| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 03m 39.34547s[1] |
| Declination | +25° 56′ 07.7129″[1] |
| Apparent magnitude (V) | 5.63[2] |
| Characteristics | |
| Spectral type | F8 IV + F9 V[2] |
| Astrometry | |
| Radial velocity (Rv) | +12.9[3] km/s |
| Proper motion (μ) | RA: +128.01[1] mas/yr Dec.: +11.19[1] mas/yr |
| Parallax (π) | 20.53 ± 0.67 mas[1] |
| Distance | 159 ± 5 ly (49 ± 2 pc) |
| Absolute magnitude (MV) | 2.21[3] |
| Orbit[4] | |
| Period (P) | 325 yr |
| Semi-major axis (a) | 1.39″ |
| Eccentricity (e) | 0.59 |
| Inclination (i) | 51° |
| Longitude of the node (Ω) | 20.5° |
| Periastron epoch (T) | B1931.6 |
| Argument of periastron (ω) (secondary) | 165° |
| Details | |
| Metallicity [Fe/H] | –0.10[3] dex |
| Age | 1.9[3] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
10 Arietis is a binary star[6] system in the northern constellation of Aries. 10 Arietis is the Flamsteed designation. It is visible to the naked eye as a dim, yellow-white hued star with a combined apparent visual magnitude of 5.63.[2] Based upon parallax measurements, it is located around 159 light years away from the Sun. The system is receding from the Earth with a heliocentric radial velocity of +12.9 km/s.[3]
The pair orbit each other with a period of approximately 325 years and an eccentricity of 0.59. The semimajor axis of the orbit has an angular size of 1.39″.[4] The magnitude 5.92[6] primary, designated component A, is an aging F-type subgiant star with a stellar classification of F8 IV.[2] The secondary star, component B, is a magnitude 7.95[6] F-type main-sequence star with a stellar classification of F9 V.[2] There is a magnitude 13.5 visual companion, designated component C, at an angular separation of 95.30″ along a position angle of 150°, as of 2001.[7]
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