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HD 115197


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Effective temperature scale and bolometric corrections from 2MASS photometry
We present a method to determine effective temperatures, angularsemi-diameters and bolometric corrections for population I and II FGKtype stars based on V and 2MASS IR photometry. Accurate calibration isaccomplished by using a sample of solar analogues, whose averagetemperature is assumed to be equal to the solar effective temperature of5777 K. By taking into account all possible sources of error we estimateassociated uncertainties to better than 1% in effective temperature andin the range 1.0-2.5% in angular semi-diameter for unreddened stars.Comparison of our new temperatures with other determinations extractedfrom the literature indicates, in general, remarkably good agreement.These results suggest that the effective temperaure scale of FGK starsis currently established with an accuracy better than 0.5%-1%. Theapplication of the method to a sample of 10 999 dwarfs in the Hipparcoscatalogue allows us to define temperature and bolometric correction (Kband) calibrations as a function of (V-K), [m/H] and log g. Bolometriccorrections in the V and K bands as a function of T_eff, [m/H] and log gare also given. We provide effective temperatures, angularsemi-diameters, radii and bolometric corrections in the V and K bandsfor the 10 999 FGK stars in our sample with the correspondinguncertainties.

Spectral Classification of Stars in A Supplement to the Bright Star Catalogue
MK spectral types are given for about 584 stars in A Supplement to theBright Star Catalogue. These are compared with Hipparcos parallaxes tocheck the reliability of those classifications. The estimated errors are+/-1.2 subtypes, and 10% of the luminosity classes may be wrong.

The Tokyo PMC catalog 90-93: Catalog of positions of 6649 stars observed in 1990 through 1993 with Tokyo photoelectric meridian circle
The sixth annual catalog of the Tokyo Photoelectric Meridian Circle(PMC) is presented for 6649 stars which were observed at least two timesin January 1990 through March 1993. The mean positions of the starsobserved are given in the catalog at the corresponding mean epochs ofobservations of individual stars. The coordinates of the catalog arebased on the FK5 system, and referred to the equinox and equator ofJ2000.0. The mean local deviations of the observed positions from theFK5 catalog positions are constructed for the basic FK5 stars to comparewith those of the Tokyo PMC Catalog 89 and preliminary Hipparcos resultsof H30.

Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Subtittle: Radial velocities: The Wilson-Evans-Batten catalogue.
We give a common version of the two catalogues of Mean Radial Velocitiesby Wilson (1963) and Evans (1978) to which we have added the catalogueof spectroscopic binary systems (Batten et al. 1989). For each star,when possible, we give: 1) an acronym to enter SIMBAD (Set ofIdentifications Measurements and Bibliography for Astronomical Data) ofthe CDS (Centre de Donnees Astronomiques de Strasbourg). 2) the numberHIC of the HIPPARCOS catalogue (Turon 1992). 3) the CCDM number(Catalogue des Composantes des etoiles Doubles et Multiples) byDommanget & Nys (1994). For the cluster stars, a precise study hasbeen done, on the identificator numbers. Numerous remarks point out theproblems we have had to deal with.

Spots on RS CVn from spectroscopy and photometry
We have used contemporaneous spectra and V light curves to form spotmodels for RS CVn in 1991 and 1992. More than two spots are needed tofit all the properties of the observations. In fact, moderately smallspots (22 x 28 deg in latitude and longitude) having only a slighteffect on the rotational light curve were eclipsed in both years, and wefind that a collection of 6-8 such moderate spots is required to fit theline profiles in each year. These groups of spots also account naturallyfor a difference in level of light between the two years. There is noevidence for polar spots larger than 18 degrees in radius. We have alsoderived new orbits from radial velocities of the stars, which give themass ratio Mc/Mh = 1.04 +/-0.02.

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

Spectrophotometry of RS Canum Venaticorum, AR Lacertae, and UX ARIETIS
The wavelength dependences of the ultraviolet excesses of the RSCVn-type stars RS CVn, AR Lac, and UX Ari have been measuredspectrophotometrically with a wavelength resolution of 60 A. A number ofmechanisms are examined to account for the excess light from thesesystems, and it is concluded that free-free emission from hotcircumstellar gas provides the most satisfactory explanation.

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

The Motions of the A Stars at the North Galactic Pole
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1969PASP...81..741E&db_key=AST

The galactic force law K(z
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1969AJ.....74..139P&db_key=AST

Radial Velocities of A-Type Stars Near the North Galactic Pole
Not Available

Three-colour photometry of early-type stars near the galactic poles
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1963MNRAS.127...83W&db_key=AST

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观测天体数据

星座:獵犬座
右阿森松:13h15m08.60s
赤纬:+35°26'44.9"
视星:6.817
距离:139.86 天文距离
右阿森松适当运动:-44.5
赤纬适当运动:3.4
B-T magnitude:7.027
V-T magnitude:6.835

目录:
适当名称   (Edit)
HD 1989HD 115197
TYCHO-2 2000TYC 2541-511-1
USNO-A2.0USNO-A2 1200-07045664
HIPHIP 64648

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