HD 76805

H Velorum is a triple star system in the constellation Vela, at a distance of approximately 390 light years.

HD 76805

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Vela
Right ascension	08h 56m 19.2615s[1]
Declination	−52° 43′ 24.506″[1]
Apparent magnitude (V)	4.70
Characteristics
Spectral type	B5V + B9.5V[2]
Astrometry
A
Proper motion (μ)	RA: −15.386±0.588[1] mas/yr Dec.: 14.468±0.524[1] mas/yr
Parallax (π)	8.5823±0.3177 mas[1]
Distance	380 ± 10 ly (117 ± 4 pc)
B
Proper motion (μ)	RA: −17.787±0.271[3] mas/yr Dec.: 12.031±0.250[3] mas/yr
Parallax (π)	8.1722±0.1358 mas[3]
Distance	399 ± 7 ly (122 ± 2 pc)
Orbit
Primary	Aa
Companion	Ab
Period (P)	1.097654
Eccentricity (e)	0
Semi-amplitude (K1) (primary)	48.7 km/s
Semi-amplitude (K2) (secondary)	92.8 km/s
Details
Aa
Mass	4.14[4] M☉
Temperature	16,000[2] K
Rotational velocity (v sin i)	50[2] km/s
Ab
Mass	0.59[4] M☉
Temperature	9,500[2] K
B
Mass	1.55[4] M☉
Temperature	8,871[3] K
Other designations
H Vel, CPD−52 1788, HD 76805, HIP 43878, HR 3574, SAO 236417[5]
Database references
SIMBAD	data

A visual pair of stars with magnitudes 4.7 and 8.0 are separated by 2.7″. Their estimated orbital period is 646,000 years. The primary is a spectroscopic binary with two B-class main sequence stars in a 1.1-day orbit.^[2]