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39 Aurigae
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 05m 03.38470s[1] |
| Declination | +42° 58′ 53.8886″[1] |
| Apparent magnitude (V) | 5.90[2] |
| Characteristics | |
| Evolutionary stage | main sequence[1] |
| 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: −44.854[1] mas/yr Dec.: −146.396[1] mas/yr |
| Parallax (π) | 20.0918±0.0875 mas[1] |
| Distance | 162.3 ± 0.7 ly (49.8 ± 0.2 pc) |
| Absolute magnitude (MV) | 2.45[4] |
| Details | |
| Mass | 1.51[5] M☉ |
| Radius | 2.02[5] R☉ |
| Luminosity | 8.4[5] L☉ |
| Surface gravity (log g) | 4.14±0.14[6] cgs |
| Temperature | 7,161±243[6] K |
| Metallicity [Fe/H] | −0.03±0.15[2] dex |
| Rotational velocity (v sin i) | 87.8±4.4[4] km/s |
| Age | 603[6] Myr |
| Other designations | |
| 39 Aur, BD+42°1477, HD 41074, HIP 28823, HR 2132, SAO 40840[7] | |
| Database references | |
| SIMBAD | data |
39 Aurigae is a single[8] 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. Based upon an annual parallax shift of 20.10 mas as seen from Earth, it is located 162 light years away. 39 Aurigae is moving further from the Sun with a radial velocity of +34 km/s. It has a relatively high proper motion, advancing across the celestial sphere at the rate of 0.151 arc seconds per year.[9]
This is an F-type main-sequence star with a stellar classification of F1 V.[2] It is an estimated 603 million years old[6] with a relatively high rate of spin, showing a projected rotational velocity of around 88 km/s.[4] The star has 1.5 times the mass of the Sun and it is radiating 8.4 times the Sun's luminosity from its photosphere[5] at an effective temperature of around 7,161 K.[6]
References
[edit]- ^ a b c d e f 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 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, S2CID 119257644.
- ^ 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, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ a b c 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, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, S2CID 53666672.
- ^ a b c d Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467.
- ^ a b c d e 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, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
- ^ "39 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-02-07.
- ^ 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ 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, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854, S2CID 2603568.
