Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Canis Major |
Right ascension | 07h 08m 23.48608s[1] |
Declination | −26° 23′ 35.5474″[1] |
Apparent magnitude (V) | 1.824[2] |
Characteristics | |
Spectral type | F8 Ia[3] |
U−B color index | +0.584[2] |
B−V color index | +0.67[4][5] |
Variable type | ?[6] |
Astrometry | |
Radial velocity (Rv) | 34.3 ± 0.9[7] km/s |
Proper motion (μ) | RA: –3.12[1] mas/yr Dec.: +3.31[1] mas/yr |
Parallax (π) | 2.03 ± 0.38 mas[1] |
Distance | approx. 1,600 ly (approx. 490 pc) |
Absolute magnitude (MV) | –5.97[4] |
Details[3] | |
Mass | 14.9±1.6 M☉ |
Radius | 188[8] R☉ |
Luminosity | 37,500[9] – 51,000[10] L☉ |
Surface gravity (log g) | 1.00±0.14 cgs |
Temperature | 5850±150 K |
Metallicity [Fe/H] | 0.28[4] dex |
Rotational velocity (v sin i) | 13.4±1.9[5] km/s |
Age | 12 Myr |
Other designations | |
Database references | |
SIMBAD | data |
Delta Canis Majoris (Latinised from δ Canis Majoris, abbreviated Delta CMa, δ CMa), officially named Wezen /ˈwiːzən/,[11] is a star in the constellation of Canis Major. It is a yellow-white F-type supergiant with an apparent magnitude of +1.83. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified.[12]
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