HD 237711

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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.

Spectral and Luminosity Classifications and Measurements of the Strength of Cyanogen Absorption for Late-Type Stars from Objective-Prism Spectra.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1961ApJ...134..809Y&db_key=AST

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Osservazione e dati astrometrici

Costellazione:	Lince
Ascensione retta:	08^h27^m56.59^s
Declinazione:	+57Â°11'35.4"
Magnitudine apparente:	9.401
Moto proprio RA:	-13.7
Moto proprio Dec:	-6
B-T magnitude:	10.726
V-T magnitude:	9.511

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 237711
TYCHO-2 2000	TYC 3800-1537-1
USNO-A2.0	USNO-A2 1425-07159165
HIP	HIP 41511

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