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HD 9221


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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.

ICCD Speckle Observations of Binary Stars. XIII. Measurements During 1989- 1994 From the Cerro Tololo 4 M Telescope
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996AJ....111..936H&db_key=AST

7th list of new Southern double stars found at the Lamont-Hussey Observatory of the University of Michigan at Bloemfontein, South Africa.
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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Anka
Sað Açýklýk:01h29m37.07s
Yükselim:-52°29'50.2"
Görünürdeki Parlaklýk:9.169
özdevim Sað Açýklýk:22.4
özdevim Yükselim:12.5
B-T magnitude:10.347
V-T magnitude:9.267

Kataloglar ve belirtme:
Özgün isimleri
HD 1989HD 9221
TYCHO-2 2000TYC 8039-660-1
USNO-A2.0USNO-A2 0375-00460961
HIPHIP 6962
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