Astronomy:Omega Boötis
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Boötes |
| Right ascension | 15h 02m 06.509s[1] |
| Declination | +25° 00′ 29.30″[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) | +12.50±0.15[1] km/s |
| Proper motion (μ) | RA: −5.535[1] mas/yr Dec.: −49.18[1] mas/yr |
| Parallax (π) | 8.5271 ± 0.1118[1] mas |
| Distance | 382 ± 5 ly (117 ± 2 pc) |
| Absolute magnitude (MV) | −0.41[4] |
| Details[5] | |
| Mass | 1.65[6] M☉ |
| Radius | 38.51±1.09 R☉ |
| Luminosity | 340±12 L☉ |
| Surface gravity (log g) | 1.37±0.06 cgs |
| Temperature | 3,994±56 K |
| Metallicity [Fe/H] | −0.10±0.03 dex |
| Age | 2.99[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Omega Boötis is a solitary,[8] orange-hued star in the northern constellation of Boötes. Its name is a Bayer designation that is Latinized from ω Boötis, and abbreviated Omega Boo or ω Boo. This 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 8.53 mas as seen from the Earth,[1] it is located about 382 light-years (117 pc) from the Sun. The star is drifting further away with a radial velocity of +12.5 km/s.[1]
This star is three[6] 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[6] times the mass of the Sun and has expanded to 39 times the Sun's radius. The star is radiating 340 times the Sun's luminosity from its photosphere at an effective temperature of about 3,994 K.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 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, doi:10.1093/mnras/172.3.667, Bibcode: 1975MNRAS.172..667J.
- ↑ 3.0 3.1 Morgan, W. W.; Keenan, P. C. (1973), "Spectral Classification", Annual Review of Astronomy and Astrophysics 11: 29, doi:10.1146/annurev.aa.11.090173.000333, Bibcode: 1973ARA&A..11...29M.
- ↑ Luck, R. Earle; Heiter, Ulrike (June 2007), "Giants in the Local Region", The Astronomical Journal 133 (6): 2464–2486, doi:10.1086/513194, Bibcode: 2007AJ....133.2464L
- ↑ 5.0 5.1 Soubiran, C. et al. (February 2024), "Gaia FGK benchmark stars: Fundamental Teff and log g of the third version", Astronomy and Astrophysics 682: A145, doi:10.1051/0004-6361/202347136, ISSN 0004-6361, Bibcode: 2024A&A...682A.145S Omega Boötis' database entry at VizieR.
- ↑ 6.0 6.1 6.2 6.3 Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal 150 (3): 88, doi:10.1088/0004-6256/150/3/88, Bibcode: 2015AJ....150...88L.
- ↑ "ome Boo". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=ome+Boo.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
External links
- Hoffleit (1991), "HR 5600", Bright Star Catalogue, http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205600, retrieved 2017-09-11.
- "ome Boo", Aladin previewer (Centre de Données astronomiques de Strasbourg), http://aladin.u-strasbg.fr/AladinPreview?-c=15+02+06.5083%2B25+00+29.298&ident=*+ome+Boo&submit=Aladin+previewer, retrieved 2017-09-11.
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