Omega Boötis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Boötes |
| Right ascension | 15h 02m 06.50862s[1] |
| Declination | +25° 00′ 29.2782″[1] |
| Apparent magnitude (V) | +4.82[2] |
| Characteristics | |
| Spectral type | K4 III[3] |
| U−B color index | +1.83[2] |
| B−V color index | +1.50[2] |
| Astrometry | |
| Radial velocity (Rv) | +12.76±0.15[1] km/s |
| Proper motion (μ) | RA: −5.206[1] mas/yr Dec.: −47.799[1] mas/yr |
| Parallax (π) | 8.7483 ± 0.2241 mas[1] |
| Distance | 373 ± 10 ly (114 ± 3 pc) |
| Absolute magnitude (MV) | −0.41[4] |
| Details | |
| Mass | 1.65[5] M☉ |
| Radius | 39.24+1.19 −4.17[1] R☉ |
| Luminosity | 355±10[1] L☉ |
| Surface gravity (log g) | 1.88±0.24[6] cgs |
| Temperature | 3,962±35[5] K |
| Metallicity [Fe/H] | 0.06±0.08[6] dex |
| Age | 2.99[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Omega Boötis, its name Latinized from ω Boötis, is a solitary,[8] orange-hued star in the northern constellation of Boötes. It is a dim star but visible to the naked eye with an apparent visual magnitude of +4.82.[2] Based upon an annual parallax shift of 8.75 mas as seen from the Earth, it is located about 373 light years from the Sun. The star is drifting further away with a radial velocity of +13 km/s.[1]
This star is three[5] billion years old with a stellar classification of K4 III,[3] matching an evolved K-type giant star that has consume the supply of hydrogen at its core. It has an estimated 1.65[5] times the mass of the Sun and has expanded to 39[1] times the Sun's radius. The star is radiating 355[1] times the Sun's luminosity from its photosphere at an effective temperature of about 3,962 K.[5]
References
- ^ a b c d e f g h i j k 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 Jennens, P. A.; Helfer, H. L. (September 1975), "A new photometric metal abundance and luminosity calibration for field G and K giants", Monthly Notices of the Royal Astronomical Society, 172 (3): 667–679, Bibcode:1975MNRAS.172..667J, doi:10.1093/mnras/172.3.667.
- ^ a b Morgan, W. W.; Keenan, P. C. (1973), "Spectral Classification", Annual Review of Astronomy and Astrophysics, 11: 29, Bibcode:1973ARA&A..11...29M, doi:10.1146/annurev.aa.11.090173.000333.
- ^ Luck, R. Earle; Heiter, Ulrike (June 2007), "Giants in the Local Region", The Astronomical Journal, 133 (6): 2464–2486, Bibcode:2007AJ....133.2464L, doi:10.1086/513194
- ^ a b c d e f Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114.
- ^ a b Prugniel, Ph.; et al. (2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics, 531: A165, arXiv:1104.4952, Bibcode:2011A&A...531A.165P, doi:10.1051/0004-6361/201116769, S2CID 54940439, A165.
- ^ "ome Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-09.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
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External links
- Hoffleit; et al. (1991), "HR 5600", Bright Star Catalogue (5th Revised ed.), retrieved 2017-09-11.
- "ome Boo", Aladin previewer, Centre de Données astronomiques de Strasbourg, retrieved 2017-09-11.
