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HD 2798


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관련 글

A kinematic and abundance survey at the galactic poles
The DDO intermediate band system is used to obtain detailed informationabout abundance gradients and velocity dispersions in the galaxy, withan emphasis on the properties of halo stars in the range of from 1 to 5kpc. The DDO abundance index is calibrated agianst (Fe/H) for metal-poorstars, with a resulting gradient of about -0.2 per kpc. However, whenthe sample is divided into two subsamples with (Fe/H) less than -0.5 andequal to or greater than -0.5, the gradients are -0.14 and 0.00,respectively. DDO observations of about 1000 stars, mostly G5-K5 giants,show that the velocity dispersion increases both with decrease inmetallicity and increase in z distance. The abundances found for high-zstars are similar to the A-star results of Rodgers (1971) in that abouthalf the K giants above 1 kpc appear to have solar abundances.

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관측 및 측정 데이터

별자리:고래자리
적경:00h31m16.48s
적위:-20°56'53.1"
가시등급:10.398
적경상의 고유운동:-7.3
적위상의 고유운동:-3.4
B-T magnitude:11.16
V-T magnitude:10.461

천체목록:
일반명   (Edit)
HD 1989HD 2798
TYCHO-2 2000TYC 5846-406-1
USNO-A2.0USNO-A2 0675-00200808
HIPHIP 2461

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