Kappa Reticuli

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Kappa Reticuli
Reticulum IAU.svg
Red circle.svg
Location of κ Reticuli (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Reticulum
Right ascension  03h 29m 22.67724s[1]
Declination −62° 56′ 15.0991″[1]
Apparent magnitude (V) +4.71[2] + 10.7[3]
Spectral type F3 V[4] or F3 IV/V[5] + M1[6]
U−B color index −0.04[2]
B−V color index +0.39[2]
Radial velocity (Rv)+12.5±0.4[7] km/s
Proper motion (μ) RA: +382.84[1] mas/yr
Dec.: +373.05[1] mas/yr
Parallax (π)46.12 ± 0.13[1] mas
Distance70.7 ± 0.2 ly
(21.68 ± 0.06 pc)
Absolute magnitude (MV)+2.98[8]
κ Ret A
Mass1.32[9] M
Radius1.1[10] R
Surface gravity (log g)4.31[9] cgs
Temperature6,796±231[9] K
Metallicity [Fe/H]−0.07[11] dex
Rotational velocity (v sin i)13.5±0.7[12] km/s
Age848[9] Myr
κ Ret B
Mass0.54[6] M
Radius0.50[6] R
Luminosity0.043[6] L
Temperature3,733[6] K
Other designations
κ Ret, 4 Ret, CD−63° 112, FK5 126, HD 22001, HIP 16245, HR 1083, SAO 248819, WDS J03294-6256A[13]
Database references

Kappa Reticuli (κ Reticuli) is a binary star[3] system in the southern constellation of Reticulum. It is visible to the naked eye, having a combined apparent visual magnitude of +4.71.[2] Based upon an annual parallax shift of 46.12 mas as seen from Earth,[1] it is located 71 light years from the Sun. Based upon its space velocity components, this star is a member of the Hyades supercluster of stars that share a common motion through space.[14]

Houk and Cowley (1978) catalogued the yellow-hued[15] primary, component A, with a stellar classification of F3 IV/V,[5] indicating this is an F-type star that showing mixed traits of a main sequence and a more evolved subgiant star. Later, Grey et al. (2006) listed a class of F3 V,[4] suggesting it is an F-type main-sequence star. It is emitting a statistically significant amount of infrared excess, suggesting the presence of an orbiting debris disk.[16] The secondary, component B, is an orange-hued[15] star with a visual magnitude of 10.4 at an angular separation of 54 arc seconds from the primary.[3]


  1. ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. ^ a b c d Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
  3. ^ a b c Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
  4. ^ a b Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
  5. ^ a b Houk, Nancy; Cowley, A. P. (1978), "Michigan catalogue of two-dimensional spectral types for the HD stars", University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0, Ann Arbor: Dept. of Astronomy, University of Michigan, 1, Bibcode:1975mcts.book.....H.
  6. ^ a b c d e Gaidos, E.; Mann, A. W.; Lépine, S.; Buccino, A.; James, D.; Ansdell, M.; Petrucci, R.; Mauas, P.; Hilton, E. J. (2014). "Trumpeting M dwarfs with CONCH-SHELL: A catalogue of nearby cool host-stars for habitable exoplanets and life". Monthly Notices of the Royal Astronomical Society. 443 (3): 2561. arXiv:1406.7353. Bibcode:2014MNRAS.443.2561G. doi:10.1093/mnras/stu1313.
  7. ^ 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, A61.
  8. ^ Reiners, A. (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics, 446 (1): 267–277, arXiv:astro-ph/0509399, Bibcode:2006A&A...446..267R, doi:10.1051/0004-6361:20053911.
  9. ^ a b c d David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146.
  10. ^ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  11. ^ Casagrande, L.; et al. (2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy & Astrophysics, 530 (A138): 21, arXiv:1103.4651, Bibcode:2011A&A...530A.138C, doi:10.1051/0004-6361/201016276.
  12. ^ Ammler-von Eiff, M.; Reiners, A. (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: 31, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, A116.
  13. ^ "kap Ret". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-07-14.
  14. ^ Montes, D.; et al. (November 2001), "Late-type members of young stellar kinematic groups - I. Single stars" (PDF), Monthly Notices of the Royal Astronomical Society, 328 (1): 45–63, arXiv:astro-ph/0106537, Bibcode:2001MNRAS.328...45M, doi:10.1046/j.1365-8711.2001.04781.x.
  15. ^ a b Streicher, Magda (December 2009), "Reticulum: The Celestial Crosshairs", Monthly Notes of the Astronomical Society of South Africa, 68 (11–12): 242–246, Bibcode:2009MNSSA..68..242S.
  16. ^ Gáspár, András; et al. (May 2013), "The Collisional Evolution of Debris Disks", The Astrophysical Journal, 768 (1): 29, arXiv:1211.1415, Bibcode:2013ApJ...768...25G, doi:10.1088/0004-637X/768/1/25, 25.