Astronomy:33 Boötis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas |
| Distance | 188 ± 1 ly (57.5 ± 0.4 pc) |
| Absolute magnitude (MV) | 1.61[2] |
| Details | |
| Mass | 2.25[4] M☉ |
| Luminosity | 20.94[2] L☉ |
| Surface gravity (log g) | 4.18[5] cgs |
| Temperature | 10,176±346[4] K |
| Rotational velocity (v sin i) | 86[4] km/s |
| Age | 142[4] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 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, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ Gebran, M. et al. (May 2016), "A new method for the inversion of atmospheric parameters of A/Am stars", Astronomy & Astrophysics 589: 10, doi:10.1051/0004-6361/201528052, A83, Bibcode: 2016A&A...589A..83G.
- ↑ "33 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=33+Boo.
- ↑ De Rosa, R. J.; Patience, J.; Wilson, P. A.; Schneider, A.; Wiktorowicz, S. J.; Vigan, A.; Marois, C.; Song, I. et al. (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, doi:10.1093/mnras/stt1932, Bibcode: 2014MNRAS.437.1216D.
- ↑ Eggen, O. J. (December 1992), "The Kinematics of Young Disk Population Supercluster Members", Astronomical Journal 104: 2141, doi:10.1086/116389, Bibcode: 1992AJ....104.2141E.
- ↑ 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, doi:10.1111/j.1365-2966.2011.18765.x, Bibcode: 2011MNRAS.415..854D.
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