52 Arietis
Triple star system in the constellation Aries
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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 ICRS | |
|---|---|
| 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 |
| Name | 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 Arietis, ADS 2336, BD+24°431, HIP 14376.[3] | |
| 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 | |
