12 Boötis Explained

12 Boötis is a spectroscopic binary[1] in the constellation Boötes. It is approximately 122 light years from Earth.

12 Boötis is a yellow-white F-type subgiant with an apparent magnitude of +4.82. It is a spectroscopic binary pair which orbit around its centre of mass once every 9.6045 days,[2] with an estimated separation of 0.0035".[3] The two stars have similar masses around, both are slightly hotter than the Sun and about twice as large.

A further companion, 12 Boötis B, was reported with a separation of approximately one arcsecond in 1989, but subsequent surveys have repeatedly failed to detect this companion.[2]

See also

Notes and References

  1. High-precision Orbital and Physical Parameters of Double-lined Spectroscopic Binary Stars—HD78418, HD123999, HD160922, HD200077, and HD210027 . Konacki . Maciej . Muterspaugh . Matthew W. . Kulkarni . Shrinivas R. . Hełminiak . Krzysztof G. . 1 . The Astrophysical Journal . 719 . 2 . 1293–1314 . 2010 . 0910.4482 . 2010ApJ...719.1293K . 10.1088/0004-637X/719/2/1293 . 119253596 .
  2. 2001AJ....122.3466M . 10.1086/323920 . The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog . The Astronomical Journal . 122 . 6 . 3466 . 2001 . Mason . Brian D. . Wycoff . Gary L. . Hartkopf . William I. . Douglass . Geoffrey G. . Worley . Charles E. . free . Vizier catalog entry
  3. 2012A&A...546A..69M . 10.1051/0004-6361/201219774 . Dynamical masses of a selected sample of orbital binaries . Astronomy & Astrophysics . 546 . A69 . 2012 . Malkov . O. Yu. . Tamazian . V. S. . Docobo . J. A. . Chulkov . D. A. . free . Vizier catalog entry

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