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HD 111782

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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.
Kinematics and properties of F stars near the North Galactic Pole. II - The isothermal disc Radial velocities are given for about 550 photometrically-identifieddisk-population F stars lying within 15 deg of the North Galactic Pole.The overall radial and z-velocity distributions are found to be closelyGaussian, with corrected rms and mean z velocities of 11.3 + or - 0.6and -9.5 + or - 0.5 km/s, respectively. The isothermal kinematics of thepopulation are reflected in the constant velocity dispersion to a zdistance of 400 pc. No systematic variation of either the velocitydispersion or the stellar age with the metallicity-sensitive Stromgrendelta m1 index is noted over a range of ages up to 5 Gyr.
Further Studies of A-Stars and F-Stars in the Region of the North Galactic Pole - Part Four - a Catalogue of Uvbyr Photometry and Derived Quantities Not Available
Further Studies of A-Stars and F-Stars in the Region of the North Galactic Pole - Part Three - a Catalogue of Star Names and Positions Not Available
2.2-micron field stars at the North Galactic Pole The properties of the 2.2-micron field stars seen near the NorthGalactic Pole by the Two Micron Sky Survey and by surveys at highersensitivity are discussed. All the 2.2-micron sources found in thesesurveys can be identified with stars with known spectral types. Thedistribution of the 2.2-micron field stars appears to bewell-understood.
Photographic measures of double stars. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978A&AS...31..121A&db_key=AST
Studies of A and F stars in the region of the North galactic pole-II. uvby β photometry Not Available
Studies of A and F stars in the region of the North galactic pole-I. Radial velocities and MK Classifications Not Available
Mesures d'étoiles doubles faites au réfracteur de 38 cm de l'Observatoire de Nice Not Available
Photoelectric Magnitudes and Colors of Stars Near the North Galactic Pole. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1964ApJ...140..151H&db_key=AST
Photographic photometry at the North galactic Pole. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1956AJ.....61...80S&db_key=AST

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观测天体数据

星座:	后髮座
右阿森松:	12^h51^m27.69^s
赤纬:	+27Â°14'01.6"
视星:	9.688
右阿森松适当运动:	-28.4
赤纬适当运动:	-6.3
B-T magnitude:	10.079
V-T magnitude:	9.721

目录:

适当名称
HD 1989	HD 111782
TYCHO-2 2000	TYC 1995-2468-1
USNO-A2.0	USNO-A2 1125-06600442
HIP	HIP 62752

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