11 Andromedae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 19m 29.80701s[1] |
| Declination | +48° 37′ 31.1615″[1] |
| Apparent magnitude (V) | 5.44[2] |
| Characteristics | |
| Spectral type | K0 III[3] |
| U−B color index | +0.82[4] |
| B−V color index | +1.014±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | +9.99±0.14[1] km/s |
| Proper motion (μ) | RA: +22.597[1] mas/yr Dec.: +52.689[1] mas/yr |
| Parallax (π) | 11.5097 ± 0.0858[1] mas |
| Distance | 283 ± 2 ly (86.9 ± 0.6 pc) |
| Absolute magnitude (MV) | 0.73[2] |
| Details | |
| Mass | 2.57[5] M☉ |
| Radius | 12[6] R☉ |
| Luminosity | 62.86[2] L☉ |
| Surface gravity (log g) | 2.61[5] cgs |
| Temperature | 4,874[5] K |
| Metallicity [Fe/H] | −0.13±0.07[7] dex |
| Rotational velocity (v sin i) | 1.0[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
11 Andromedae, abbreviated 11 And, is a single,[10] orange-hued star in the northern constellation of Andromeda. 11 Andromedae is the Flamsteed designation. It has an apparent visual magnitude of 5.44,[2] which is bright enough to be faintly visible to the naked eye. An annual parallax shift of 11.5 mas[1] yields a distance estimate of 283 light years. It is moving further from the Earth with a heliocentric radial velocity of +10 km/s.[1]
This is an evolved giant star with a stellar classification of K0 III,[3] which means it has exhausted the supply of hydrogen at its core and turned off the main sequence. It has an estimated 2.57[5] times the mass of the Sun and has expanded to around 12[6] times the Sun's radius. It is radiating 63[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,874 km/s.[5]
References
- 1 2 3 4 5 6 7 8 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.
- 1 2 3 4 5 6 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.
- 1 2 Griffin, R. F.; Redman, R. O. (1960), "Photoelectric measurements of the lambda 4200 A CN band and the G band in G8-K5 spectra", Monthly Notices of the Royal Astronomical Society, 120: 287, Bibcode:1960MNRAS.120..287G, doi:10.1093/mnras/120.4.287.
- ↑ Hoffleit, D.; Warren, Jr., W. H., "HR 8874, database entry", The Bright Star Catalogue (5th Revised (Preliminary Version) ed.), CDS. ID V/50. Accessed on line August 21, 2008.
- 1 2 3 4 5 Liu, Y. J.; et al. (April 2014), "The Lithium Abundances of a Large Sample of Red Giants", The Astrophysical Journal, 785 (2): 12, arXiv:1404.1687, Bibcode:2014ApJ...785...94L, doi:10.1088/0004-637X/785/2/94, 94.
- 1 2 Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451
- ↑ Gáspár, András; et al. (2016), "The Correlation between Metallicity and Debris Disk Mass", The Astrophysical Journal, 826 (2): 171, arXiv:1604.07403, Bibcode:2016ApJ...826..171G, doi:10.3847/0004-637X/826/2/171.
- ↑ De Medeiros, J. R.; et al. (November 2000), "Rotation and lithium in single giant stars", Astronomy and Astrophysics, 363: 239–243, arXiv:astro-ph/0010273, Bibcode:2000A&A...363..239D.
- ↑ "11 And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved September 18, 2018.
- ↑ 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.