| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vela |
| Right ascension | 08h 29m 04.752s[1] |
| Declination | –47° 55′ 44.12″[1] |
| Apparent magnitude (V) | +5.33 |
| Characteristics | |
| Spectral type | B2IV + B2IV[2] |
| Astrometry | |
| Radial velocity (Rv) | 29.00 ± 3.7[3] km/s |
| Proper motion (μ) | RA: –6.90 ± 0.43[1] mas/yr Dec.: 7.12 ± 0.34[1] mas/yr |
| Parallax (π) | 1.53 ± 0.34 mas[1] |
| Distance | approx. 2,100 ly (approx. 700 pc) |
| Absolute magnitude (MV) | –1.06 |
| Orbit[4] | |
| Primary | HD 72018 Aa |
| Companion | HD 72018 Ab |
| Period (P) | 340 ± 50 yr |
| Semi-major axis (a) | 0.427 ± 0.030″ |
| Eccentricity (e) | 0.748 ± 0.030 |
| Inclination (i) | 78.9 ± 2.0° |
| Longitude of the node (Ω) | 114.7 ± 2.0° |
| Periastron epoch (T) | 1947.7 ± 2.0 |
| Argument of periastron (ω) (secondary) | 300.0 ± 5.0° |
| Details | |
| HD 72018 Aa | |
| Mass | 6.08 ± 3.43[4] M☉ |
| HD 72018 Ab | |
| Mass | 5.45 ± 3.08[4] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 72108 (A Vel, A Velorum) is a star system in the constellation Vela. It is approximately 1640 light years from Earth.
The primary component, HD 72108 A, is a blue-white B-type subgiant with an apparent magnitude of +5.33. It is a spectroscopic binary, whose components are separated by 0.176 arcseconds. At a distance of 4 arcseconds away is the third component, the magnitude +7.7 HD 72108 B. The fourth component, HD 72108 C has an apparent magnitude of +9.3, and is 19 arcseconds from the primary.
van Leeuwen2007 was invoked but never defined (see the help page).Docobo2013 was invoked but never defined (see the help page).SIMBAD was invoked but never defined (see the help page).