569
HIPHIP 22979
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