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Photometric Study of RX Cephei
Photoelectric observations of RX Cephei from Zsoldas and McAdam (1993)and the authors, and long term visual observations from Schmude and theAAVSO were analyzed. RX Cep, whose variability has been questioned,appears to have become 0.15 magnitude brighter between 1990 and 2000.There is also some evidence of a 350-day period. The B-V color index ofthis star may also be calculated as 1.12+/-0.04.
| Is RX Cep a Variable Star?
Not Available
| 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.
| A. de Sitter's photographic polar photometry revisited; some remarks on photographic photometry with objective gratings
Not Available
| Photographic magnitudes of stars brighter than 7m.75 between +75° and +80° declination (Errata: 11 270)
Not Available
| Yerkes actinometry. Zone +73deg to +90deg.
Not Available
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Besorolás csoportokba:
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Pozíciós és asztrometriai adatok
| Csillagkép: | Cefeusz |
| Rektaszcenzió: | 01h40m31.63s |
| Deklináció: | +81°25'47.4" |
| Vizuális fényesség: | 7.131 |
| Távolság: | 299.401 parszek |
| RA sajátmozgás: | -8.5 |
| Dec sajátmozgás: | -1.2 |
| B-T magnitude: | 7.11 |
| V-T magnitude: | 7.13 |
Katalógusok és elnevezések:
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