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HD 137058

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(Redirected from K Lupi) Star in the southern constellation of Lupus This article is about k Lupi. Not to be confused with κ (kappa) Lupi.
HD 137058
Observation data
Epoch J2000      Equinox J2000
Constellation Lupus
Right ascension 15 25 20.20923
Declination −38° 44′ 00.8803″
Apparent magnitude (V) 4.60
Characteristics
Spectral type A0 V
B−V color index 0.000±0.015
Astrometry
Radial velocity (Rv)−3.0±2.8 km/s
Proper motion (μ) RA: −41.573 mas/yr
Dec.: −24.603 mas/yr
Parallax (π)13.6178 ± 0.4759 mas
Distance240 ± 8 ly
(73 ± 3 pc)
Absolute magnitude (MV)−0.76
Details
Radius3.0 R
Luminosity155.71 L
Temperature8,178 K
Rotational velocity (v sin i)300.0 km/s
Other designations
k Ser, CD−38° 10289, HD 137058, HIP 75501, HR 5724, SAO 206616
Database references
SIMBADdata

HD 137058 is a star in the southern constellation of Lupus. Eggleton and Tokovinin (2008) list it as a single star, although Nitschelm and David (2011) noted it may be a double-lined spectroscopic binary. Its apparent visual magnitude is 4.60, which is bright enough to be visible to the naked eye. Based upon an annual parallax shift of 13.6 mas, it is located 240 light years away.

The stellar classification of the primary component is A0 V, matching an A-type main-sequence star. It is spinning rapidly with a projected rotational velocity of 300 km/s, giving it an oblate shape with an equatorial radius 22% larger than the polar radius. The star is radiating 156 times the Sun's luminosity from its photosphere at an effective temperature of 8,178 K.

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.
  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, S2CID 119257644.
  3. ^ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
  4. de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
  5. Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (2) (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  6. ^ McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–357, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
  7. ^ van Belle, Gerard T. (March 2012), "Interferometric observations of rapidly rotating stars", The Astronomy and Astrophysics Review, 20 (1): 51, arXiv:1204.2572, Bibcode:2012A&ARv..20...51V, doi:10.1007/s00159-012-0051-2, S2CID 119273474.
  8. "HD 137058". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-29.
  9. 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, S2CID 14878976.
  10. Nitschelm, C.; David, M. (September 2011), "An Investigation on Close Binaries in the Sco-Cen Complex", in Schmidtobreick, Linda; Schreiber, Matthias R.; Tappert, Claus (eds.), Evolution of compact binaries. Proceedings of a workshop held at Hotel San Martín, Viña del Mar, Chile 6-11 May 2011, ASP Conference Proceedings, vol. 447, San Francisco, CA: Astronomical Society of the Pacific, p. 75, Bibcode:2011ASPC..447...75N.
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