11 Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 18h 59m 05.74018s[1] |
| Declination | +13° 37′ 20.0807″[1] |
| Apparent magnitude (V) | 5.220[2] |
| Characteristics | |
| Spectral type | F8 V[3] |
| U−B color index | +0.07[4] |
| B−V color index | +0.53[4] |
| R−I color index | 0.3 |
| Astrometry | |
| Radial velocity (Rv) | +13.6[2] km/s |
| Proper motion (μ) | RA: +18.86[1] mas/yr Dec.: –125.16[1] mas/yr |
| Parallax (π) | 20.65 ± 0.25[1] mas |
| Distance | 158 ± 2 ly (48.4 ± 0.6 pc) |
| Absolute magnitude (MV) | 2.96[5] |
| Details | |
| Luminosity | 19[6] L☉ |
| Surface gravity (log g) | 3.94[5] cgs |
| Temperature | 6,074[5] K |
| Metallicity [Fe/H] | –0.07[5] dex |
| Rotational velocity (v sin i) | 24.6 ± 0.7[7] km/s |
| Age | 1.5[2] Gyr |
| Other designations | |
11 Aquilae (abbreviated 11 Aql) is a single[9] star in the equatorial constellation of Aquila. 11 Aquilae is the Flamsteed designation. It has an apparent visual magnitude of 5.2,[2] which means it is faintly visible to the naked eye. Based upon an annual parallax shift of 20.65 mas,[1] the distance to this star is approximately 158 light-years (48 parsecs). The brightness of this star is diminished by 0.33 in magnitude because of extinction from interstellar gas and dust.[6]
This is an F-type main sequence star with a stellar classification of F8 V.[3] It is radiating about 19[6] times the luminosity of the Sun from its outer atmosphere at an effective temperature of 6,074 K,[5] giving it the yellow-white glow of an F-type star.[10] 11 Aquilae has been listed as a candidate for membership in the Ursa Major Moving Group, but most likely does not belong to that association.[11]
References
- 1 2 3 4 5 6 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- 1 2 3 4 Holmberg, J.; Nordstrom, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.
- 1 2 Eggen, O. J. (1962), "Space-velocity vectors for 3483 stars with proper motion and radial velocity", Royal Observatory Bulletin 51, Bibcode:1962RGOB...51...79E.
- 1 2 Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series 34: 1–49, Bibcode:1978A&AS...34....1N.
- 1 2 3 4 5 Balachandran, Suchitra (May 1, 1990), "Lithium depletion and rotation in main-sequence stars", Astrophysical Journal, Part 1 354: 310–332, Bibcode:1990ApJ...354..310B, doi:10.1086/168691.
- 1 2 3 van Belle, G. T.; et al. (May 2008), "The Palomar Testbed Interferometer Calibrator Catalog", The Astrophysical Journal Supplement Series 176 (1): 276–292, arXiv:0711.4194, Bibcode:2008ApJS..176..276V, doi:10.1086/526548.
- ↑ Reiners, A.; Schmitt, J. H. M. M. (February 2003), "Rotation and differential rotation in field F- and G-type stars", Astronomy and Astrophysics 398: 647–661, Bibcode:2003A&A...398..647R, doi:10.1051/0004-6361:20021642.
- ↑ "11 Aql -- Variable Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-26.
- ↑ 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.
- ↑ "The Colour of Stars", Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, retrieved 2012-01-16.
- ↑ King, Jeremy R.; et al. (April 2003), "Stellar Kinematic Groups. II. A Reexamination of the Membership, Activity, and Age of the Ursa Major Group", The Astronomical Journal 125 (4): 1980–2017, Bibcode:2003AJ....125.1980K, doi:10.1086/368241.
External links
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