HD 110073
HD 110073 is a star in the southern constellation Centaurus, near the southern constellation border with Crux. It has the Bayer designation l Centauri (lower case L), while HD 110073 is the star's identifier from the Henry Draper catalogue. This system is faintlyvisible to the naked eye with an apparent visual magnitude of +4.63. It is located at a distance of approximately 365 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +15 km/s.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 12h 39m 52.52839s |
| Declination | −55° 58′ 31.8904″ |
| Apparent magnitude (V) | +4.63 |
| Characteristics | |
| Spectral type | B8II/III |
| B−V color index | −0.082±0.013 |
| Astrometry | |
| Radial velocity (Rv) | +15.1±2.8 km/s |
| Proper motion (μ) | RA: −43.38 mas/yr Dec.: −25.25 mas/yr |
| Parallax (π) | 8.94 ± 0.24 mas |
| Distance | 365 ± 10 ly (112 ± 3 pc) |
| Absolute magnitude (MV) | −0.61 |
| Details | |
| HD 110073 A | |
| Mass | 4.0±0.2 M☉ |
| Radius | 3.7 R☉ |
| Luminosity | 385 L☉ |
| Surface gravity (log g) | 3.35 cgs |
| Temperature | 12,900 K |
| Metallicity [Fe/H] | −0.90 dex |
| Rotational velocity (v sin i) | 46±10 km/s |
| Age | 129 Myr |
| HD 110073 B | |
| Mass | 1.13 M☉ |
| Luminosity | 1.2 L☉ |
| Temperature | 5,662 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is a single-lined spectroscopic binary star system that belongs to the Pleiades stream. As of 2011, the pair had a linear projected separation of 130.8±12.1 AU. The primary component is a mercury-manganese star with a stellar classification of B8II/III. These stars are often helium-weak, but this is one of the most normal members of this group in terms of helium abundance. The system is a source for X-ray emission, which is most likely coming from the lower mass companion – it may even be a pre-main-sequence star.