HD 143009

HD 143009 is a single[6] star in the southern constellation of Lupus. It has an orange hue and is visible to the naked eye with an apparent visual magnitude of 4.99.[2] The star lies at a distance of approximately 380 light years from the Sun based on parallax,[1] but is drifting closer with a radial velocity of −27 km/s.[2] It has an absolute magnitude of −0.64.[2]

HD 143009
Observation data
Epoch J2000      Equinox J2000
Constellation Lupus
Right ascension 15h 59m 30.26689s[1]
Declination −41° 44′ 39.9869″[1]
Apparent magnitude (V) 4.99[2]
Characteristics
Spectral type K0 II-III[3]
B−V color index 0.988±0.002[2]
Astrometry
Radial velocity (Rv)−27.0±2.8[2] km/s
Proper motion (μ) RA: −37.658[1] mas/yr
Dec.: −16.707[1] mas/yr
Parallax (π)8.5885 ± 0.3110[1] mas
Distance380 ± 10 ly
(116 ± 4 pc)
Absolute magnitude (MV)−0.64[2]
Details
Radius16.83+0.16
−0.27[1] R☉
Luminosity152.3+6.2
−6.3[1] L☉
Surface gravity (log g)2.26[4] cgs
Temperature4,942+40
−23[1] K
Metallicity [Fe/H]0.07[4] dex
Other designations
e Lup, CD−41° 10478, FK5 1418, HD 143009, HIP 78323, HR 5943, SAO 226425[5]
Database references
SIMBADdata

This is an evolved K-type star with a stellar classification of K0 II-III,[3] displaying a luminosity class with mixed traits of a bright giant (II) and a giant star (III). With the supply of hydrogen at its core exhausted, the star has expanded to 16.8 times the radius of the Sun. It is radiating 152 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,942 K.[1]

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  3. Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
  4. Earle Luck, R. (2014), "Parameters and Abundances in Luminous Stars", The Astronomical Journal, 147 (6): 137, Bibcode:2014AJ....147..137L, doi:10.1088/0004-6256/147/6/137.
  5. "HD 143009". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-28.
  6. Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
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