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HD 100822


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Micrometer Measures of Double Stars
Micrometer measures of 795 double stars made with the 26 inch (0.66 m)refractor of the US Naval Observatory from 1984 to 1990 are presented.

Visual multiples. VII - MK classifications
Classifications are given for 865 components of visual multiples; theyshow no systematic differences from the MK system, and the random errorsare one subclass in type and two-thirds of a luminosity class. It isfound that at least 1% of the F-type IV and V stars are weak-lined, 32%of the A4-F1 IV and V stars are Am, and 5% of the A0-A3 IV and V starsare early-type Am. Attention is called to the large fraction (55%) ofthe A3-A9 III-V stars that are of luminosity classes III or IV, unlikethe percentage (16%) at neighboring types.

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观测天体数据

星座:獅子座
右阿森松:11h36m14.61s
赤纬:+03°18'04.0"
视星:7.196
距离:215.517 天文距离
右阿森松适当运动:-32.2
赤纬适当运动:-39.7
B-T magnitude:8.381
V-T magnitude:7.294

目录:
适当名称   (Edit)
HD 1989HD 100822
TYCHO-2 2000TYC 274-1048-1
USNO-A2.0USNO-A2 0900-06964625
HIPHIP 56598

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