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.[2] 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.[2]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Centaurus |
Right ascension | 12h 39m 52.52839s[1] |
Declination | −55° 58′ 31.8904″[1] |
Apparent magnitude (V) | +4.63[2] |
Characteristics | |
Spectral type | B8II/III[3] |
B−V color index | −0.082±0.013[2] |
Astrometry | |
Radial velocity (Rv) | +15.1±2.8[2] km/s |
Proper motion (μ) | RA: −43.38[1] mas/yr Dec.: −25.25[1] mas/yr |
Parallax (π) | 8.94 ± 0.24 mas[1] |
Distance | 365 ± 10 ly (112 ± 3 pc) |
Absolute magnitude (MV) | −0.61[2] |
Details | |
HD 110073 A | |
Mass | 4.0±0.2[4] M☉ |
Radius | 3.7[5] R☉ |
Luminosity | 385[4] L☉ |
Surface gravity (log g) | 3.35[6] cgs |
Temperature | 12,900[4] K |
Metallicity [Fe/H] | −0.90[6] dex |
Rotational velocity (v sin i) | 46±10[7] km/s |
Age | 129[4] Myr |
HD 110073 B | |
Mass | 1.13[4] M☉ |
Luminosity | 1.2[4] L☉ |
Temperature | 5,662[4] K |
Other designations | |
Database references | |
SIMBAD | data |
This is a single-lined spectroscopic binary star system that belongs to the Pleiades stream.[4] As of 2011, the pair had a linear projected separation of 130.8±12.1 AU.[9] The primary component is a mercury-manganese star[6] with a stellar classification of B8II/III.[3] These stars are often helium-weak, but this is one of the most normal members of this group in terms of helium abundance.[10] 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.[4]