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HD 172612


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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 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'etoiles doubles faites AU 38cm de l'Observatoire de Paris.
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观测天体数据

星座:天龍座
右阿森松:18h38m19.75s
赤纬:+53°53'06.6"
视星:8.43
距离:135.501 天文距离
右阿森松适当运动:62.2
赤纬适当运动:38.2
B-T magnitude:8.914
V-T magnitude:8.47

目录:
适当名称   (Edit)
HD 1989HD 172612
TYCHO-2 2000TYC 3905-2546-1
USNO-A2.0USNO-A2 1425-09231489
HIPHIP 91385

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