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HD 168821


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관련 글

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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관측 및 측정 데이터

별자리:남쪽왕관자리
적경:18h23m57.77s
적위:-45°08'14.2"
가시등급:8.312
거리:230.947 파섹
적경상의 고유운동:-12.1
적위상의 고유운동:22.7
B-T magnitude:9.721
V-T magnitude:8.429

천체목록:
일반명   (Edit)
HD 1989HD 168821
TYCHO-2 2000TYC 8359-285-1
USNO-A2.0USNO-A2 0375-35278171
HIPHIP 90165

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