VZ Arietis

VZ Arietis
Observation data
Epoch J2000      Equinox J2000
Constellation Aries
Right ascension 02h 48m 45.90719s[1]
Declination +25° 11′ 16.95410″[1]
Apparent magnitude (V) 5.89[2] (5.82 - 5.89)[3]
Characteristics
Spectral type A0 V[4]
B−V color index −0.033±0.005[2]
Variable type α2 CVn[3]
Astrometry
Radial velocity (Rv)+13.8±2.9[5] km/s
Proper motion (μ) RA: +56.600[1] mas/yr
Dec.: −0.264[1] mas/yr
Parallax (π)5.7743 ± 0.1298 mas[1]
Distance560 ± 10 ly
(173 ± 4 pc)
Absolute magnitude (MV)0.48[2]
Details[6]
Mass2.74±0.09 M☉
Radius3.1[7] R☉
Luminosity78.7+15.1
−12.7 L☉
Surface gravity (log g)4.10[8] cgs
Temperature10,304+72
−71 K
Metallicity [Fe/H]+0.1[8] dex
Rotational velocity (v sin i)54 km/s
Other designations
16 Trianguli, VZ Arietis, BD+24°396, FK5 5868, HD 17471, HIP 13121, HR 830, SAO 75588[9]
Database references
SIMBADdata

VZ Arietis is single,[10] white-hued star in the northern zodiac constellation of Aries. Varying between magnitudes 5.82 and 5.89,[3] the star can be seen with the naked eye in dark, unpolluted areas. Based upon an annual parallax shift of 5.8 mas,[1] it is located 560 light years from the Sun. It is moving further away with a heliocentric radial velocity of +14 km/s.[5] The star was formerly known as 16 Trianguli, but as the star is no longer in the constellation Triangulum, this designation has fallen out of use.[11]

This is a chemically peculiar star[6] of type CP2 (Ap star),[12] showing an anomalous abundance of silicon in its spectrum.[13] It has a stellar classification of A0 V,[4] which indicates this is an A-type main-sequence star that currently fusing hydrogen into helium in its core. This is an Alpha2 Canum Venaticorum variable[12] with 2.7[6] times the mass of the Sun and about 3.1[7] times the Sun's radius. It is radiating 79 times the Sun's luminosity from its photosphere at an effective temperature of 10,304 K.[6]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference AAVSO was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference CADARS was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference gebran2016 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).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Wagman1987 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Wraight2012 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Zverko1984 was invoked but never defined (see the help page).