TZ Arietis
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.
TZ Arietis Location of TZ Arietis in the constellation Aries | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 00m 12.95632s |
| Declination | +13° 03′ 07.0006″ |
| Apparent magnitude (V) | 12.298 |
| Characteristics | |
| Spectral type | M4.5 V |
| U−B color index | +1.37 |
| B−V color index | +1.80 |
| R−I color index | 1.39 |
| Variable type | Flare star |
| Astrometry | |
| Radial velocity (Rv) | −28.29±0.25 km/s |
| Proper motion (μ) | RA: 1096.458 mas/yr Dec.: -1771.526 mas/yr |
| Parallax (π) | 223.7321 ± 0.0699 mas |
| Distance | 14.578 ± 0.005 ly (4.470 ± 0.001 pc) |
| Absolute magnitude (MV) | 14.03 |
| Details | |
| Mass | 0.14 M☉ |
| Radius | 0.161 R☉ |
| Luminosity | 0.00135 L☉ |
| Surface gravity (log g) | 5.05 cgs |
| Temperature | 3,158 K |
| Metallicity [Fe/H] | −0.14 dex |
| Rotational velocity (v sin i) | 3.8 km/s |
| Age | 4.8 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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