Sigma Capricorni

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Sigma Capricorni
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Capricornus
Right ascension 20h 19m 23.60425s[1]
Declination −19° 07′ 06.7233″[1]
Apparent magnitude (V) +5.31[2]
Spectral type K2 III[3]
U−B color index +1.56[2]
B−V color index +1.43[2]
Proper motion (μ) RA: +8.07[1] mas/yr
Dec.: −11.31[1] mas/yr
Parallax (π)2.91 ± 0.28[1] mas
Distance1,100 ± 100 ly
(340 ± 30 pc)
Absolute magnitude (MV)−2.38[4]
Mass6.3±0.7[5] M
Luminosity1,561[6] L
Temperature4,354[6] K
Age60.5±17.2[5] Myr
Other designations
σ Cap, 7 Cap, BD−19° 5776, FK5 3625, HD 193150, HIP 100195, HR 7761, SAO 163445[7]
Database references

Sigma Capricorni, Latinized from σ Capricorni, is a solitary[8] star in the southern constellation of Capricornus. It is an evolved, orange-hued K-type giant star with an apparent magnitude of +5.31.[2] Sigma Capricorni is located approximately 1,100 light years from Earth.


  1. ^ a b c d e 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 Fernie, J. D. (May 1983), "New UBVRI photometry for 900 supergiants", Astrophysical Journal Supplement Series, 52: 7–22, Bibcode:1983ApJS...52....7F, doi:10.1086/190856.
  3. ^ Houk, N.; Smith-Moore, M. (1988), Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, 4,
  4. ^ 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.
  5. ^ a b Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x.
  6. ^ a b McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427: 343, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
  7. ^ "* sig Cap". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-05-12.
  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.