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 mas[1] |
Distance | 600 ± 50 ly (180 ± 10 pc) |
Details | |
Mass | 3.16±0.12[3] M☉ |
Luminosity | 159.8+29.9 −25.2[3] L☉ |
Temperature | 10,641+50 −49[3] K |
Rotational velocity (v sin i) | 138[5] km/s |
Other designations | |
Database references | |
SIMBAD | data |
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]- ^ 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, S2CID 18759600.
- ^ 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.
- ^ 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, S2CID 55586789.
- ^ 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, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode:1967IAUS...30...57E.
- ^ 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, S2CID 18475298.
- ^ "68 Aql -- Star in double system", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-26.