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UBV absolute CCD photometry and differential astrometry of close visual double stars, with G-type primaries
We present V magnitudes, (B-V) and (U-B) colours of close visual doublestar components, and their differences as well as separations andposition angles of 40 visual double stars. The common properties of themembers of this sample are the small angular separation rho, which isless than 7'', and the common spectral type of the primaries, which areof G-type. The observations made with the Bessel U, B and V filters,while the astrometry was performed in the V filter only. For theobservations, the CCD camera attached to the Cassegrain focus of the 90cm Dutch telescope, at La Silla, Chile, had been used. From the analysisof the data we concluded that from the sample of the fourty double starsobserved seven proved to be physical pairs, while the rest must havecommon origin components. Based on observations made at ESO La Silla,Chile. Tables 1 and 2 are only available in electronic form at the CDSvia anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html
| Photographic observations of visual double stars.
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| UVBY observations of A, F, G and K field stars
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| On the relationship between the apparent magnitudes given in several catalogues and the UBV system.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974A&AS...15..215O&db_key=AST
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Osservazione e dati astrometrici
| Costellazione: | Ofiuco |
| Ascensione retta: | 16h46m14.86s |
| Declinazione: | -17°20'48.1" |
| Magnitudine apparente: | 9.606 |
| Distanza: | 101.937 parsec |
| Moto proprio RA: | 0 |
| Moto proprio Dec: | 0 |
| B-T magnitude: | 10.29 |
| V-T magnitude: | 9.663 |
Cataloghi e designazioni:
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