11 Boötis
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 01m 10.48072s[1] |
| Declination | +27° 23′ 11.7452″[1] |
| Apparent magnitude (V) | 6.23[2] |
| Characteristics | |
| Spectral type | A7 III[3] |
| B−V color index | 0.193±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | −24.0±4.3[4] km/s |
| Proper motion (μ) | RA: −78.929[1] mas/yr Dec.: +18.638[1] mas/yr |
| Parallax (π) | 9.8333 ± 0.0866 mas[1] |
| Distance | 332 ± 3 ly (101.7 ± 0.9 pc) |
| Absolute magnitude (MV) | 1.44[2] |
| Details | |
| Mass | 1.67[5] M☉ |
| Radius | 2.6[1] R☉ |
| Luminosity | 64[1] L☉ |
| Surface gravity (log g) | 3.93[5] cgs |
| Temperature | 7,997±272[5] K |
| Metallicity | −0.02[6] |
| Rotational velocity (v sin i) | 123[7] km/s |
| Age | 328[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
11 Boötis is a giant star in the northern constellation of Boötes, located about 332 light years away from the Sun. It is near the lower limit of visibility to the naked eye, appearing as a dim, white-hued star with an apparent visual magnitude of 6.23.[2] This body is moving closer to the Earth with a heliocentric radial velocity of −24 km/s.[4]
Properties
[edit]It has a stellar classification of A7 III,[3] matching an evolved A-type giant star. The star is 328[5] million years old with a projected rotational velocity of 123 km/s.[7] It has 1.67[5] times the mass of the Sun and is radiating 64 times the Sun's luminosity from its photosphere at an effective temperature of 7,997 K.[5]
References
[edit]- ^ a b c d e f g Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d 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 c "11 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved April 28, 2019.
- ^ a b Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
- ^ a b c d e f g 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.
- ^ Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. eISSN 1562-6873. ISSN 1063-7737.
- ^ a b Royer, F.; et al. (October 2002). "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i". Astronomy and Astrophysics. 393: 897–911. arXiv:astro-ph/0205255. Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943. S2CID 14070763.
