15 Lyncis

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15 Lyncis
Observation data
Epoch J2000      Equinox J2000
Constellation Lynx
Right ascension 06h 57m 16.60526s[1]
Declination +58° 25′ 21.9404″[1]
Apparent magnitude (V) 4.35[2] (4.7 / 5.8)[3]
Spectral type G8III + F8V[4]
U−B color index +0.51[5]
B−V color index +0.85[5]
Radial velocity (Rv)1.86 ± 0.28[6] km/s
Proper motion (μ) RA: 6.08[1] mas/yr
Dec.: -122.83[1] mas/yr
Parallax (π)18.29 ± 0.25[1] mas
Distance178 ± 2 ly
(54.7 ± 0.7 pc)
Period (P)262.0 yr
Semi-major axis (a)1.19″
Eccentricity (e)0.74
Inclination (i)78.0°
Longitude of the node (Ω)43.4°
Periastron epoch (T)B 1992.68
Argument of periastron (ω)
Radius8[6] R
Luminosity40[6] L
Surface gravity (log g)3.0[6] cgs
Temperature5164 ± 5[6] K
Metallicity [Fe/H]0.05[6] dex
Other designations
BD+58° 982, HD 50522, HIP 33449, HR 2560, SAO 26051
Database references

15 Lyncis (15 Lyn) is a star in the constellation Lynx. Its combined apparent magnitude is 4.35.[2] Based on the system's parallax, it is located 178 light-years (54.7 parsecs) away.[1]

A telescope reveals it is formed by two yellowish stars of magnitudes 4.7 and 5.8 that are 0.9 arcseconds apart.[3] The components are a yellow giant of spectral type G8III, and an F-type main sequence star of spectral type F8V.[4] The two stars orbit each other every 262 years and the orbital eccentricity is 0.74.[7]


  1. ^ a b c d e f van Leeuwen, F.; et al. (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. 
  2. ^ a b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D. 
  3. ^ a b Monks, Neale (2010). Go-To Telescopes Under Suburban Skies. New York, New York: Springer Science & Business Media. p. 58. ISBN 9781441968517. 
  4. ^ a b Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (2012). "Dynamical Masses of a Selected Sample of Orbital Binaries". Astronomy and Astrophysics. 546: 5. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774. A69. 
  5. ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M. 
  6. ^ a b c d e f Massarotti, Alessandro; Latham, David W.; Stefanik, Robert P.; Fogel, Jeffrey (2008). "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity". The Astronomical Journal. 135: 209. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209. 
  7. ^ a b "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Retrieved 30 July 2017.