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HD 7470


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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.

New proper motion determination of Luyten catalogue stars (LTT) south of declination -40 degrees and right ascension between 00 H and 04 H 30 M
Data are given for 104 LTT stars found on 11 areas, covering 25 squaresdegrees each, south of declination -40 degrees and right ascensionbetween 00 h and 04 h 30 m. Three stars present differences in propermotion greater than 0.10 arcsec, six present differences in positionangle greater than 20 degrees and one presents those differences in bothvalues.

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Observation and Astrometry data

Constellation:きょしちょう座
Right ascension:01h13m28.48s
Declination:-60°14'31.1"
Apparent magnitude:9.703
Proper motion RA:146.9
Proper motion Dec:18.4
B-T magnitude:10.748
V-T magnitude:9.79

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 7470
TYCHO-2 2000TYC 8849-440-1
USNO-A2.0USNO-A2 0225-00320084
HIPHIP 5712

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