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HD 20710


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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.

H-beta photometry of northern intermediate galactic latitude early-type stars and galactic structure away from the plane
Photoelectric H-beta photometry is presented for 255 early-type stars atintermediate galactic latitudes. Absolute magnitudes and distances arederived for the more luminous stars. Those with visual magnitudes lessthan or equal to 2.5 and at distances of up to 1 kpc from the galacticplane may follow the spiral structure in the plane.

UBV photometry and MK spectral classification of northern early-type stars at intermediate galactic latitudes
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1977MNRAS.180..691H&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Cassiopea
Ascensione retta:03h25m26.65s
Declinazione:+71°41'05.1"
Magnitudine apparente:7.603
Distanza:227.273 parsec
Moto proprio RA:2.3
Moto proprio Dec:-11.8
B-T magnitude:7.702
V-T magnitude:7.612

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 20710
TYCHO-2 2000TYC 4334-1118-1
USNO-A2.0USNO-A2 1575-01691307
HIPHIP 15959
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