51 Aurigae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 38m 39.53431s[1] |
| Declination | +39° 23′ 27.0554″[1] |
| Apparent magnitude (V) | 5.696[2] |
| Characteristics | |
| Spectral type | K5III[2] |
| U−B color index | +1.56[3] |
| B−V color index | +1.34[3] |
| Astrometry | |
| Radial velocity (Rv) | 31.98 ± 0.15[4] km/s |
| Proper motion (μ) | RA: −26.77[1] mas/yr Dec.: −110.01[1] mas/yr |
| Parallax (π) | 6.68 ± 0.66[1] mas |
| Distance | 490 ± 50 ly (150 ± 10 pc) |
| Absolute magnitude (MV) | 0.76[5] |
| Details | |
| Mass | 1.58 ± 0.53[6] M☉ |
| Radius | 19[4] R☉ |
| Luminosity | 100[4] L☉ |
| Surface gravity (log g) | 1.84 ± 0.11[6] cgs |
| Temperature | 4277 ± 92[6] K |
| Metallicity [Fe/H] | 0.01 ± 0.05[6] dex |
| Age | 2.2[7] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
51 Aurigae is a star in the constellation Auriga. Its apparent magnitude is about 5.70.[2] Based on parallax, it is located some 490 light-years (150 parsecs) away from the Sun.[1]
At 2.2 billion years old,[7] 51 Aurigae has evolved off from the main sequence and is now a K-type giant star.[2] It is 1.58 times as massive as the Sun,[6] 19 times as wide, and 100 times as luminous.[4] It emits radiation with a surface temperature of about 4,277 K.[6]
References
- 1 2 3 4 5 6 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- 1 2 3 4 Kharchenko, N. V.; et al. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776.
- 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.
- 1 2 3 4 Massarotti, Alessandro; Latham, David W.; Stefanik, Robert P.; Fogel, Jeffrey (2008). "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity". The Astronomical Journal. 135: 209. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209.
- ↑ Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A.
- 1 2 3 4 5 6 Feuillet, Diane K.; Bovy, Jo; Holtzman, Jon; Girardi, Léo; MacDonald, Nick; Majewski, Steven R.; Nidever, David L. (2016). "Determining Ages of APOGEE Giants with Known Distances". The Astrophysical Journal. 817: 40. arXiv:1511.04088. Bibcode:2016ApJ...817...40F. doi:10.3847/0004-637X/817/1/40.
- 1 2 Martig, Marie; Fouesneau, Morgan; Rix, Hans-Walter; Ness, Melissa; Mészáros, Szabolcs; García-Hernández, D. A.; Pinsonneault, Marc; Serenelli, Aldo; Aguirre, Victor Silva; Zamora, Olga (2016). "Red giant masses and ages derived from carbon and nitrogen abundances". Monthly Notices of the Royal Astronomical Society. 456 (4): 3655. arXiv:1511.08203. Bibcode:2016MNRAS.456.3655M. doi:10.1093/mnras/stv2830.
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