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HD 149430

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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.
Measurements of double stars 1993.67 - 1998.13 624 Micrometer Measurements of 224 pairs with a 32.5 cm Cassegrain, 719Measurements of 310 double stars with a 360 mm Newtonian are given.Tables 1 to 4 are available in electronic form only at the CDS130.79.128.5 or via http://cdsweb.u-strasbg.fr/Abstract.html
Double Star Measurements Made at Nice Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1993A&AS..102..643M&db_key=AST
A Note about the Comparison Between the Old and New Slettebak Systems of Axial Rotational Velocities Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1984RMxAA...9....9G&db_key=AST
Rotational Velocities of Some B Stars Not Available

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观测天体数据

星座:	天龍座
右阿森松:	16^h31^m36.86^s
赤纬:	+57Â°45'50.7"
视星:	8.531
距离:	165.017 天文距离
右阿森松适当运动:	52.3
赤纬适当运动:	-28.5
B-T magnitude:	8.783
V-T magnitude:	8.552

目录:

适当名称
HD 1989	HD 149430
TYCHO-2 2000	TYC 3884-1836-1
USNO-A2.0	USNO-A2 1425-08544582
HIP	HIP 80934

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