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HD 99151


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The nature of the Yale Common Proper Motion groups of stars
Attention is given to a large group of approximately 90 stars, twogroups of 20-30 stars, and 12 groups of a few stars each, taken from DDOsystem image tube spectral classification and intermediate bandphotometry for the Yale Common Proper Motion groups of 180 southernstars. Spectroscopic and photometric analyses of these groups haveindicated a very scattered Pop I main sequence in their color-magnitudediagrams. Distance moduli of 5 or less were derived from the averagespectroscopic parallaxes, in keeping with the proper motion amplitude of0.1 arcsec/year. The main sequence of each group shows scatter whenplotted in an HR diagram, indicating that they are probably nothomogeneous groups of stars sharing common physical origins.

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观测天体数据

星座:半人馬座
右阿森松:11h24m13.37s
赤纬:-47°58'34.0"
视星:9.812
右阿森松适当运动:-12.3
赤纬适当运动:-130.7
B-T magnitude:10.574
V-T magnitude:9.875

目录:
适当名称   (Edit)
HD 1989HD 99151
TYCHO-2 2000TYC 8217-81-1
USNO-A2.0USNO-A2 0375-13654190
HIPHIP 55659

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