Omega Aurigae
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 04h 59m 15.40974s[1] |
| Declination | +37° 53′ 24.8816″[1] |
| Apparent magnitude (V) | 4.95[2] |
| Characteristics | |
| Spectral type | A1 V[3] |
| U−B color index | +0.01[2] |
| B−V color index | +0.05[2] |
| R−I color index | 0.03 |
| Astrometry | |
| Radial velocity (Rv) | +5[4] km/s |
| Proper motion (μ) | RA: +46.35[1] mas/yr Dec.: -97.80[1] mas/yr |
| Parallax (π) | 20.5 ± 0.94[1] mas |
| Distance | 159 ± 7 ly (49 ± 2 pc) |
| Details | |
| Radius | 2.1–2.7[5] R☉ |
| Surface gravity (log g) | 4.33[3] cgs |
| Temperature | 9,230[3] K |
| Metallicity [Fe/H] | –0.12[3] dex |
| Rotational velocity (v sin i) | 107[6] km/s |
| Other designations | |
Omega Aurigae (ω Aurigae) is the Bayer designation for a double star[8] in the northern constellation of Auriga. Its apparent magnitude is 4.95,[2] which is bright enough to be seen with the naked eye. The distance to this star, as determined using parallax measurements, is approximately 159 light-years (49 parsecs).[1] This is an A-type main sequence star with a stellar classification of A1 V.[3] It has a magnitude 8.18 companion at an angular separation of 4.99 arcseconds.[8]
References
- 1 2 3 4 5 6 van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752v1, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. Note: see VizieR catalogue I/311.
- 1 2 3 4 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99), Bibcode:1966CoLPL...4...99J.
- 1 2 3 4 5 Hill, G. M. (February 1995), "Compositional differences among the A-type stars. 2: Spectrum synthesis up to V sin i = 110 km/s", Astronomy and Astrophysics 294 (2): 536–546, Bibcode:1995A&A...294..536H.
- ↑ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953QB901.W495......
- ↑ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
- ↑ 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.
- ↑ "ome Aur -- Star in double system", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-08-24.
- 1 2 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.
External links
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