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.
| 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 |
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.
External links
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