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TYC 5142-12-1 (TY Aql)


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The HR-diagram from HIPPARCOS data. Absolute magnitudes and kinematics of BP - AP stars
The HR-diagram of about 1000 Bp - Ap stars in the solar neighbourhoodhas been constructed using astrometric data from Hipparcos satellite aswell as photometric and radial velocity data. The LM method\cite{luri95,luri96} allows the use of proper motion and radial velocitydata in addition to the trigonometric parallaxes to obtain luminositycalibrations and improved distances estimates. Six types of Bp - Apstars have been examined: He-rich, He-weak, HgMn, Si, Si+ and SrCrEu.Most Bp - Ap stars lie on the main sequence occupying the whole width ofit (about 2 mag), just like normal stars in the same range of spectraltypes. Their kinematic behaviour is typical of thin disk stars youngerthan about 1 Gyr. A few stars found to be high above the galactic planeor to have a high velocity are briefly discussed. Based on data from theESA Hipparcos astrometry satellite and photometric data collected in theGeneva system at ESO, La Silla (Chile) and at Jungfraujoch andGornergrat Observatories (Switzerland). Tables 3 and 4 are onlyavailable in electronic form at the CDS via anonymous ftp tocdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html

Observations d'etoiles variables effectuees a l'Observatoire National d'Athenes EN 1960-1962.
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Takýmyýldýz:Kartal
Sað Açýklýk:19h15m07.73s
Yükselim:-07°00'49.2"
Görünürdeki Parlaklýk:10.923
özdevim Sað Açýklýk:-4.6
özdevim Yükselim:-2.5
B-T magnitude:11.089
V-T magnitude:10.937

Kataloglar ve belirtme:
Özgün isimleriTY Aql
TYCHO-2 2000TYC 5142-12-1
USNO-A2.0USNO-A2 0825-15039792
HIPHIP 94605

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