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)27.4199 ± 0.1349[6] mas
Distance118.9 ± 0.6 ly
(36.5 ± 0.2 pc)
Absolute magnitude (MV)2.17[7]
Mass1.38[8] M
Radius2.77[6] R
Diameter2.77[6] D
Luminosity11[6] L
Surface gravity (log g)3.87[4] cgs
Temperature6,238[4] K
Rotational velocity (v sin i)26.4[4] km/s
Age2[9] Gyr
Other designations
16 Cep, BD+72° 1009, GC 30800, HD 209369, HIP 108535, HR 8400, SAO 10216[10]
Database references

16 Cephei is a star, about 120 light years from the Sun, in the constellation of Cepheus. It has a spectral type of F5V, a main sequence star somewhat hotter than the sun.

There are several 11th and 12th magnitude stars within a few arc-minutes of 16 Cephei, all of them distant background objects.[11] Only one of these is listed in the Washington Double Star Catalog and Catalog of Components of Double and Multiple Stars as a companion.[12]


  1. 1.0 1.1 1.2 1.3 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. http://www.aanda.org/articles/aa/full/2007/41/aa8357-07/aa8357-07.html.Vizier catalog entry
  2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (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: 79, Bibcode 1962RGOB...51...79E.
  4. 4.0 4.1 4.2 4.3 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, http://goedoc.uni-goettingen.de/goescholar/bitstream/handle/1/9690/aa10377-08.pdf?sequence=2
  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:1606.08053, Bibcode 2006AstL...32..759G, doi:10.1134/S1063773706110065.
  6. 6.0 6.1 6.2 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. arXiv:1804.09365. Bibcode 2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  7. 7.0 7.1 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.
  8. Ligi, R.; Creevey, O.; Mourard, D.; Crida, A.; Lagrange, A. -M.; Nardetto, N.; Perraut, K.; Schultheis, M. et al. (2016). "Radii, masses, and ages of 18 bright stars using interferometry and new estimations of exoplanetary parameters". Astronomy and Astrophysics 586: A94. Bibcode 2016A&A...586A..94L. doi:10.1051/0004-6361/201527054.
  9. Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy and Astrophysics 530: A138. arXiv:1103.4651. Bibcode 2011A&A...530A.138C. doi:10.1051/0004-6361/201016276.
  10. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  11. Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. arXiv:1804.09365. Bibcode 2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
  12. Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466. Bibcode 2001AJ....122.3466M.

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