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HD 17325

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The rotation speed of the companion star in Aquila X-1. We have obtained medium resolution spectra of the neutron star X-raytransient Aql X-1 during quiescence. We determine the spectral type ofthe companion star to be K1 and also estimate its rotation speed to be62^+30^_-20_km/s. By measuring the width of the Hα emission lineprofile of the accretion disc, we estimate the binary inclination to~50° and also estimate the semi-amplitude of the companion star'sradial velocity curve to be ~170km/s.
Large and Kinematically Unbiased Samples of G- and K-Type Stars. III. Evolved Young Disk Stars in the Bright Star Sample Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1989PASP..101...54E&db_key=AST
Large and kinematically unbiased samples of G- and K-type stars. II - Observations of evolved stars in the Bright Star sample. III - Evolved young disk stars in the Bright Star sample Four color and RI observations were obtained for a large sample ofG-type and K-type stars in the Bright Star Catalogue. Data are firstpresented for 110 evolved stars. Photometry of evolved young diskpopulation stars have then been calibrated for luminosity, reddening,and metallicity on the basis of results for members of the Hyades andSirius superclusters. New DDO results are given for 120 stars.
Radial velocities of southern stars obtained with the photoelectric scanner CORAVEL. III - 790 late-type bright stars Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1985A&AS...59...15A&db_key=AST

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观测天体数据

星座:	波江座
右阿森松:	02^h45^m16.50^s
赤纬:	-46Â°17'14.0"
视星:	6.85
距离:	398.406 天文距离
右阿森松适当运动:	12.9
赤纬适当运动:	-5
B-T magnitude:	8.595
V-T magnitude:	6.977

目录:

适当名称	(Edit)
HD 1989	HD 17325
TYCHO-2 2000	TYC 8051-685-1
USNO-A2.0	USNO-A2 0375-00881645
BSC 1991	HR 822
HIP	HIP 12855

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