Astronomy:49 Aurigae
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | 06h 30m 02.97400s[2] |
| Declination | +46° 41′ 08.0041″[2] |
| Apparent magnitude (V) | 5.26[1] |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A0 Vnn[3] |
| B−V color index | −0.008±0.006[1] |
| Astrometry | |
| Radial velocity (Rv) | +17.0±2.8[1] km/s |
| Proper motion (μ) | RA: −7.582[2] mas/yr Dec.: +7.854[2] mas/yr |
| Parallax (π) | 4.7747 ± 0.0978[2] mas |
| Distance | 680 ± 10 ly (209 ± 4 pc) |
| Absolute magnitude (MV) | −0.01[1] |
| Details | |
| Mass | 2.50[4] M☉ |
| Radius | 4.2[4] R☉ |
| Luminosity | 143[4] L☉ |
| Surface gravity (log g) | 3.60[4] cgs |
| Temperature | 9,782[4] K |
| Rotational velocity (v sin i) | 149[5] km/s |
| Age | 281[6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
49 Aurigae is a single[8] star located 680[2] 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.[1] 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.[1] 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.[5] This star has around 4.2 times the radius of the Sun and is radiating 143 times the Sun's luminosity from its photosphere at an effective temperature of 9,782 K.[4]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 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.
- ↑ 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 4.2 4.3 4.4 4.5 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ 5.0 5.1 Dworetsky, Michael M. (November 1974), "Rotational Velocities of a0 Stars", Astrophysical Journal Supplement 28: 101, doi:10.1086/190312, Bibcode: 1974ApJS...28..101D.
- ↑ Gullikson, Kevin; Kraus, Adam; Dodson-Robinson, Sarah (2016). "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars". The Astronomical Journal 152 (2): 40. doi:10.3847/0004-6256/152/2/40. Bibcode: 2016AJ....152...40G.
- ↑ 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.
 |  |
