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HD 100128


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Modeling Visual Photometry I: Preliminary Determination of Visual Bandpass
This paper addresses the issue of spectral sensitivity as part of theoverall visual model. A mathematical theory and observational method arepresented for the determination of color coefficient with error term foran individual observer.

Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS
Radial velocities have been determined for a sample of 2930 B2-F5 stars,95% observed by the Hipparcos satellite in the north hemisphere and 80%without reliable radial velocity up to now. Observations were obtainedat the Observatoire de Haute Provence with a dispersion of 80Ä,mm(-1) with the aim of studying stellar and galactic dynamics.Radial velocities have been measured by correlation with templates ofthe same spectral class. The mean obtained precision is 3.0 km s(-1)with three observations. A new MK spectral classification is estimatedfor all stars. Based on observations made at the Haute ProvenceObservatory, France and on data from The Hipparcos Catalogue, ESA.Tables 4, 5 and 6 are only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr or viahttp://cdsweb.u-strasbg.fr/Abstract.htm

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.

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Pozíciós és asztrometriai adatok

Csillagkép:Oroszlán
Rektaszcenzió:11h31m21.27s
Deklináció:+22°49'03.9"
Vizuális fényesség:7.837
Távolság:148.148 parszek
RA sajátmozgás:-33
Dec sajátmozgás:-27
B-T magnitude:8.096
V-T magnitude:7.859

Katalógusok és elnevezések:
Megfelelő nevek
HD 1989HD 100128
TYCHO-2 2000TYC 1982-307-1
USNO-A2.0USNO-A2 1125-06330997
HIPHIP 56207

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