Location of TZ Arietis in the constellation Aries | |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aries |
Right ascension | 02h 00m 12.95632s[1] |
Declination | +13° 03′ 07.0006″[1] |
Apparent magnitude (V) | 12.298[2] |
Characteristics | |
Spectral type | M4.5 V[3] |
U−B color index | +1.37[4] |
B−V color index | +1.80[4] |
R−I color index | 1.39[3] |
Variable type | Flare star |
Astrometry | |
Radial velocity (Rv) | −28.29±0.25[1] km/s |
Proper motion (μ) | RA: 1096.458 mas/yr[1] Dec.: -1771.526 mas/yr[1] |
Parallax (π) | 223.7321 ± 0.0699 mas[1] |
Distance | 14.578 ± 0.005 ly (4.470 ± 0.001 pc) |
Absolute magnitude (MV) | 14.03[5] |
Details | |
Mass | 0.14[6] M☉ |
Radius | 0.161[7] R☉ |
Luminosity | 0.00135[8] L☉ |
Surface gravity (log g) | 5.05[6] cgs |
Temperature | 3,158[7] K |
Metallicity [Fe/H] | −0.14[7] dex |
Rotational velocity (v sin i) | 3.8[8] km/s |
Age | 4.8[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
TZ Arietis (also known as Gliese 83.1, GJ 9066, or L 1159-16) is a red dwarf in the northern constellation of Aries. With a normal apparent visual magnitude of 12.3, it is too faint to be seen by the naked eye, although it lies relatively close to the Sun at a distance of 14.6 light-years (4.47 parsecs). It is a flare star, which means it can suddenly increase in brightness for short periods of time.
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