HD 83058

This article is about L Velorum. For l Velorum, see HD 79917.

HD 83058 is a subgiant star in the constellation Vela and a spectroscopic binary. It is visible to the naked eye with an apparent visual magnitude of 5.0. Based upon an annual parallax shift of 3.4254 mas, it is located 950 light-years from the Sun. The system is moving further away with a heliocentric radial velocity of +35 km/s.

HD 83058

Observation data Epoch J2000      Equinox J2000
Constellation	Vela[1]
Right ascension	09h 34m 08.793s[2]
Declination	−51° 15′ 18.95″[2]
Apparent magnitude (V)	5.00[3]
Characteristics
Evolutionary stage	subgiant
Spectral type	B2 IV[4]
U−B color index	−0.97[3]
B−V color index	−0.19[3]
Astrometry
Radial velocity (Rv)	+16.5±3.0[5] km/s
Proper motion (μ)	RA: −130.55[2] mas/yr Dec.: +42.98[2] mas/yr
Parallax (π)	3.4252±0.1907 mas[2]
Distance	950 ± 50 ly (290 ± 20 pc)
Absolute magnitude (MV)	−2.84[3]
Details
primary
Mass	9.3[6] M☉
Radius	5.405[7] R☉
Luminosity	2,686[7] L☉
Surface gravity (log g)	3.779[7] cgs
Temperature	17,887[7] K
Rotational velocity (v sin i)	64±2[5] km/s
Age	14.1[6] Myr
secondary
Rotational velocity (v sin i)	24±2[5] km/s
Other designations
L Vel, CD−50°4270, FK5 2764, HD 83058, HIP 46950, HR 3819, SAO 237107[8]
Database references
SIMBAD	data

HD 83058 has generally been considered to be a single star,^[9] but high-resolution spectra show it to be a double-lined spectroscopic binary.^[10] The two components have approximately the same spectral type.^[5] Line-profile variations have been detected which suggest that at least one component pulsates, as is common for stars of this spectral class.^[11]

HD 83058 was proposed as a runaway star from a supernova explosion. However, the discovery that it is a binary makes this unlikely.^[5]