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HD 72183


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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.

Observations of Double Stars. XVIII.
Micrometer observations of 1350 pairs in 1995-1997 are listed.

Radial-velocity measurements. V - Ground support of the HIPPARCOS satellite observation program
The paper presents data on 1070 radial velocity measurements of starsdistributed in 39 fields measuring 4 deg x 4 deg. The PPO series ofFehrenbach et al. (1987) and Duflot et al. (1990) is continued using theFehrenbach objective prism method.

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Observation and Astrometry data

Constellation:Lynx
Right ascension:08h34m12.35s
Declination:+56°55'23.1"
Apparent magnitude:8.343
Distance:280.899 parsecs
Proper motion RA:-13.7
Proper motion Dec:-32.5
B-T magnitude:8.464
V-T magnitude:8.353

Catalogs and designations:
Proper Names
HD 1989HD 72183
TYCHO-2 2000TYC 3800-1842-1
USNO-A2.0USNO-A2 1425-07178455
HIPHIP 42046

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