53 Aurigae
53 Aurigae is a binary star system in the northern constellation of Auriga. It is visible to the naked eye as a dim star with a combined apparent visual magnitude of 5.74.[2] Parallax estimates put it at a distance of 383 light-years (117 parsecs) away.[1] The system is receding from the Earth with a heliocentric radial velocity of 13 km/s.[5]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 38m 23.01009s[1] |
| Declination | +28° 59′ 03.6220″[1] |
| Apparent magnitude (V) | 5.744[2] |
| Characteristics | |
| Spectral type | B9 Mn + F0m[3] |
| U−B color index | −0.07[4] |
| B−V color index | −0.02[4] |
| Astrometry | |
| Radial velocity (Rv) | 13.1±5.0[5] km/s |
| Proper motion (μ) | RA: −16.390[1] mas/yr Dec.: −14.305[1] mas/yr |
| Parallax (π) | 8.5139 ± 0.1372[1] mas |
| Distance | 383 ± 6 ly (117 ± 2 pc) |
| Absolute magnitude (MV) | +0.48[6] |
| Orbit[7] | |
| Period (P) | 38.90 yr |
| Semi-major axis (a) | 0.159″ |
| Eccentricity (e) | 0.557 |
| Inclination (i) | 119.5° |
| Longitude of the node (Ω) | 113.5° |
| Periastron epoch (T) | B 1976.73 |
| Argument of periastron (ω) (secondary) | 343.3° |
| Details | |
| 53 Aur A | |
| Mass | 2.49±0.13[8] M☉ |
| Surface gravity (log g) | 4.0[3] cgs |
| Temperature | 10750[3] K |
| Rotational velocity (v sin i) | 25[3] km/s |
| 53 Aur B | |
| Surface gravity (log g) | 4.0[3] cgs |
| Temperature | 7,250[3] K |
| Rotational velocity (v sin i) | 0[3] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
The two components of 53 Aurigae orbit each other every 39 years with an eccentricity of 0.557.[7] The primary component, 53 Aurigae A, is chemically peculiar since it contains higher-than-normal amounts of manganese,[3] but also europium, chromium, and mercury.[8] It is a B-type main-sequence star,[8] while the secondary component, 53 Aurigae B, is an early F-type main-sequence star.[8] The total mass of the system is estimated to be 4.8 M☉.[8]
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- Zverko, J.; Žižňovský, J.; Mikulášek, Z.; Iliev, I. Kh. (2008). "53 Aurigae revisited: a B9Mn + F0m composite spectrum". Contributions of the Astronomical Observatory Skalnaté Pleso. 38 (2): 467–468. Bibcode:2008CoSka..38..467Z.
- Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
- 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.
- Murphy, Simon J.; Corbally, Christopher J.; Gray, Richard O.; Cheng, Kwang-Ping; Neff, James E.; Koen, Chris; Kuehn, Charles A.; Newsome, Ian; Riggs, Quinlin (2015). "An Evaluation of the Membership Probability of 212 λ Boo Stars. I. A Catalogue". Publications of the Astronomical Society of Australia. 32: e036. arXiv:1508.03633. Bibcode:2015PASA...32...36M. doi:10.1017/pasa.2015.34.
- "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Retrieved 28 May 2017.
- Wraight, K. T.; Fossati, L.; Netopil, M.; Paunzen, E.; Rode-Paunzen, M.; Bewsher, D.; Norton, A. J.; White, Glenn J. (2012). "A photometric study of chemically peculiar stars with the STEREO satellites - I. Magnetic chemically peculiar stars★". Monthly Notices of the Royal Astronomical Society. 420: 757. arXiv:1110.6283. Bibcode:2012MNRAS.420..757W. doi:10.1111/j.1365-2966.2011.20090.x.
