O Velorum is classified as a white subgiant of spectral type A0IV,[4][failed verification][2] although a recent study indicates that it has not yet left the main sequence and that it still has 31% of its way through that stage.[1]
Given its classification as a subgiant, it would be a star similar to Alhena (γ Geminorum), but its luminosity —77 times greater than that of the Sun— is more comparable to that of an A0 main sequence star such as Phecda (γ Ursae Majoris), Sadachbia (γ Aquarii) or ε Herculis.
O Velorum has an effective temperature of 10,023 kelvins (10,350 according to another source) of 10,350 K.[5] and a mass of 2.70 ± 0.03 solar masses.[1]
Its radius is estimated to be 2.7 times larger than the Sun's radius[6] and it spins on its axis with a rotation speed of at least 40 km/s.
