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TYC 2552-783-1


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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.

Dwarf K and M stars of small proper motion found in a large spectroscopic survey
More than 2000 candidates for K and M dwarf status, generally havingproper motions that are either unknown or less than 0.2 arcsec perannum, have been identified in an objective-prism survey covering theentire sky north of declination - 25 degrees and more than 10 degreesfrom the galactic plane. More than 95 percent have no previousindication that they are dwarfs. Several dozen appear to be visualdouble stars.

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观测天体数据

星座:牧夫座
右阿森松:14h17m02.13s
赤纬:+35°28'07.8"
视星:10.496
右阿森松适当运动:23.6
赤纬适当运动:-23.8
B-T magnitude:12.012
V-T magnitude:10.622

目录:
适当名称   (Edit)
TYCHO-2 2000TYC 2552-783-1
USNO-A2.0USNO-A2 1200-07264356
HIPHIP 69787

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