33 Boötis

33 Boötis
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 14h 38m 50.22449s[1]
Declination +44° 24′ 16.1979″[1]
Apparent magnitude (V) 5.39[2]
Characteristics
Spectral type A1 V[3]
B−V color index 0.030±0.003[2]
Astrometry
Radial velocity (Rv)−13.0±4.2[2] km/s
Proper motion (μ) RA: –67.247[1] mas/yr
Dec.: −17.749[1] mas/yr
Parallax (π)17.3936 ± 0.1330 mas[1]
Distance188 ± 1 ly
(57.5 ± 0.4 pc)
Absolute magnitude (MV)1.61[2]
Details
Mass2.25[4] M☉
Luminosity20.94[2] L☉
Surface gravity (log g)4.18[5] cgs
Temperature10,176±346[4] K
Rotational velocity (v sin i)86[4] km/s
Age142[4] Myr
Other designations
33 Boo, BD+45°2204, FK5 540, HD 129002, HIP 71618, HR 5468, SAO 45153[6]
Database references
SIMBADdata

33 Boötis is a single[7] star in the northern constellation Boötes, located 188 light years away from the Sun. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 5.39.[2] The object is moving closer to the Earth with a heliocentric radial velocity of −13 km/s,[2] and is catalogued as a member of the Pleiades supercluster.[8]

This is an ordinary A-type main-sequence star with a stellar classification of A1 V.[3] It is a source of X-ray emission, but early A-type stars are not expected to be an X-ray source so this may indicate it has an undetected companion.[9] 33 Boötis is 142[4] million years old with a projected rotational velocity of 86 km/s.[4] The star has 2.25[4] times the mass of the Sun and is radiating 21[2] times the luminosity of the Sun from its photosphere at an effective temperature of 10,176 K.[4]

References

  1. ^ a b c d e 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. ^ a b c d e f g h 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, S2CID 119257644.
  3. ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
  4. ^ a b c d e f g h 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, S2CID 33401607.
  5. ^ Gebran, M.; et al. (May 2016), "A new method for the inversion of atmospheric parameters of A/Am stars", Astronomy & Astrophysics, 589: 10, arXiv:1603.01146, Bibcode:2016A&A...589A..83G, doi:10.1051/0004-6361/201528052, S2CID 118549566, A83.
  6. ^ "33 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 11, 2019.
  7. ^ De Rosa, R. J.; Patience, J.; Wilson, P. A.; Schneider, A.; Wiktorowicz, S. J.; Vigan, A.; Marois, C.; Song, I.; Macintosh, B.; Graham, J. R.; Doyon, R.; Bessell, M. S.; Thomas, S.; Lai, O. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society, 437 (2): 1216–1240, arXiv:1311.7141, Bibcode:2014MNRAS.437.1216D, doi:10.1093/mnras/stt1932.
  8. ^ Eggen, O. J. (December 1992), "The Kinematics of Young Disk Population Supercluster Members", Astronomical Journal, 104: 2141, Bibcode:1992AJ....104.2141E, doi:10.1086/116389.
  9. ^ De Rosa, R. J.; et al. (July 2011), "The Volume-limited A-Star (VAST) survey - I. Companions and the unexpected X-ray detection of B6-A7 stars", Monthly Notices of the Royal Astronomical Society, 415 (1): 854–866, arXiv:1103.4363, Bibcode:2011MNRAS.415..854D, doi:10.1111/j.1365-2966.2011.18765.x, S2CID 84181878.

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