Lambda Velorum

"Suhail" redirects here. For other uses, see Souhail. For other stars, see Suhail (star).
λ Velorum
(Suhail)
Location of λ Velorum (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Vela
Right ascension 09h 07m 59.75787s[1]
Declination −43° 25′ 57.3273″[1]
Apparent magnitude (V) 2.21[2] (2.14–2.30[3])
Characteristics
Spectral type K4 Ib[4]
U−B color index +1.80[2]
B−V color index +1.65[2]
Variable type LC[3]
Astrometry
Radial velocity (Rv)+18.4[5] km/s
Proper motion (μ) RA: −24.01[1] mas/yr
Dec.: +13.52[1] mas/yr
Parallax (π)5.99 ± 0.11 mas[1]
Distance545 ± 10 ly
(167 ± 3 pc)
Absolute magnitude (MV)−3.99[6]
Details[7]
Mass7.0+1.5
−1.1 M☉
Radius211±6 R☉
Luminosity8,300 L☉
Surface gravity (log g)0.64[8] cgs
Temperature3,835±100 K
Metallicity [Fe/H]+0.06[9] dex
Rotational velocity (v sin i)5.6±1.0 km/s
Age31.6 ± 1.7[10] Myr
Other designations
Alsuhail, Al Suhail al Wazn, Suhail, Al' Sukhal', CD−42°4990, FK5 345, HD 78647, HIP 44816, HR 3634, SAO 220878
Database references
SIMBADdata

Lambda Velorum (λ Velorum, abbreviated Lambda Vel, λ Vel), officially named Suhail /ˈsuːheɪl/,[11] is a star in the southern constellation of Vela. With a mean apparent visual magnitude of 2.21,[2] this is the third-brightest star in the constellation and one of the brighter stars in the sky. The distance to this star can be measured directly using the parallax technique, yielding an estimated 545 light-years (167 parsecs) from the Sun.[1]

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