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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]

11 Aquilae
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]
Distance155.9 ± 0.8 ly
(47.8 ± 0.3 pc)
Absolute magnitude (MV)2.96[5]
Details
Radius3.49+0.10
−0.11[1] R☉
Luminosity15.4±0.1[1] L☉
Surface gravity (log g)3.94[5] cgs
Temperature6,118+94
−89[1] K
Metallicity [Fe/H]–0.07[5] dex
Rotational velocity (v sin i)24.6±0.7[6] km/s
Age1.5[2] Gyr
Other designations
BD+13°3841, HD 176303, HIP 93203, HR 7172, SAO 104308[7]
Database references
SIMBADdata

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


  1. 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.
  2. 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.
  3. 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.
  4. 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.
  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.
  6. 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.
  7. "* 11 Aql", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2012-07-26.
  8. 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.
  9. 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.
  10. "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.
  11. 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.




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