12 Boötis

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12 Boötis
Boötes constellation map.svg
Red circle.svg

Location of 12 Boötis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 14h 10m 23.93342s[1]
Declination 25° 05′ 30.0394″[1]
Apparent magnitude (V) 4.83[2]
Characteristics
Spectral type F9IVw[3]
U−B color index +0.07[2]
B−V color index +0.54[2]
Astrometry
Radial velocity (Rv) +9.58[4] km/s
Proper motion (μ) RA: -23.43[1] mas/yr
Dec.: -59.79[1] mas/yr
Parallax (π) 26.72 ± 0.21[1] mas
Distance 122.1 ± 1.0 ly
(37.4 ± 0.3 pc)
Absolute magnitude (MV) 1.95[5]
Orbit[6]
Primary 12 Boötis Aa
Companion 12 Boötis Ab
Period (P) 9.604560 days
Semi-major axis (a) 3.4706 mas
Eccentricity (e) 0.19214
Inclination (i) 107.95°
Longitude of the node (Ω) 80.49°
Periastron epoch (T) 2454099.93572
Argument of periastron (ω)
(secondary)
286.832°
Details
Mass 1.63[7] M
Radius 2.9[7] R
Luminosity 14.53[5] L
Surface gravity (log g) 3.73[7] cgs
Temperature 6,310[7] K
Metallicity [Fe/H] +0.02[5] dex
Rotational velocity (v sin i) 15.0[8] km/s
Other designations
d Boötis, 12 Boötis, FK5 522, GC 19127, HIP 69226, HR 5304, HD 123999, GJ 9470, BD+25°2737, SAO 83203, WDS J14104+2506AB, CCDM 14104+2505
Database references
SIMBAD data

12 Boötis is a spectroscopic binary[9] in the constellation Boötes. It is approximately 122 light years from Earth.[1]

The primary component, 12 Boötis A, is a yellow-white F-type subgiant with an apparent magnitude of +4.82. The spectroscopic binary pair completes one orbit around its centre of mass once every 9.6045 days,[3] with an estimated separation of 0.0035".[10] A 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.[3]

References[edit]

  1. ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c 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 c 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. doi:10.1086/323920.  Vizier catalog entry
  4. ^ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727. arXiv:astro-ph/0406573Freely accessible. Bibcode:2004A&A...424..727P. doi:10.1051/0004-6361:20041213. 
  5. ^ a b c Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971Freely accessible. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.  Vizier catalog entry
  6. ^ Konacki, M. (2010). "High-precision Orbital and Physical Parameters of Double-lined Spectroscopic Binary Stars—HD78418, HD123999, HD160922, HD200077, and HD210027". The Astrophysical Journal. 719 (2): 1293–1314. arXiv:0910.4482Freely accessible. Bibcode:2010ApJ...719.1293K. doi:10.1088/0004-637X/719/2/1293. 
  7. ^ a b c d Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555. arXiv:astro-ph/9911002Freely accessible. Bibcode:1999A&A...352..555A.  Vizier catalog entry
  8. ^ Glebocki, R.; Gnacinski, P. (2005). "VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005)". VizieR On-line Data Catalog: III/244. Originally published in: 2005csss...13..571G; 2005yCat.3244....0G. 3244. Bibcode:2005yCat.3244....0G.  Vizier catalog entry
  9. ^ Konacki, Maciej; et al. (2010). "High-precision Orbital and Physical Parameters of Double-lined Spectroscopic Binary Stars—HD78418, HD123999, HD160922, HD200077, and HD210027". The Astrophysical Journal. 719 (2): 1293–1314. arXiv:0910.4482Freely accessible. Bibcode:2010ApJ...719.1293K. doi:10.1088/0004-637X/719/2/1293. 
  10. ^ Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: A69. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774.  Vizier catalog entry