51 Arietis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aries |
| Right ascension | 03h 02m 26.02628s |
| Declination | +26° 36′ 33.2602″ |
| Apparent magnitude (V) | 6.623 ± 0.005 |
| Characteristics | |
| Spectral type | G8 V |
| B−V color index | 0.715 |
| Astrometry | |
| Radial velocity (Rv) | +9.5±0.1 km/s |
| Proper motion (μ) | RA: +233.122 mas/yr Dec.: –168.438 mas/yr |
| Parallax (π) | 47.1551±0.0603 mas |
| Distance | 69.17 ± 0.09 ly (21.21 ± 0.03 pc) |
| Absolute bolometric magnitude (Mbol) | 4.85±0.07 |
| Details | |
| Mass | 1.04 M☉ |
| Radius | 0.99 R☉ |
| Luminosity | 0.92 L☉ |
| Surface gravity (log g) | 4.46 cgs |
| Temperature | 5,666 K |
| Metallicity [Fe/H] | 0.15 dex |
| Rotational velocity (v sin i) | 4.08 km/s |
| Age | 1.40 Gyr |
| Other designations | |
| 51 Ari, BD+26°503, GJ 120.2, HD 18803, HIP 14150, SAO 75696 | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
51 Arietis is a star in the northern constellation of Aries. 51 Arietis is the Flamsteed designation. It is a dim, yellow-hued star – a challenge to view with the naked eye, having an apparent visual magnitude of 6.6. Based upon parallax measurements, the star is located at an estimated distance of 67.3 light-years (20.6 parsecs) from the Sun. It is receding from the Earth with a heliocentric radial velocity of +9.5 km/s, and is a member of the IC 2391 moving group.
This is an ordinary G-type main sequence star with a stellar classification of G8 V. Similar to the Sun, it has 1.04 times the mass and 0.99 times the Sun's radius. It is 1.4 billion years old with a leisurely rotation rate, showing a projected rotational velocity of 4 km/s. The atmospheric metallicity is higher than solar. The star radiates 92% of the Sun's luminosity from its photosphere at an effective temperature of 5,666 K. This heat gives it the golden-hued glow of a G-type star.