16 Cephei

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16 Cephei A
Observation data
Epoch J2000      Equinox J2000
Constellation Cepheus
Right ascension 21h 59m 14.96555s[1]
Declination +73° 10′ 47.6212″[1]
Apparent magnitude (V) 5.036[2]
Spectral type F5V[3]
B−V color index 0.41[4]
Radial velocity (Rv)−20.6±0.4[5] km/s
Proper motion (μ) RA: −68.62±0.16[1] mas/yr
Dec.: −160.18±0.16[1] mas/yr
Parallax (π)27.23 ± 0.17[1] mas
Distance119.8 ± 0.7 ly
(36.7 ± 0.2 pc)
Absolute magnitude (MV)2.17[6]
Surface gravity (log g)3.87[4] cgs
Temperature6,238[4] K
Rotational velocity (v sin i)26.4[4] km/s
Other designations
16 Cep, BD+72° 1009, GC 30800, HD 209369, HIP 108535, HR 8400, SAO 10216[7]
Database references

16 Cephei is a double star, about 120 light years from the Sun, in the constellation of Cepheus. It is composed of two stars of spectral type F5V,[8] which might be an optical double system.[9]


  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. 
  3. ^ Eggen, O. J. (1962), "Space-velocity vectors for 3483 stars with proper motion and radial velocity", Royal Observatory Bulletin, 51, Bibcode:1962RGOB...51...79E. 
  4. ^ a b c d Schröder, C.; Reiners, A.; Schmitt, J. H. M. M.- (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo", Astronomy and Astrophysics, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377 
  5. ^ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053Freely accessible, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065. 
  6. ^ a b Griffin, R. F.; Suchkov, A. A. (2003). "The Nature of Overluminous F Stars Observed in a Radial-Velocity Survey". The Astrophysical Journal Supplement Series. 147 (1): 103–44. Bibcode:2003ApJS..147..103G. doi:10.1086/367855. 
  7. ^ "16 Cep". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-01-27. 
  8. ^ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy and Astrophysics. 367: 521–524. arXiv:astro-ph/0012289Freely accessible. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. 
  9. ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878Freely accessible. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.