| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 02h 51m 02.32186s[1] |
| Declination | −21° 00′ 14.4654″[1] |
| Apparent magnitude (V) | 4.78[2] |
| Characteristics | |
| Spectral type | K0 III[3] |
| U−B color index | +0.63[2] |
| B−V color index | +0.92[2] |
| Astrometry | |
| Radial velocity (Rv) | −5.9[4] km/s |
| Proper motion (μ) | RA: −38.52[1] mas/yr Dec.: −16.05[1] mas/yr |
| Parallax (π) | 17.45 ± 0.20 mas[1] |
| Distance | 187 ± 2 ly (57.3 ± 0.7 pc) |
| Absolute magnitude (MV) | 1.008[5] |
| Details | |
| Mass | 2.39±0.03[6] M☉ |
| Radius | 8.85±0.08[6] R☉ |
| Luminosity | 44.36±0.8[6] L☉ |
| Surface gravity (log g) | 2.95±0.03[4] cgs |
| Temperature | 5,049±20[4] K |
| Metallicity [Fe/H] | 0.08±0.06[4] dex |
| Rotational velocity (v sin i) | 1.11[4] km/s |
| Age | 720±50[6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Tau2 Eridani (τ2 Eridani, abbreviated Tau2 Eri, τ2 Eri), formally named Angetenar /æŋˈɡɛtənɑːr/,[8][9] is a star in the constellation of Eridanus. It is visible to the naked eye with an apparent visual magnitude of 4.78.[2] The distance to this star, as determined via the parallax method, is around 187 light-years.
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