Astronomy:HD 143009
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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 |
| Distance | 380 ± 10 ly (116 ± 4 pc) |
| Absolute magnitude (MV) | −0.64[2] |
| Details | |
| Radius | 16.83+0.16 −0.27[1] R☉ |
| Luminosity | 152.3+6.2 −6.3[1] L☉ |
| Surface gravity (log g) | 2.26[4] cgs |
| Temperature | 4,942+40 −23[1] K |
| Metallicity [Fe/H] | 0.07[4] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 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.
- ↑ 4.0 4.1 Earle Luck, R. (2014), "Parameters and Abundances in Luminous Stars", The Astronomical Journal 147 (6): 137, doi:10.1088/0004-6256/147/6/137, Bibcode: 2014AJ....147..137L.
- ↑ "HD 143009". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+143009.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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