Astronomy:Kappa2 Sculptoris

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Short description: Star in the constellation Sculptor


For other star systems with this Bayer designation, see κ Sculptoris.
Kappa2 Sculptoris
Observation data
Equinox J2000.0]] (ICRS)
Constellation Sculptor[1]
Right ascension  00h 11m 34.42072s[2]
Declination −27° 47′ 58.9908″[2]
Apparent magnitude (V) +5.42[3]
Characteristics
Evolutionary stage red giant branch[2]
Spectral type K2 III[4]
B−V color index +1.35[3]
Astrometry
Radial velocity (Rv)−5.6±0.8[5] km/s
Proper motion (μ) RA: +5.058[2] mas/yr
Dec.: +12.900[2] mas/yr
Parallax (π)5.7132 ± 0.0814[2] mas
Distance571 ± 8 ly
(175 ± 2 pc)
Absolute magnitude (MV)−1.46[1]
Details
Mass4.2[2] M☉
Radius31[6] R☉
Luminosity325[6] L☉
Surface gravity (log g)1.34[7] cgs
Temperature4,393[6] K
Metallicity [Fe/H]−0.40[7] dex
Rotational velocity (v sin i)2.2[8] km/s
Age1.63[9] Gyr
Other designations
κ2 Scl, CD−28°26, FK5 5, HD 720, HIP 930, HR 34, SAO 166103, WDS J00116-2748A[10]
Database references
SIMBADdata

Kappa2 Sculptoris, Latinized from κ2 Sculptoris, is a solitary,[11] orange-hued star in the southern constellation of Sculptor. It is faintly visible to the naked eye, with a combined apparent visual magnitude of +5.42.[3] Based upon an annual parallax shift of 5.7 mas as measured from Earth,[2] it is located approximately 571 light years from the Sun.

This is an evolved K-type giant star with a stellar classification of K2 III.[4] It is radiating 325 times the solar luminosity from its photosphere at an effective temperature of 4,393.[6] There is a faint optical companion with visual magnitude 21.0 located at an angular separation of 44.2 arc seconds along a position angle of 289°, as of 2010.[12]

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa 27: 11, Bibcode: 1968MNSSA..27...11C. 
  4. ↑ 4.0 4.1 Houk, Nancy (1979), "Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars", Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume_3. Declinations -40.0° to -26.0° (Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan) 3, Bibcode: 1982mcts.book.....H. 
  5. ↑ 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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D. 
  6. ↑ 6.0 6.1 6.2 6.3 Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel et al. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series 268 (1): 4. doi:10.3847/1538-4365/acdee5. Bibcode: 2023ApJS..268....4F. 
  7. ↑ 7.0 7.1 Matsuno, Tadafumi; Starkenburg, Else; Balbinot, Eduardo; Helmi, Amina (2024). "Improving metallicity estimates for very metal-poor stars in the Gaia DR3 GSP-Spec catalog". Astronomy and Astrophysics 685: A59. doi:10.1051/0004-6361/202245762. Bibcode: 2024A&A...685A..59M. 
  8. ↑ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. Bibcode: 2014A&A...561A.126D. 
  9. ↑ Huang, Yang; Beers, Timothy C.; Wolf, Christian; Lee, Young Sun; Onken, Christopher A.; Yuan, Haibo; Shank, Derek; Zhang, Huawei et al. (2022). "Beyond Spectroscopy. I. Metallicities, Distances, and Age Estimates for over 20 Million Stars from SMSS DR2 and Gaia EDR3". The Astrophysical Journal 925 (2): 164. doi:10.3847/1538-4357/ac21cb. Bibcode: 2022ApJ...925..164H. 
  10. ↑ "kap02 Scl". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=kap02+Scl. 
  11. ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  12. ↑ Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22 



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