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CCD measurements of visual double stars made with the 74 cm and 50 cm refractors of the Nice Observatory (2nd series)
We present 619 measurements of 606 visual double stars made by CCDimaging from 1996 to 1999 with the 74 cm and 50 cm refractors of theNice observatory. Angular separation, position angle and magnitudedifference are given. Magnitude differences estimated from CCD imagesare compared with magnitude differences given in the Hipparcos catalog.The residuals in angular separation and position angle are computed forbinaries with known orbit. Table 2 is 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/cgi-bin/qcat?J/A+A/378/954
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Observation and Astrometry data
| Constellation: | Hercule |
| Right ascension: | 18h26m34.71s |
| Declination: | +24°22'12.6" |
| Apparent magnitude: | 8.023 |
| Distance: | 763.359 parsecs |
| Proper motion RA: | 8.7 |
| Proper motion Dec: | -0.3 |
| B-T magnitude: | 10 |
| V-T magnitude: | 8.187 |
Catalogs and designations:
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