52 Arietis
(Redirected from HR 927)
| 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 mas[1] |
| 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 | |
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]
References
[edit]- ^ a b c d e f 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, S2CID 18759600.
- ^ a b c d Eggen, Olin J. (1966), "Three-colour photometry of the components in wide double and multiple systems II", Royal Observatory Bulletins. Series E, 120 (120): 333–403, Bibcode:1966RGOB..120..333E
- ^ a b "52 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-16.
- ^ Wilson, Ralph Elmer (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Washington: Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W.
- ^ a b Abt, Helmut A. (August 2005), "Observed Orbital Eccentricities", The Astrophysical Journal, 629 (1): 507–511, Bibcode:2005ApJ...629..507A, doi:10.1086/431207.
- ^ a b c 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, S2CID 16452670.
- ^ 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 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ a b c 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, S2CID 55586789.
External links
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