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HD 201489


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Interstellar extinction and polarimetric properties of the star HD 200775
Reddening and polarization are obtained and separated into intrinsic andinterstellar components for the Herbig Be star HD 200775, which issurrounded by the NGC 7023 reflection nebula. A reddening map based onstar counts is used to derive the relation between (C-13)O columndensity and extinction, and the maximum interstellar polarization isfound to be 0.88 percent at the maximum wavelength of 0.532 microns;this indicates that the size distribution of the particles in the cloudresponsible for the optical extinction and polarization is rathersimilar to that of the surrounding interstellar medium.

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观测天体数据

星座:仙王座
右阿森松:21h05m59.21s
赤纬:+69°15'55.6"
视星:8.894
距离:534.759 天文距离
右阿森松适当运动:11.7
赤纬适当运动:7.8
B-T magnitude:9.142
V-T magnitude:8.915

目录:
适当名称   (Edit)
HD 1989HD 201489
TYCHO-2 2000TYC 4460-1436-1
USNO-A2.0USNO-A2 1575-04586824
HIPHIP 104143

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