22 Aurigae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | 05h 23m 22.87257s[2] |
| Declination | +28° 56′ 12.6811″[2] |
| Apparent magnitude (V) | 6.45[1] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | B9 Vs[4] |
| Apparent magnitude (G) | 6.44[2] |
| B−V color index | −0.040±0.008[1] |
| Astrometry | |
| Radial velocity (Rv) | +9.6±2.7[1] km/s |
| Proper motion (μ) | RA: +16.181±0.047[2] mas/yr Dec.: −32.063±0.034[2] mas/yr |
| Parallax (π) | 6.2516±0.0437 mas[2] |
| Distance | 522 ± 4 ly (160 ± 1 pc) |
| Absolute magnitude (MV) | 0.41[1] |
| Details | |
| Mass | 2.85±0.08[3] M☉ |
| Radius | 3.1[5] R☉ |
| Luminosity | 89.7+15.5 −10.1[3] L☉ |
| Temperature | 10,764+140 −49[3] K |
| Rotational velocity (v sin i) | 66[3] km/s |
| Other designations | |
| 22 Aur, BD+28°788, HD 35076, HIP 25192, HR 1768, SAO 77139, Gaia DR3 3445649302903509760[6] | |
| Database references | |
| SIMBAD | data |
22 Aurigae is a star located 522 light years away from the Sun in the northern constellation Auriga.[2] It is just bright enough to be barely visible to the naked eye under good viewing conditions, appearing as a blue-white hued star with an apparent visual magnitude of 6.45.[1] At the distance of this object, the brightness is diminished by an extinction of 0.57 due to interstellar dust.[7] The star is moving further from the Earth with a heliocentric radial velocity of +10 km/s,[1] and it is a member of the Taurion OB association, located between Orion and Taurus.[8]
This object is a B-type main-sequence star with a stellar classification of B9 Vs.[4] The 's' notation indicates the spectrum appears "sharp"-lined, due to its relatively moderate projected rotational velocity of 66 km/s.[3] It has 2.9[3] times the mass of the Sun and about 3.1[5] times the Sun's radius. The star is radiating 90[3] times the luminosity of the Sun from its photosphere at an effective temperature of 10,764 K.[3]
References
- ^ a b c d e f g 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. XHIP record for this object at VizieR.
- ^ a b c d e f g 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 e f g h i Zorec, J.; et al. (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 Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ "22 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-21.
- ^ Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035, S2CID 119108982.
- ^ Bouy, H.; Alves, J. (December 2015), "Cosmography of OB stars in the solar neighbourhood", Astronomy & Astrophysics, 584: 13, Bibcode:2015A&A...584A..26B, doi:10.1051/0004-6361/201527058, A26.