68 Aquilae

68 Aquilae (abbreviated 68 Aql) is a double star in the equatorial constellation of Aquila. 68 Aquilae is its Flamsteed designation. Its apparent magnitude is 6.12.

68 Aquilae
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension  20h 28m 24.90515s[1]
Declination –03° 21′ 28.0518″[1]
Apparent magnitude (V) 6.12[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type B9 V[2]
U−B color index –0.20[2]
B−V color index –0.06[2]
Astrometry
Radial velocity (Rv)–9[4] km/s
Proper motion (μ) RA: +27.02[1] mas/yr
Dec.: –20.53[1] mas/yr
Parallax (π)5.41 ± 0.42[1] mas
Distance600 ± 50 ly
(180 ± 10 pc)
Details
Mass3.16±0.12[3] M☉
Luminosity159.8+29.9
−25.2[3] L☉
Temperature10,641+50
−49[3] K
Rotational velocity (v sin i)138[5] km/s
Other designations
68 Aql, BD−03° 4906, HD 194939, HIP 100977, HR 7821, SAO 144468[6]
Database references
SIMBADdata

References
  1. 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.
  2. Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
  3. Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691.
  4. Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, Bibcode:1967IAUS...30...57E.
  5. Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224.
  6. "68 Aql -- Star in double system", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-26.
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