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10 Ursae Majoris

Star in the constellation Lynx

Star in the constellation Lynx

|b-v=+0.43 |u-b=+0.04

10 Ursae Majoris is a binary star system in the northern constellation of Lynx. It is visible to the naked eye as a faint star with a combined apparent visual magnitude of 3.960. The system is moving further from the Earth with a heliocentric radial velocity of 26.4 km/s.

This is a spectroscopic binary—orbital motion from the two stars can be detected by Doppler shifts in their spectra. In this case, the two stars can also be split by differential astrometry. The magnitude 4.18 primary has a mass of and the fainter secondary, . The primary is an F-type main-sequence star radiating 4.3 times the Sun's luminosity, and the magnitude 6.48 secondary is K-type with 0.6 times the luminosity of the Sun. The two orbit each other every 7691.0 days with an eccentricity of 0.15.

Notes

\sqrt{\biggl(\frac{5,772}{6,740}\biggr)^4 \cdot 4.285} = 1.518\ R_\odot.\sqrt{\biggl(\frac{5,772}{5,250}\biggr)^4 \cdot 0.638} = 0.965\ R_\odot.}}

References

References

  1. van Leeuwen, F.. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics.
  2. Oja, T.. (1991). "UBV photometry of stars whose positions are accurately known. VI". Astronomy and Astrophysics Supplement Series.
  3. "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory.
  4. (2012). "Circumstellar habitable zones of binary-star systems in the solar neighbourhood". Monthly Notices of the Royal Astronomical Society.
  5. Wilson, Ralph Elmer. (1953). "General catalogue of stellar radial velocities". Washington.
  6. {{cite XHIP. 44248
  7. (2010). "The Phases Differential Astrometry Data Archive. Ii. Updated Binary Star Orbits and a Long Period Eclipsing Binary". The Astronomical Journal.
  8. "10 UMa".
  9. Ridpath, Ian. "Star Tales (online edition)".
  10. (June 1984). "A Systematic Search for Members of the Hyades Supercluster - Part Two - the Visual Binaries". Astronomical Journal.
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f-type-main-sequence-stars k-type-main-sequence-stars spectroscopic-binaries hyades-stream lynx-(constellation) durchmusterung-objects flamsteed-objects gliese-and-gj-objects henry-draper-catalogue-objects hipparcos-objects bright-star-catalogue-objects
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