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HD 211644

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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.
Micrometer Measures of Double Stars Micrometer measures of 795 double stars made with the 26 inch (0.66 m)refractor of the US Naval Observatory from 1984 to 1990 are presented.
Micrometer Observations of Double Stars and New Pairs - Part Ten Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980ApJS...44..111H&db_key=AST
Mesures d'étoiles doubles faites au réfracteur de 38 cm de l'Observatoire de Nice Not Available

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Observation and Astrometry data

Constellation:	Eidechse
Right ascension:	22^h17^m20.25^s
Declination:	+50Â°48'33.3"
Apparent magnitude:	8.48
Distance:	269.542 parsecs
Proper motion RA:	10.8
Proper motion Dec:	0.4
B-T magnitude:	8.627
V-T magnitude:	8.493

Catalogs and designations:

Proper Names	(Edit)
HD 1989	HD 211644
TYCHO-2 2000	TYC 3618-2916-1
USNO-A2.0	USNO-A2 1350-16269734
HIP	HIP 110042

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