Kappa Arae

In the world of Kappa Arae, there are many facets and aspects that deserve to be explored and analyzed. Whether it is a person, a topic, a date or any other element, its importance and relevance are undeniable. In this article, we will delve into the fascinating universe of Kappa Arae to discover its multiple aspects and understand its impact in different areas. Through a detailed and exhaustive tour, we will explore the different aspects that make Kappa Arae a topic worthy of reflection and study. From its origin to its influence on today's society, we will immerse ourselves in an in-depth analysis that will allow us to better understand the importance of Kappa Arae in the current context.

Kappa Arae
Diagram showing star positions and boundaries of the Ara constellation and its surroundings
The location of κ Arae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 17h 26m 00.04169s[1]
Declination –50° 38′ 00.6417″[1]
Apparent magnitude (V) 5.21[2]
Characteristics
Spectral type G8 III[3]
B−V color index +1.05[2]
Astrometry
Radial velocity (Rv)+17.3[4] km/s
Proper motion (μ) RA: +13.45[1] mas/yr
Dec.: +8.36[1] mas/yr
Parallax (π)7.16±0.40 mas[1]
Distance460 ± 30 ly
(140 ± 8 pc)
Absolute magnitude (MV)–0.58[5]
Details
Radius14[6] R☉
Surface gravity (log g)2.3[5] cgs
Temperature4,950[5] K
Metallicity –0.3[5] dex
Other designations
CD–50° 11269, HD 157457, HIP 85312, HR 6468, SAO 244734.[7]
Database references
SIMBADdata

Kappa Arae (κ Ara, κ Arae) is the Bayer designation for a single[8] star in the southern constellation of Ara. Based upon parallax measurements, it is approximately 460 light-years (140 parsecs) distant from Earth, give or take a 30 light-year margin of error.[1] With an apparent visual magnitude of 5.21,[2] this star is faintly visible to the naked eye.

This is a giant star with a stellar classification of G8 III;[3] its outer envelope has expanded to about 14 times the radius of the Sun.[6] It is radiating energy into space at an effective temperature of 4,950 K.[5] This is hot enough for it to shine with the golden-hued glow of a G-type star.[9]

It has two 14th magnitude optical companions that are at an angular distance of 25 and 30 arcseconds.[citation needed]

References

  1. ^ a b c d e f van Leeuwen, F. (November 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, S2CID 18759600.
  2. ^ a b c 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.
  3. ^ a b 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. ^ Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick (eds.). Determination of Radial Velocities and their Applications. IAU Symposium no. 30. Vol. 30. University of Toronto: International Astronomical Union. p. 57. Bibcode:1967IAUS...30...57E.
  5. ^ a b c d e Jasniewicz, G.; et al. (February 1999), "Late-type giants with infrared excess. I. Lithium abundances", Astronomy and Astrophysics, 342: 831–838, Bibcode:1999A&A...342..831J
  6. ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  7. ^ "kap Ara". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2010-07-30.
  8. ^ 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. S2CID 14878976.
  9. ^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on February 22, 2012, retrieved 2012-01-16.