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Two-colour photometry for 9473 components of close Hipparcos double and multiple stars
Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.
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Observations of visual double stars with the 152-cm aperture, 12.2-mfocal length telescope at the Spanish Observatory at Calar Alto(Almeria, Spain) are reported. The observations were carried out inApril 1993. The data include 93 micrometer measurements for 55 doublestars.
| New double stars (9th series) discovered at Nice
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973A&AS...10..273C&db_key=AST
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Osservazione e dati astrometrici
| Costellazione: | Corona Boreale |
| Ascensione retta: | 15h39m21.49s |
| Declinazione: | +33°31'04.6" |
| Magnitudine apparente: | 10.907 |
| Moto proprio RA: | -17.5 |
| Moto proprio Dec: | 18.1 |
| B-T magnitude: | 11.433 |
| V-T magnitude: | 10.951 |
Cataloghi e designazioni:
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