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HD 224611

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The first BVR light curves and period analysis of the eclipsing binary V821 Cas The first BVR light curves of the eclipsing binary V821 Cas are used toderive the physical parameters of the system. The light curves wereobtained during 2000 and 2001 observational seasons at Ege UniversityObservatory (EUO). Period variation of the system was also investigated.For the first time apsidal motion elements of the system were obtainedfrom the O–C curve analyses. Preliminary absolute parameters ofthe components were computed taking into account the results of lightcurves analysis. Observational and theoretical internal structureconstants were estimated to belogk=-2.66andlogk=-2.42, respectively.
Photoelectric Minimum Times of Some Eclipsing Binary Stars We present 20 minima times of 8 eclipsing binaries.
First BVR Photometry of V821 Cassiopeiae Not Available
Mesures de vitesses radiales. VII. Accompagnement AU sol DU programme d'observation DU satellite Hipparcos. Radial velocities. VII. Ground based measurements for Hipparcos. We publish 734 radial velocities of stars distributed in 28 fields of4x4deg. We continue the PPO series (Fehrenbach et al. 1987; Duflot etal. 1990 and 1992), using the Fehrenbach objective prism method.

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Observation and Astrometry data

Constellation:	Cassiopeia
Right ascension:	23^h59^m11.91^s
Declination:	+53Â°33'47.4"
Apparent magnitude:	7.071
Distance:	88.81 parsecs
Proper motion RA:	-30.5
Proper motion Dec:	-13.5
B-T magnitude:	7.281
V-T magnitude:	7.089

Catalogs and designations:

Proper Names
HD 1989	HD 224611
TYCHO-2 2000	TYC 4001-292-1
USNO-A2.0	USNO-A2 1425-15892645
HIP	HIP 118259

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