Kappa Velorum
Kappa Velorum (κ Velorum, abbreviated Kappa Vel, κ Vel; proper name Markeb /ˈmɑːrkɛb/) is a binary star system in the southern constellation of Vela. The two components are designated Kappa Velorum A and B.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| Right ascension | 09h 22m 06.81761s |
| Declination | –55° 00′ 38.4017″ |
| Apparent magnitude (V) | 2.48 |
| Characteristics | |
| Spectral type | B2 IV |
| U−B color index | –0.78 |
| B−V color index | –0.20 |
| Astrometry | |
| Radial velocity (Rv) | 21.9 km/s |
| Proper motion (μ) | RA: –11.40 mas/yr Dec.: +11.52 mas/yr |
| Parallax (π) | 5.70 ± 0.30 mas |
| Distance | 570 ± 30 ly (175 ± 9 pc) |
| Absolute magnitude (MV) | −3.74 |
| Orbit | |
| Period (P) | 116.65 days |
| Eccentricity (e) | 0.19 |
| Semi-amplitude (K1) (primary) | 46.5 km/s |
| Details | |
| Mass | 10 - 11 M☉ |
| Radius | 9.1 R☉ |
| Age | 16 - 20 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
From parallax measurements, this system is located at a distance of roughly 572 light-years (175 parsecs) from the Sun. The apparent visual magnitude is 2.48, making it readily visible to the naked eye in the southern hemisphere. It forms part of an asterism known as the False Cross along with Delta Velorum, Iota Carinae and Epsilon Carinae, so called because it is sometimes mistaken for the Southern Cross, causing errors in astronavigation.
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