Astronomy:49 Aurigae
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 30m 02.97400s[1] |
| Declination | +46° 41′ 08.0041″[1] |
| Apparent magnitude (V) | 5.26[2] |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A0 Vnn[3] |
| B−V color index | −0.008±0.006[2] |
| Astrometry | |
| Radial velocity (Rv) | +17.0±2.8[2] km/s |
| Proper motion (μ) | RA: −7.582[1] mas/yr Dec.: +7.854[1] mas/yr |
| Parallax (π) | 4.7747 ± 0.0978[1] mas |
| Distance | 680 ± 10 ly (209 ± 4 pc) |
| Absolute magnitude (MV) | −0.01[2] |
| Details | |
| Radius | 2.3[4] R☉ |
| Luminosity | 3.28[2] L☉ |
| Temperature | 8,794[5] K |
| Rotational velocity (v sin i) | 149[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
49 Aurigae is a single[8] star located 680[1] light years away from the Sun in the northern constellation of Auriga.[7] It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.26.[2] The star is moving away from the Earth with a heliocentric radial velocity of +17 km/s, having come to within 149 ly some 5.5 million years ago.[2] It is positioned near the ecliptic and thus is subject to lunar occultations.[9][10]
This object is an A-type main-sequence star with a stellar classification of A0 Vnn,[3] where the 'n' notation indicates "nebulous" lines due to rapid rotation. It is spinning with a projected rotational velocity of 149 km/s.[6] This star has around 2.3[4] times the radius of the Sun and is radiating over three[2] times the Sun's luminosity from its photosphere at an effective temperature of 8,794 K.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C.
- ↑ 4.0 4.1 Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (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.
- ↑ 5.0 5.1 McDonald, I. et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–357, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
- ↑ 6.0 6.1 Dworetsky, Michael M. (November 1974), "Rotational Velocities of a0 Stars", Astrophysical Journal Supplement 28: 101, doi:10.1086/190312, Bibcode: 1974ApJS...28..101D.
- ↑ 7.0 7.1 "49 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=49+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.
- ↑ Meyer, C. et al. (1995), "Observations of lunar occultations at Observatoire de la Cote d'Azur", Astronomy and Astrophysics Supplement 110: 107, Bibcode: 1995A&AS..110..107M.
- ↑ Schmidtke, P. C.; Africano, J. L. (2011), "KPNO Lunar Occultation Summary. III", The Astronomical Journal 141 (1): 10, doi:10.1088/0004-6256/141/1/10, Bibcode: 2011AJ....141...10S.
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