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HD 184240


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Times of Minima of Eclipsing Binaries DI Herculis and V1143 Cygni
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Photoelectric minima of 30 eclipsing binary systems
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UvbyHbeta_ photometry of main sequence A type stars.
We present Stroemgren uvby and Hbeta_ photometry for a set of575 northern main sequence A type stars, most of them belonging to theHipparcos Input Catalogue, with V from 5mag to 10mag and with knownradial velocities. These observations enlarge the catalogue we began tocompile some years ago to more than 1500 stars. Our catalogue includeskinematic and astrophysical data for each star. Our future goal is toperform an accurate analysis of the kinematical behaviour of these starsin the solar neighbourhood.

Radial velocity measurements. IV - Ground-based accompaniment to the HIPPARCOS observation program
The paper presents 396 radial velocities of stars distributed in 19fields of 4 x 4 degrees. The study employs the Fehrenbach objectiveprism method and the same measuring technique used in a previous paper(Fehrenbach et al., 1987).

Search for Short Time Scale Light Variation in HD 183339 and HD 184927
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Periods and period variations of some eclipsing variables.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975A&AS...20..199G&db_key=AST

A photo-electric study of XZ Cygni
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Membre dels grups següents:

Dades d'Observació i Astrometria

Constel·lació:Cygnus
Ascensió Recta:19h30m34.48s
Declinació:+56°08'10.4"
Magnitud Aparent:6.671
Distancia:229.885 parsecs
Moviment propi RA:6.9
Moviment propi Dec:11.7
B-T magnitude:6.689
V-T magnitude:6.673

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 184240
TYCHO-2 2000TYC 3925-878-1
USNO-A2.0USNO-A2 1425-09743694
HIPHIP 95931
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