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HD 46813


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UBV absolute CCD photometry and differential astrometry of a sample of visual double stars with A-type primaries
We present V magnitudes, (B-V) and (U-B) colours of the components of111 visual double stars and their relative position measurements rho andtheta . The primaries are of spectral class A; the angular separation isin the 2farcs5 -8arcsec range. The observations were made at the 61-cmreflector of University of Toronto Southern Observatory, Chile. Theobtained photometric results are of a moderate quality for absolutevalues (0.04() m (mag) in V and about 0.02() m in the (B-V) and (U-B)colour indices) and more precise in Delta V and Delta (U-B), Delta (B-V)(0.023() m and 0.015() m, respectively). We find that about 60% ofsecondaries are also of spectral type A; 56% of pairs have Delta (B-V)less than 0.1() m. The two-colour diagram reveals significant offset ofobjects from the curve of unreddened Main Sequence stars. Acomprehensive survey of stars in the close vicinity to the objects isalso presented. The final astrometric accuracy of ~ 0farcs01 in rho and0fdg1 in theta provides additional measurements for study of relativemotion of the components. Based on observations made at University ofToronto Southern Observatory, Las Campanas, Chile. Tables\arabic{tabptm}--\arabic{tabast} are only available in electronic format the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) orvia http://cdsweb.u-strasbg.fr/Abstract.html

A second list of wide visual binaries
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A second list of wide visual binaries
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Search for Beta Cephei stars south of declination -20 deg. I - Incidence of light variability among early B giants and subgiants: Summer objects
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Datos observacionales y astrométricos

Constelación:Can Mayor
Ascensión Recta:06h34m08.11s
Declinación:-29°37'46.8"
Magnitud Aparente:7.099
Distancia:125.313 parsecs
Movimiento Propio en Ascensión Recta:-1.3
Movimiento Propio en Declinación:-64.4
B-T magnitude:7.42
V-T magnitude:7.126

Catálogos y designaciones:
Nombres Propios   (Edit)
HD 1989HD 46813
TYCHO-2 2000TYC 6520-77-1
USNO-A2.0USNO-A2 0600-03600927
HIPHIP 31325

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