11 Boötis

11 Boötis is a star in the northern constellation of Boötes, located 333 light years away from the Sun. It is near the lower limit of visibility to the naked eye, appearing as a dim, white-hued star with an apparent visual magnitude of 6.23.[2] This body is moving closer to the Earth with a heliocentric radial velocity of −24 km/s.[4] It has a stellar classification of A7 III,[3] matching an evolved A-type giant star. The star is 328[5] million years old with a projected rotational velocity of 123 km/s.[6] It has 1.67[5] times the mass of the Sun and is radiating 22[2] times the Sun's luminosity from its photosphere at an effective temperature of 7,997 K.[5]

11 Boötis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Boötes
Right ascension  14h 01m 10.48139s[1]
Declination +27° 23′ 11.7476″[1]
Apparent magnitude (V) 6.23[2]
Characteristics
Spectral type A7 III[3]
B−V color index 0.193±0.004[2]
Astrometry
Radial velocity (Rv)−24.0±4.3[4] km/s
Proper motion (μ) RA: −79.512[1] mas/yr
Dec.: 18.491[1] mas/yr
Parallax (π)9.8089 ± 0.0827[1] mas
Distance333 ± 3 ly
(101.9 ± 0.9 pc)
Absolute magnitude (MV)1.44[2]
Details
Mass1.67[5] M☉
Luminosity22.11[2] L☉
Surface gravity (log g)3.93[5] cgs
Temperature7,997±272[5] K
Rotational velocity (v sin i)123[6] km/s
Age328[5] Myr
Other designations
11 Boo, BD+28° 2287, HD 122405, HIP 68478, HR 5263, SAO 83130[3]
Database references
SIMBADdata

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.
  3. "11 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved April 28, 2019.
  4. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  5. David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146.
  6. Royer, F.; et al. (October 2002). "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i". Astronomy and Astrophysics. 393: 897–911. arXiv:astro-ph/0205255. Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943.
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