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HD 146622

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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
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.
Mesures d'etoiles doubles faites a Nice, etoiles doubles nouvelles (24eme serie) decouvertes a Nice. Table 1 gives 1182 measurements of 682 binaries observed with the 74 and50 cm refractors. Table 2 lists 26 new binaries discovered with the 50cm refractor.
Mesures d'étoiles doubles faites au réfracteur de 38 cm de l'Observatoire de Nice Not Available
Mesures d'étoiles doubles effectuées au réfracteur de 38 cm de l' Observatoire de Nice Not Available

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Osservazione e dati astrometrici

Costellazione:	Corona Boreale
Ascensione retta:	16^h16^m05.43^s
Declinazione:	+29Â°36'27.4"
Magnitudine apparente:	8.985
Distanza:	144.718 parsec
Moto proprio RA:	3.5
Moto proprio Dec:	-27.2
B-T magnitude:	9.51
V-T magnitude:	9.029

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 146622
TYCHO-2 2000	TYC 2054-298-1
USNO-A2.0	USNO-A2 1125-07566544
HIP	HIP 79713

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