Star · K0III
ι Eri
ι Eri is a giant star of spectral type K0III in the constellation Eridanus, 146.4 light-years from the Sun.
| Other names | HIP 12486 |
|---|---|
| Constellation | Eridanus |
| Distance | 146.4 light-years (44.9 pc) |
| Apparent magnitude | magnitude 4.11 |
| Absolute magnitude | magnitude 0.85 |
| Spectral type | K0III |
| Surface temperature | 4,730 K |
| Luminosity | 61.7 L☉ |
| Radius | 11.7 R☉ |
| Mass | 2.95 M☉ (estimated) |
| Right ascension (J2000) | 2h 40m 40.0s |
| Declination (J2000) | −39° 51′ 19″ |
| Space velocity (relative to the Sun) | 30.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.11). Visible from the whole Southern Hemisphere and north to latitude 50° N. South of latitude 50° S it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1880. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.6 million years.
The Sun seen from there
From a planet around ι Eri, the Sun would look like a star of magnitude 8.09, 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):
- HIP 12413 7.93 light-years
- HIP 12716 11.5 light-years
- HIP 11989 15.0 light-years
- HIP 10741 15.6 light-years
- HIP 13841 15.7 light-years
- HIP 14857 16.8 light-years
- 2MASS J02192210-3925225 18.1 light-years
- 2MASS J02192210-3925225B 18.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.