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HD 6523


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Parameters on single Wolf-Rayet stars.
Among 157 known galactic WR stars 70 are WC, 81 - WN, 2 - WO and 4 -intermediate type Wolf-Rayet stars (WN stars with comparatively stronglines of carbon ions). Among these 157 WR stars 31 have absorption linesof a second component (OB star) in the spectrum. Effective temperaturesare: Teff ≈ 30000 - 50000K for WN8 - WN3 stars andTeff ≈ 20000 - 50000K for WC9 - WC5 stars. Mass loss ratesof WR stars are high: M≈ 2×10-5 -2×10-4M_sun;/y. Chemical composition is abnormal and onthe HR diagram the early subtype WR stars are situated to the left andthe late subtype WR stars to the right from the position ofmain-sequence O-stars. The masses of WR stars lie within the limits M =5 - 50 M_sun;.

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Observation and Astrometry data

Constellation:カシオペヤ座
Right ascension:01h06m58.42s
Declination:+50°35'09.9"
Apparent magnitude:7.849
Distance:308.642 parsecs
Proper motion RA:6.2
Proper motion Dec:-6
B-T magnitude:9.643
V-T magnitude:7.998

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 6523
TYCHO-2 2000TYC 3271-1713-1
USNO-A2.0USNO-A2 1350-01101110
HIPHIP 5236

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