| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14 38 50.22449 |
| Declination | +44° 24′ 16.1979″ |
| Apparent magnitude (V) | 5.39 |
| Characteristics | |
| Spectral type | A1 V |
| B−V color index | 0.030±0.003 |
| Astrometry | |
| Radial velocity (Rv) | −13.0±4.2 km/s |
| Proper motion (μ) | RA: –67.247 mas/yr Dec.: −17.749 mas/yr |
| Parallax (π) | 17.3936 ± 0.1330 mas |
| Distance | 188 ± 1 ly (57.5 ± 0.4 pc) |
| Absolute magnitude (MV) | 1.61 |
| Details | |
| Mass | 2.25 M☉ |
| Luminosity | 20.94 L☉ |
| Surface gravity (log g) | 4.18 cgs |
| Temperature | 10,176±346 K |
| Rotational velocity (v sin i) | 86 km/s |
| Age | 142 Myr |
| Other designations | |
| 33 Boo, BD+45°2204, FK5 540, HD 129002, HIP 71618, HR 5468, SAO 45153 | |
| Database references | |
| SIMBAD | data |
33 Boötis is a single 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. The object is moving closer to the Earth with a heliocentric radial velocity of −13 km/s, and is catalogued as a member of the Pleiades supercluster.
This is an ordinary A-type main-sequence star with a stellar classification of A1 V. 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. 33 Boötis is 142 million years old with a projected rotational velocity of 86 km/s. The star has 2.25 times the mass of the Sun and is radiating 21 times the luminosity of the Sun from its photosphere at an effective temperature of 10,176 K.
References
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- 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.
- "33 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 11, 2019.
- 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.
- 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.
- 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.
