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15 Lyncis

Star in the constellation Lynx

Star in the constellation Lynx

|b-v=+0.85 |u-b=+0.51 15 Lyncis is a binary star system in the northern constellation of Lynx. It is visible to the naked eye as a faint point of light with a combined apparent visual magnitude of 4.35. Based on the system's parallax, it is located 178 light-years (54.7 parsecs) away. The pair are moving away from the Earth with a heliocentric radial velocity of +2 km/s.

A telescope reveals it is formed by two yellowish stars of magnitudes 4.7 and 5.8 that are 0.9 arcseconds apart. The two stars orbit each other every 262 years and the orbital eccentricity is 0.74. The components are a magnitude 4.7 evolved giant star of spectral type G8III, and a magnitude 5.8 F-type main-sequence star of spectral type F8V. The former has exhausted the hydrogen at its core, causing it to expand to 8 times the Sun's radius. It is radiating 40 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,164 K.

References

References

  1. van Leeuwen, F.. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics.
  2. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues.
  3. (2012). "Dynamical Masses of a Selected Sample of Orbital Binaries". Astronomy and Astrophysics.
  4. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data.
  5. (2008). "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity". The Astronomical Journal.
  6. "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory.
  7. Monks, Neale. (2010). "Go-To Telescopes Under Suburban Skies". [[Springer Science & Business Media]].
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g-type-giants f-type-main-sequence-stars binary-stars lynx-(constellation) durchmusterung-objects flamsteed-objects henry-draper-catalogue-objects hipparcos-objects bright-star-catalogue-objects
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