68 Aquilae

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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

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.

References[edit]

  1. ^ a b c d e 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. ^ a b c d 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. ^ a b c d 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.

External links[edit]