| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h48m 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] |
| Distance | 560 ± 10 ly (173 ± 4 pc) |
| Absolute magnitude (MV) | 0.48[2] |
| Details[6] | |
| Mass | 2.74±0.09 M☉ |
| Radius | 3.1[7] R☉ |
| Luminosity | 78.7+15.1 −12.7 L☉ |
| Surface gravity (log g) | 4.10[8] cgs |
| Temperature | 10,304+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 | |
| SIMBAD | data |
VZ Arietis is single,[10] white-hued star in the northern zodiac constellationofAries. 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 shiftof5.8 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]
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