Kappa Reticuli
| |
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
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Constellation | Reticulum |
Right ascension | 03h 29m 22.67724s[1] |
Declination | −62° 56′ 15.0991″[1] |
Apparent magnitude (V) | +4.71[2] + 10.7[3] |
Characteristics | |
Spectral type | F3 V[4] or F3 IV/V[5] + M[6] |
U−B color index | −0.04[2] |
B−V color index | +0.39[2] |
Astrometry | |
Radial velocity (Rv) | ±0.4 +12.5[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 |
Distance | 70.7 ± 0.2 ly (21.68 ± 0.06 pc) |
Absolute magnitude (MV) | +2.98[8] |
Details | |
κ Ret A | |
Mass | 1.32[9] M☉ |
Radius | 1.1[6] R☉ |
Surface gravity (log g) | 4.31[9] cgs |
Temperature | ±231 6,796[9] K |
Metallicity [Fe/H] | −0.07[10] dex |
Rotational velocity (v sin i) | ±0.7 13.5[11] km/s |
Age | 848[9] Myr |
κ Ret B | |
Radius | 0.57[6] R☉ |
Other designations | |
Database references | |
SIMBAD | data |
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.[13]
Houk and Cowley (1978) catalogued the yellow-hued[14] 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.[15] The secondary, component B, is an orange-hued[14] star with a visual magnitude of 10.4 at an angular separation of 54 arc seconds from the primary.[3]
References
- 1 2 3 4 5 6 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357.
- 1 2 3 4 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
- 1 2 3 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, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.
- 1 2 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, Bibcode:2006AJ....132..161G, arXiv:astro-ph/0603770 , doi:10.1086/504637.
- 1 2 Houk, Nancy; Cowley, A. P. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.
- 1 2 3 Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367: 521–524, Bibcode:2001A&A...367..521P, arXiv:astro-ph/0012289 , doi:10.1051/0004-6361:20000451.
- ↑ 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, Bibcode:2012A&A...546A..61D, arXiv:1208.3048 , doi:10.1051/0004-6361/201219219, A61.
- ↑ Reiners, A. (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics, 446 (1): 267–277, Bibcode:2006A&A...446..267R, arXiv:astro-ph/0509399 , doi:10.1051/0004-6361:20053911.
- 1 2 3 4 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, Bibcode:2015ApJ...804..146D, arXiv:1501.03154 , doi:10.1088/0004-637X/804/2/146.
- ↑ 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, Bibcode:2011A&A...530A.138C, arXiv:1103.4651 , doi:10.1051/0004-6361/201016276.
- ↑ 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, Bibcode:2012A&A...542A.116A, arXiv:1204.2459 , doi:10.1051/0004-6361/201118724, A116.
- ↑ "kap Ret". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-07-14.
- ↑ Montes, D.; et al. (November 2001), "Late-type members of young stellar kinematic groups - I. Single stars", Monthly Notices of the Royal Astronomical Society, 328 (1): 45–63, Bibcode:2001MNRAS.328...45M, arXiv:astro-ph/0106537 , doi:10.1046/j.1365-8711.2001.04781.x.
- 1 2 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.
- ↑ Gáspár, András; et al. (May 2013), "The Collisional Evolution of Debris Disks", The Astrophysical Journal, 768 (1): 29, Bibcode:2013ApJ...768...25G, arXiv:1211.1415 , doi:10.1088/0004-637X/768/1/25, 25.