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HD 201759


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Pulkovo compilation of radial velocities for 35495 stars in a common system.
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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.

Catalogue of proper motions in the declination of stars of the Moscow zenith zone.
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The photometric study of an early-type reverse Algol system - V1425 Cygni
New UBV observations of V1425 Cyg were obtained, showing that the systemconsists of two B-type components exhibiting Beta Lyrae-type lightcurves. An improved orbital period of 1.2523879 for the system isdetermined. Preliminary photometric parameters for a Delta V light curveare derived and photometric analyses are made. The mass ratio of thesystem is derived from a q-search procedure. Two almost identicalsolutions wth similar q are obtained: one with a detached configuration,where the hot component is only slightly detached from the criticalsurface, and the other with a semidetached configuration, where the hotcomponent is just contacting the critical surface.

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Osservazione e dati astrometrici

Costellazione:Cefeo
Ascensione retta:21h09m28.85s
Declinazione:+55°41'33.8"
Magnitudine apparente:8.058
Distanza:200 parsec
Moto proprio RA:9.6
Moto proprio Dec:8.6
B-T magnitude:8.094
V-T magnitude:8.061

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 201759
TYCHO-2 2000TYC 3957-783-1
USNO-A2.0USNO-A2 1425-11559760
HIPHIP 104448
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