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HD 209841


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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.

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Observation and Astrometry data

Constellation:Cepheus
Right ascension:22h02m10.84s
Declination:+75°21'18.1"
Apparent magnitude:7.516
Distance:350.877 parsecs
Proper motion RA:-6.9
Proper motion Dec:-39.6
B-T magnitude:8.717
V-T magnitude:7.616

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 209841
TYCHO-2 2000TYC 4600-2432-1
USNO-A2.0USNO-A2 1650-02489487
HIPHIP 108783

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