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12 Boötis

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(Redirected from D Boötis) This article is about d Boötis. Not to be confused with δ Boötis. Binary in the constellation Boötes
12 Boötis
Location of 12 Boötis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 14 10 23.93342
Declination 25° 05′ 30.0394″
Apparent magnitude (V) 4.83
Characteristics
Spectral type F9IVw
U−B color index +0.07
B−V color index +0.54
Astrometry
Radial velocity (Rv)+9.646±0.013 km/s
Proper motion (μ) RA: −23.43 mas/yr
Dec.: −59.79 mas/yr
Parallax (π)27.917 ± 0.044 mas
Distance116.8 ± 0.2 ly
(35.82 ± 0.06 pc)
Absolute magnitude (MV)2.00
Orbit
Primary12 Boo Aa
Companion12 Boo Ab
Period (P)9.6045601±0.0000036 d
Semi-major axis (a)3.4706±0.0055 mas
Eccentricity (e)0.19214±0.00015
Inclination (i)107.95±0.12°
Longitude of the node (Ω)80.49±0.10°
Periastron epoch (T)2,454,100.43572±0.00070
Argument of periastron (ω)
(secondary)
286.832±0.029°
Semi-amplitude (K1)
(primary)
67.189±0.011 km/s
Semi-amplitude (K2)
(secondary)
69.311±0.014 km/s
Details
12 Boo Aa
Mass1.4109±0.0028 M
Radius2.450 R
Luminosity7.531 L
Surface gravity (log g)3.73 cgs
Temperature6115 K
Metallicity −0.065 dex
12 Boo Ab
Mass1.3677±0.0028 M
Radius1.901 R
Luminosity4.692 L
Temperature6200 K
Metallicity −0.065 dex
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
SIMBADdata

12 Boötis is a spectroscopic binary 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, with an estimated separation of 0.0035". The two stars have similar masses around 1.4 M, 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.

References

  1. ^ Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Vizier catalog entry
  2. ^ 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. ^ 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. ^ 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:0910.4482. Bibcode:2010ApJ...719.1293K. doi:10.1088/0004-637X/719/2/1293. S2CID 119253596.
  5. ^ 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: 555–562. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. Vizier catalog entry
  6. ^ Ball, Warrick H.; Miglio, Andrea; Chaplin, William J.; Stassun, Keivan G.; García, Rafael; González-Cuesta, Lucia; Mathur, Savita; Appourchaux, Thierry; Benomar, Othman; Buzasi, Derek L.; Jiang (姜晨), Chen; Kayhan, Cenk; Örtel, Sibel; Çelik Orhan, Zeynep; Yıldız, Mutlu; Ong (王加冕), J M Joel; Basu, Sarbani (2022). "Solar-like oscillations and ellipsoidal variations in TESS observations of the binary 12 Boötis". Monthly Notices of the Royal Astronomical Society. 516 (3): 3709–3714. arXiv:2208.02302. Bibcode:2022MNRAS.516.3709B. doi:10.1093/mnras/stac2212.
  7. 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:0910.4482. Bibcode:2010ApJ...719.1293K. doi:10.1088/0004-637X/719/2/1293. S2CID 119253596.
  8. 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

See also

Constellation of Boötes
Stars
Bayer
Flamsteed
Variable
HD
Other
Exoplanets
Star clusters
Galaxies
NGC
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