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TYC 3025-731-1

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Inaccuracies in the spectral classification of stars from the Tycho-2 Spectral Type Catalogue We compare the spectroscopic and trigonometric parallaxes of commonstars from the Tycho-2 Spectral Type and Hipparcos Catalogues. Thiscomparison has revealed that the distance estimations for theoverwhelming majority of stars by both methods yield very similarresults. However, there is a small fraction of stars for which thedistance estimates differ significantly. It is these stars that are thesubject of our study. We have been able to find the causes of thesedifferences.
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.
The luminosity law for late-type main-sequence stars in the solar neighborhood Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974PASP...86..697E&db_key=AST
Photovisual magnitudes of 418 dwarf M stars and 34 parallax stars. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1956AJ.....61..219S&db_key=AST
The radial velocities of 166 red dwarf stars. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1954AJ.....59..218D&db_key=AST
Dwarf M. Stars Found Spectrophotometrically-Third List. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1952ApJ...116..117V&db_key=AST

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:	Av Kopekleri
Sað Açýklýk:	13^h25^m08.00^s
Yükselim:	+38Â°55'21.0"
Görünürdeki Parlaklýk:	9.995
Uzaklýk:	39.231 parsek
özdevim Sað Açýklýk:	-127
özdevim Yükselim:	-25.2
B-T magnitude:	11.385
V-T magnitude:	10.11

Kataloglar ve belirtme:

Özgün isimleri	(Edit)
TYCHO-2 2000	TYC 3025-731-1
USNO-A2.0	USNO-A2 1275-08251095
HIP	HIP 65469

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