Nu Arietis

Nu Arietis
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]
Distance340 ± 30 ly
(103 ± 8 pc)
Absolute magnitude (MV)+0.40[5]
Details
ν Ari A
Mass2.43±0.06[6] M☉
Radius1.8[7] R☉
Luminosity63.5[6] L☉
Surface gravity (log g)3.5±0.25[8] cgs
Temperature8,000±500[8] K
Rotational velocity (v sin i)133[6] km/s
Age621+269
−268[8] Myr
ν Ari B
Mass1.0±0.03[8] M☉
Temperature5,551±107[8] K
Metallicity [Fe/H]0.0[8] dex
Rotational velocity (v sin i)10[8] km/s
Other designations
ν Ari, 32 Arietis, BD+21° 362, FK5 89, HD 16432, HIP 12332, HR 773, SAO 75495[9]
Database references
SIMBADdata

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]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Oja1983 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference Huang2010 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Fracassini2001 was invoked but never defined (see the help page).
  8. ^ a b c d e f g h i j Cite error: The named reference Kraus2016 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).