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HD 51848


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CCD astrometry and components instrumental magnitude difference of 432 Hipparcos wide visual double stars
Context: We measured the angular separations, position angles, ΔV, Δ y and Δ I of wide visual double stars during the period2003-2005. At least one component of the double stars in our sample hasan entry in the Hipparcos catalogue. Aims: Our measurements are acontribution to the study of the nature of these double stars. Methods: The northern double stars of the project were observed with the1.2 m telescope of the Kryonerion observatory and the southern with the1.0 m SAAO. We performed multiple-exposure CCD imaging of our targetsand used the standard procedure of data reduction and astrometric CCDcalibrations. Results: We present measurements of 213 northern and 219southern wide binaries.Based on observations made at Kryonerion Observatory of the NationalObservatory of Athens, Greece, and the South African AstronomicalObservatory. Full Table 1 and Tables 2, 3 are only available inelectronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr(130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/472/1055

VRI photometry of wide double stars with A- type primaries.
We are presenting VRI photometry of 93 wide visual double stars havinglate B- or A- type primaries, taken from the Annex of Double andMultiple Stars of the HIPPARCOS Input Catalogue. Spectral types havebeen estimated for most of the primaries and for the majority of thesecondaries. 40% of them probably have common origin components, forwhich we calculated photometric parallaxes and some orbital valuesestimates.

A second list of wide visual binaries
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A second list of wide visual binaries
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Datos observacionales y astrométricos

Constelación:Can Mayor
Ascensión Recta:06h58m27.93s
Declinación:-11°25'51.4"
Magnitud Aparente:8.053
Distancia:306.748 parsecs
Movimiento Propio en Ascensión Recta:-4.7
Movimiento Propio en Declinación:2.3
B-T magnitude:8.186
V-T magnitude:8.064

Catálogos y designaciones:
Nombres Propios   (Edit)
HD 1989HD 51848
TYCHO-2 2000TYC 5388-2232-1
USNO-A2.0USNO-A2 0750-03180907
HIPHIP 33567

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