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HD 20936


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Hipparcos astrometry for 257 stars using Tycho-2 data
We present improved Hipparcos astrometry for 257 Hipparcos stars,resolved into 342 components. For 64 of the stars no astrometry wasobtained in the Hipparcos Catalogue, while for the remaining starsadditional components have been added by this solution or the positionshave been revised considerably. We have used the published Hipparcostransit data for the new solutions, together with results from thesecond reduction of the Tycho data for defining better initial values.Based on observations made with the ESA Hipparcos astrometry satellite.Table 3 is only available in electronic form at the CDS via anonymousftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html

UBV photometry of wide visual double stars. V. Double stars with mainly K- and M- type primaries.
We present UBV photometric observations of 55 wide visual double starswith K- and M- type primaries. Our observations have been compared andcombined with information available in the literature. At least 58% ofthem are optical pairs.

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Osservazione e dati astrometrici

Costellazione:Eridano
Ascensione retta:03h22m06.32s
Declinazione:-13°16'23.2"
Magnitudine apparente:8.798
Distanza:386.1 parsec
Moto proprio RA:6.9
Moto proprio Dec:-14
B-T magnitude:10.249
V-T magnitude:8.918

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 20936
TYCHO-2 2000TYC 5301-472-1
USNO-A2.0USNO-A2 0750-00746219
HIPHIP 15690

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