HD 110073

This article is about l centauri. Not to be confused with i Centauri or λ Centauri.
HD 110073
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]
Distance365 ± 10 ly
(112 ± 3 pc)
Absolute magnitude (MV)−0.61[2]
Details
HD 110073 A
Mass4.0±0.2[4] M☉
Radius3.7[5] R☉
Luminosity385[4] L☉
Surface gravity (log g)3.35[6] cgs
Temperature12,900[4] K
Metallicity [Fe/H]−0.90[6] dex
Rotational velocity (v sin i)46±10[7] km/s
Age129[4] Myr
HD 110073 B
Mass1.13[4] M☉
Luminosity1.2[4] L☉
Temperature5,662[4] K
Other designations
l Cen, CD−39°7748, HD 110073, HIP 61789, HR 4817, SAO 203681[8]
Database references
SIMBADdata

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]

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]

  1. ^ a b c d e Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h i Cite error: The named reference aaa372_152 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Fracassini2001 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Adelman1990 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Buscombe1975 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Schöller2010 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Adelman1997 was invoked but never defined (see the help page).