Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Aries |
Right ascension | 02h 38m 48.99425s[1] |
Declination | +21° 57′ 41.0616″[1] |
Apparent magnitude (V) | 5.43[2] |
Characteristics | |
Spectral type | A7 V[3] |
U−B color index | +0.13[2] |
B−V color index | +0.16[2] |
Astrometry | |
Radial velocity (Rv) | +8.0±4.2[4] km/s |
Proper motion (μ) | RA: −7.47[1] mas/yr Dec.: −15.90[1] mas/yr |
Parallax (π) | 9.68 ± 0.76 mas[1] |
Distance | 340 ± 30 ly (103 ± 8 pc) |
Absolute magnitude (MV) | +0.40[5] |
Details | |
ν Ari A | |
Mass | 2.43±0.06[6] M☉ |
Radius | 1.8[7] R☉ |
Luminosity | 63.5[6] L☉ |
Surface gravity (log g) | 3.5±0.25[8] cgs |
Temperature | 8,000±500[8] K |
Rotational velocity (v sin i) | 133[6] km/s |
Age | 621+269 −268[8] Myr |
ν Ari B | |
Mass | 1.0±0.03[8] M☉ |
Temperature | 5,551±107[8] K |
Metallicity [Fe/H] | 0.0[8] dex |
Rotational velocity (v sin i) | 10[8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Nu Arietis, Latinized from ν Arietis, is the Bayer designation for a white-hued star in the northern constellation of Aries. It is faintly visible to the naked eye with an apparent visual magnitude of +5.43.[2] Based upon an annual parallax shift of 9.68 mas as seen from Earth,[1] it is located roughly 340 light years from the Sun. It is moving away from the Sun with a radial velocity of 8 km/s.[4]
This is an A-type main sequence star with a stellar classification of A7 V.[3] Nu Arietis has an estimated 2.4[6] times the mass of the Sun and about 1.8[7] times the Sun's radius. The star is radiating 63.5[6] times the Sun's luminosity from its photosphere at an effective temperature of around 8,000 K.[8] It is roughly 621[8] million years old and is spinning with a projected rotational velocity of 133 km/s.[6] A close companion was discovered in 2016 using the direct spectral detection method.[8]
vanLeeuwen2007
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