Astronomy:39 Aurigae
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 05m 03.38423s[1] |
| Declination | +42° 58′ 53.8846″[1] |
| Apparent magnitude (V) | 5.90[2] |
| Characteristics | |
| Spectral type | F1 V[2] |
| B−V color index | 0.358±0.005[2] |
| Astrometry | |
| Radial velocity (Rv) | +34.1±2.9[3] km/s |
| Proper motion (μ) | RA: −45.17[1] mas/yr Dec.: −144.26[1] mas/yr |
| Parallax (π) | 20.11 ± 0.40[1] mas |
| Distance | 162 ± 3 ly (49.7 ± 1.0 pc) |
| Absolute magnitude (MV) | 2.45[4] |
| Details | |
| Mass | 1.45[5] M☉ |
| Luminosity | 9.36[2] L☉ |
| Surface gravity (log g) | 4.14±0.14[5] cgs |
| Temperature | 7,161±243[5] K |
| Metallicity [Fe/H] | −0.03±0.15[2] dex |
| Rotational velocity (v sin i) | 87.8±4.4[4] km/s |
| Age | 603[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
39 Aurigae is a single[7] star in the constellation of Auriga. The designation is from the star catalogue of English astronomer John Flamsteed, first published in 1712. The star is just barely visible to the naked eye, having an apparent visual magnitude of 5.90.[2] Based upon an annual parallax shift of 20.11[1] mas as seen from Earth, it is located 112 light years away. 5 Andromedae is moving further from the Sun with a radial velocity of +34 km/s.[3] It has a relatively high proper motion, advancing across the celestial sphere at the rate of 0.151 arc seconds per year.[8]
This is an F-type main-sequence star with a stellar classification of F1 V.[2] It is an estimated 603[5] million years old with a relatively high rate of spin, showing a projected rotational velocity of around 88 km/s.[4] The star has 1.45[5] times the mass of the Sun and it is radiating 9.36[2] times the Sun's luminosity from its photosphere at an effective temperature of around 7,161 K.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 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 de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: 14, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
- ↑ 4.0 4.1 4.2 Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics 542: A116, doi:10.1051/0004-6361/201118724, Bibcode: 2012A&A...542A.116A.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal 804 (2): 146, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ "39 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=39+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.
- ↑ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal 129 (3): 1483–1522, doi:10.1086/427854, Bibcode: 2005AJ....129.1483L.
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