Back فرد الكلب الأكبر (نجم) Arabic Furud AST Furud German Furud Spanish فرد (ستاره) Persian Zeta Canis Majoris French פורוד HE Furud Italian おおいぬ座ゼータ星 Japanese Furud (Stär) LB

Zeta Canis Majoris

Not to be confused with Z Canis Majoris.
Zeta Canis Majoris
Location of ζ Canis Majoris (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Canis Major
Right ascension 06h 20m 18.79204s[1]
Declination –30° 03′ 48.1202″[1]
Apparent magnitude (V) +3.025[2]
Characteristics
Spectral type B2.5 V[3]
U−B color index –0.71[2]
B−V color index –0.195[2]
Variable type Suspected β Cep[4]
Astrometry
Radial velocity (Rv)+32.2[5] km/s
Proper motion (μ) RA: +7.32[1] mas/yr
Dec.: +4.03[1] mas/yr
Parallax (π)9.00 ± 0.13 mas[1]
Distance362 ± 5 ly
(111 ± 2 pc)
Absolute magnitude (MV)−2.21[6]
Orbit[7][8]
Period (P)675 days
Eccentricity (e)0.57
Periastron epoch (T)2,416,508 JD
Argument of periastron (ω)
(secondary)		207°
Semi-amplitude (K1)
(primary)		13.5 km/s
Details
Mass7.7±0.2[9] M☉
Radius3.9[10] R☉
Luminosity3,603[11] L☉
Surface gravity (log g)4.0[10] cgs
Temperature18,700[11] K
Rotational velocity (v sin i)25[12] km/s
Age32.0±0.4[9] Myr
Other designations
Furud, Phurud, ζ CMa, Zeta CMa, 1 Canis Majoris, CD−30°3038, FK5 240, HD 44402, HIP 30122, HR 2282, SAO 196698[13]
Database references
SIMBADdata

Zeta Canis Majoris, or ζ Canis Majoris, also named Furud /ˈfjʊərəd/,[14] is a binary star system in the southern constellation of Canis Major. This system has an apparent visual magnitude of +3.0,[2] making it one of the brighter stars in the constellation and hence readily visible to the naked eye. Parallax measurements from the Hipparcos mission yield a distance estimate of around 362 ly (111 pc) from the Sun.[1] It is drifting further away with a radial velocity of +32 km/s.[5]

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