Star · A4V
τ³ Eri
τ³ Eri is a main-sequence star of spectral type A4V in the constellation Eridanus, 88.3 light-years from the Sun.
| Other names | Gl 121 · HIP 14146 |
|---|---|
| Constellation | Eridanus |
| Distance | 88.3 light-years (27.1 pc) |
| Apparent magnitude | magnitude 4.08 |
| Absolute magnitude | magnitude 1.92 |
| Spectral type | A4V |
| Surface temperature | 8,460 K |
| Luminosity | 16.2 L☉ |
| Radius | 1.87 R☉ |
| Mass | 2.01 M☉ (estimated) |
| Right ascension (J2000) | 3h 02m 23.5s |
| Declination (J2000) | −23° 37′ 28″ |
| Space velocity (relative to the Sun) | 22.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.08). Visible from the whole Southern Hemisphere and north to latitude 66° N. South of latitude 66° S it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1938. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.6 million years.
The Sun seen from there
From a planet around τ³ Eri, the Sun would look like a star of magnitude 6.99, in the direction where our sky has the constellation Boötes. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISEA J030119.39-231921.1 0.63 light-years
- HIP 14589 5.58 light-years
- HIP 14593 5.62 light-years
- HIP 14623 8.45 light-years
- Gl 120.1C 9.08 light-years
- 2MASSW J0309088-194938 9.10 light-years
- 2MASS J03264225-2102057 9.61 light-years
- HIP 13610 10.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.