| 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] |
| 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
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
| 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] |
| 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
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
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