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HD 209307


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Visual polarization measurements in the Cepheus flare
We present polarization measurements on a stellar sample located in alarge area in Cepheus. The observations were made with the 2-m telescopeat the Pic du Midi (France), around 4350 A and with an accuracy of thepolarization degree of the order of 0.0001. At large scales, we findthat the galactic magnetic field as given by the direction of thepolarization (alignment of the dust) is, roughly speaking, parallel tothe galactic plane in the Cassiopeia cloud, with a scale size of theorder of 100 pc, while it is turned by about 90 in the Cepheus cloud. Atsmall scales, in both the Cepheus and the Cassiopeia clouds, the COcontent has little correlation with the degree of polarization.

Yerkes actinometry. Zone +73deg to +90deg.
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观测天体数据

星座:仙王座
右阿森松:21h57m58.44s
赤纬:+76°05'23.8"
视星:7.825
距离:231.481 天文距离
右阿森松适当运动:25.6
赤纬适当运动:42.7
B-T magnitude:9.3
V-T magnitude:7.947

目录:
适当名称   (Edit)
HD 1989HD 209307
TYCHO-2 2000TYC 4599-570-1
USNO-A2.0USNO-A2 1650-02480659
HIPHIP 108435

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