HD 76805

HD 76805
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Vela
Right ascension 08h 56m 19.2615s[1]
Declination −52° 43′ 24.5059″[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]
Distance380 ± 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]
Distance399 ± 7 ly
(122 ± 2 pc)
Orbit
PrimaryAa
CompanionAb
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
Mass4.14[4] M☉
Temperature16,000[2] K
Rotational velocity (v sin i)50[2] km/s
Ab
Mass0.59[4] M☉
Temperature9,500[2] K
B
Mass1.55[4] M☉
Temperature8,871[3] K
Other designations
H Vel, CPD−52 1788, HD 76805, HIP 43878, HR 3574, SAO 236417[5]
Database references
SIMBADdata

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

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]

  1. ^ a b c d e Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Veramendi2014 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Gaia DR2b was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference msc was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).