Omega1 Aquilae
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aquila[1] |
| Right ascension | 19h 17m 48.999s[2] |
| Declination | +11° 35′ 43.53″[2] |
| Apparent magnitude (V) | 5.284[3] |
| Characteristics | |
| Evolutionary stage | subgiant[4][2] |
| Spectral type | F0 IV[5] |
| U−B color index | +0.204[3] |
| B−V color index | +0.238[3] |
| Astrometry | |
| Radial velocity (Rv) | −14.3[6] km/s |
| Proper motion (μ) | RA: +1.070 mas/yr[2] Dec.: +13.640 mas/yr[2] |
| Parallax (π) | 8.266±0.0721 mas[2] |
| Distance | 395 ± 3 ly (121 ± 1 pc) |
| Absolute magnitude (MV) | −0.24[1] |
| Details | |
| Mass | 2.85±0.06[4] M☉ |
| Radius | 5.38±0.03[2] R☉ |
| Luminosity | 92.2±1.6[2] L☉ |
| Surface gravity (log g) | 3.26[2] cgs |
| Temperature | 7,648+15 −14[2] K |
| Rotational velocity (v sin i) | 89[4] km/s |
| Age | 456+129 −49[2] Myr |
| Other designations | |
| ω1 Aql, 25 Aquilae, BD+11°3790, FK5 725, GC 26609, HD 180868, HIP 94834, HR 7315, SAO 104691, PPM 136078[7] | |
| Database references | |
| SIMBAD | data |
Omega1 Aquilae is a single[8] star in the equatorial constellation of Aquila. Its name is a Bayer designation that is Latinized from ω1 Aquilae, and abbreviated Omega1 Aql or ω1 Aql. With an apparent visual magnitude of 5.2[3] it is a faint, yellow-white hued star that can be seen with the naked eye in dark skies. From the annual parallax shift of 8.27 mas,[2] the distance to this star can be estimated as 395 light-years (121 parsecs), give or take a 3 light year margin of error. It is drifting closer to the Sun with a radial velocity of −14 km/s.[6]
The spectrum of this star fits a stellar classification of F0 IV.[5] Typically, a luminosity class of IV means that the star is in the subgiant stage. It is rotating rapidly with a projected rotational velocity of 89 km/s.[4] The star has 2.85 times the mass of the Sun[4] and five times the Sun's radius. It is radiating 85 times the luminosity of the Sun from its photosphere at an effective temperature of 7,766 K.[2]
References
[edit]- ^ a b Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ a b c d e f g h i j k l Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d Gutierrez-Moreno, Adelina; et al. (1966), "A System of photometric standards", Publications of the Department of Astronomy University of Chile, 1, Publicaciones Universidad de Chile, Department de Astronomy: 1–17, Bibcode:1966PDAUC...1....1G.
- ^ a b c d e Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- ^ a b 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 Wielen, R.; et al. (1999), "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions", Veroeffentlichungen des Astronomischen Rechen-Instituts Heidelberg, 35 (35), Astronomisches Rechen-Institut Heidelberg: 1, Bibcode:1999VeARI..35....1W.
- ^ "ome01 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-28.
- ^ 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.
