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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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Osservazione e dati astrometrici

Costellazione:Eridano
Ascensione retta:02h45m16.50s
Declinazione:-46°17'14.0"
Magnitudine apparente:6.85
Distanza:398.406 parsec
Moto proprio RA:12.9
Moto proprio Dec:-5
B-T magnitude:8.595
V-T magnitude:6.977

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 17325
TYCHO-2 2000TYC 8051-685-1
USNO-A2.0USNO-A2 0375-00881645
BSC 1991HR 822
HIPHIP 12855
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