Summary
11 Aquilae (abbreviated 11 Aql) is a single[8] 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 20.9 mas,[1] the distance to this star is approximately 156 light-years (48 parsecs). The brightness of this star is diminished by 0.33 in magnitude because of extinction from interstellar gas and dust.[9]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 18h 59m 05.73920s[1] |
| Declination | +13° 37′ 20.0725″[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: +14.475[1] mas/yr Dec.: –124.382[1] mas/yr |
| Parallax (π) | 20.9187 ± 0.1107 mas[1] |
| Distance | 155.9 ± 0.8 ly (47.8 ± 0.3 pc) |
| Absolute magnitude (MV) | 2.96[5] |
| Details | |
| Radius | 3.49+0.10 −0.11[1] R☉ |
| Luminosity | 15.4±0.1[1] L☉ |
| Surface gravity (log g) | 3.94[5] cgs |
| Temperature | 6,118+94 −89[1] K |
| Metallicity [Fe/H] | –0.07[5] dex |
| Rotational velocity (v sin i) | 24.6±0.7[6] km/s |
| Age | 1.5[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an F-type main sequence star with a stellar classification of F8 V.[3] It is radiating about 15.4 times the luminosity of the Sun from its outer atmosphere at an effective temperature of 6,118 K,[1] 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 edit
- ^ a b c d e f g h i j 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 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, S2CID 118577511.
- ^ a b Eggen, O. J. (1962), "Space-velocity vectors for 3483 stars with proper motion and radial velocity", Royal Observatory Bulletin, 51: 79, Bibcode:1962RGOB...51...79E.
- ^ a b 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.
- ^ a b c 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.
- ^ Reiners, Ansgar; Schmitt, Jürgen H. M. M. (February 2003), "Rotation and differential rotation in field F- and G-type stars", Astronomy and Astrophysics, 398 (2): 647–661, Bibcode:2003A&A...398..647R, doi:10.1051/0004-6361:20021642.
- ^ "* 11 Aql", SIMBAD, 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, S2CID 14878976.
- ^ 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, S2CID 10713221.
- ^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on February 22, 2012, 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 edit
- Image 11 Aquilae
- HR 7172
- CCDM 18591+1337