VZ Arietis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 5.89[1] (5.82 - 5.89)[3] |
| Characteristics | |
| Spectral type | A0 V[4] |
| B−V Template:Engvar | Script error: No such module "val".[1] |
| Variable type | α2 CVn[3] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[5] km/s |
| Proper motion (μ) | RA: +56.600[2] mas/yr Dec.: −0.264[2] mas/yr |
| Parallax (π) | 5.7743±0.1298 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 0.48[1] |
| Details[6] | |
| Mass | Script error: No such module "val". Template:Solar mass |
| Radius | 3.1[7] Template:Solar radius |
| Luminosity | Script error: No such module "val". Template:Solar luminosity |
| Surface gravity (log g) | 4.10[8] cgs |
| Temperature | Script error: No such module "val". K |
| Metallicity [Fe/H] | +0.1[8] dex |
| Rotational velocity (v sin i) | 54 km/s |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[9] | |
| Database references | |
| SIMBAD | data |
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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 Script error: No such module "val".,[2] 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]
In 1984, the Czechoslovakian astronomer Juraj Zverko announced that the star, then called HR 830, is a variable star.[12] It was given its variable star designation, VZ Arietis, in 1987.[13]
This is a chemically peculiar star[6] of type CP2 (Ap star),[14] showing an anomalous abundance of silicon in its spectrum.[12] 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[14] 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]
References
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