Astronomy:19 Aurigae
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Short description: Star in the constellation Auriga
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 20m 00.92110s[2] |
| Declination | +33° 57′ 28.9949″[2] |
| Apparent magnitude (V) | 5.05[3] |
| Characteristics | |
| Evolutionary stage | bright giant |
| Spectral type | A5 II+[4] |
| B−V color index | 0.287±0.004[3] |
| Astrometry | |
| Radial velocity (Rv) | −4.3±0.9[3] km/s |
| Proper motion (μ) | RA: −0.264[2] mas/yr Dec.: −3.415[2] mas/yr |
| Parallax (π) | 0.8596 ± 0.0950[2] mas |
| Distance | approx. 3,800 ly (approx. 1,200 pc) |
| Details | |
| Mass | 7.8±0.5[5] M☉ |
| Radius | 15[6] R☉ |
| Luminosity (bolometric) | 7,057[7] L☉ |
| Surface gravity (log g) | 2.10±0.25[8] cgs |
| Temperature | 8,300±100[8] K |
| Metallicity [Fe/H] | −0.19[3] dex |
| Rotational velocity (v sin i) | 8.0[9] km/s |
| Age | 36.0±2.9[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
19 Aurigae is a single[11] star located approximately 3,800 light years away from the Sun in the northern constellation Auriga. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 5.05.[3] The star is moving closer to the Earth with a heliocentric radial velocity of 4.3 km/s.[3]
This is an evolved A-type bright giant star with a stellar classification of A5 II+.[4] It is a variable star of unknown type that ranges in magnitude from 5.03 down to 5.09.[1] This star is an estimated 36[5] million years old with a projected rotational velocity of 8 km/s.[9] It has 8[5] times the mass of the Sun and about 15[6] times the Sun's radius. 19 Aurigae is radiating 7,057[7] times the total luminosity of the Sun from its photosphere at an effective temperature of 8,300 K.[8]
References
- ↑ 1.0 1.1 Chistyakov, Yu. N.; Sokolov, N. A. (November 1999), "On the Variability of 19 Aurigae as Observed by the Hipparcos Satellite", Information Bulletin on Variable Stars 4808: 1, Bibcode: 1999IBVS.4808....1C.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 4.0 4.1 Gray, R. O. et al. (2001), "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars", The Astronomical Journal 121 (4): 2148, doi:10.1086/319956, Bibcode: 2001AJ....121.2148G.
- ↑ 5.0 5.1 5.2 5.3 Tetzlaff, N. et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society 410 (1): 190–200, doi:10.1111/j.1365-2966.2010.17434.x, Bibcode: 2011MNRAS.410..190T.
- ↑ 6.0 6.1 Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367: 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ 7.0 7.1 Hohle, M. M. et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten 331 (4): 349, doi:10.1002/asna.200911355, Bibcode: 2010AN....331..349H.
- ↑ 8.0 8.1 8.2 Lyubimkov, Leonid S. et al. (February 2010), "Accurate fundamental parameters for A-, F- and G-type Supergiants in the solar neighbourhood", Monthly Notices of the Royal Astronomical Society 402 (2): 1369–1379, doi:10.1111/j.1365-2966.2009.15979.x, Bibcode: 2010MNRAS.402.1369L.
- ↑ 9.0 9.1 Lyubimkov, Leonid S. et al. (2015), "Carbon abundance and the N/C ratio in atmospheres of A-, F- and G-type supergiants and bright giants", Monthly Notices of the Royal Astronomical Society 446 (4): 3447, doi:10.1093/mnras/stu2299, Bibcode: 2015MNRAS.446.3447L
- ↑ "19 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=19+Aur.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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