52 Arietis
52 Arietis (abbreviated 52 Ari) is a triple star system in the northern constellation of Aries. 52 Arietis is the Flamsteed designation. The combined apparent magnitude is +5.46,[2] which is bright enough to be faintly visible to the naked eye. Based upon an annual parallax shift of 6.05 mas,[1] the system is roughly 540 light-years (170 parsecs) distant from the Earth. The inner pair of this system consist of two nearly identical B-type main sequence stars, each with about five times the mass of the Sun. The tertiary component is a smaller star with 88% of the Sun's mass, and is a common proper motion companion.[6]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aries |
Right ascension | 03h 05m 26.68819s[1] |
Declination | +25° 15′ 18.6257″[1] |
Apparent magnitude (V) | 5.46[2] |
Characteristics | |
Spectral type | B7 V + B7 V[3] |
U−B color index | -0.38[2] |
B−V color index | -0.03[2] |
Astrometry | |
Radial velocity (Rv) | 9[4] km/s |
Proper motion (μ) | RA: +1.44[1] mas/yr Dec.: -10.26[1] mas/yr |
Parallax (π) | 6.05 ± 1.06[1] mas |
Distance | approx. 540 ly (approx. 170 pc) |
Orbit | |
Primary | 52 Ari A |
Companion | 52 Ari B |
Period (P) | 227[5] yr |
Semi-major axis (a) | 0.47″ |
Eccentricity (e) | 0.73[5] |
Inclination (i) | 77.5° |
Longitude of the node (Ω) | 92.8° |
Periastron epoch (T) | 1938.5 |
Details | |
52 Ari A | |
Mass | 5.12[6] M☉ |
Radius | 3.3[7] R☉ |
Luminosity | 452[8] L☉ |
Temperature | 12,912[8] K |
Rotational velocity (v sin i) | 159[8] km/s |
52 Ari B | |
Mass | 5.12[6] M☉ |
Other designations | |
52 Ari A: HD 19134, HR 927. | |
52 Ari B: HD 19135, HR 928. | |
Database references | |
SIMBAD | 52 Ari |
52 Ari A | |
52 Ari B |
References
- van Leeuwen, F. (November 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.
- Eggen, Olin J. (1966), "Three-colour photometry of the components in wide double and multiple systems II", Royal Observatory bulletins. Series E (120): 333–403, Bibcode:1966RGOB..120..333E
- "52 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-16.
- Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W.
- Abt, Helmut A. (August 2005), "Observed Orbital Eccentricities", The Astrophysical Journal, 629 (1): 507–511, Bibcode:2005ApJ...629..507A, doi:10.1086/431207.
- Tokovinin, A. (September 2008), "Comparative statistics and origin of triple and quadruple stars", Monthly Notices of the Royal Astronomical Society, 389 (2): 925–938, arXiv:0806.3263, Bibcode:2008MNRAS.389..925T, doi:10.1111/j.1365-2966.2008.13613.x.
- Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
- Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691.
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