Star · K0III
υ¹ Eri
υ¹ Eri is a giant star of spectral type K0III in the constellation Eridanus, 125.3 light-years from the Sun.
| Other names | HIP 21248 |
|---|---|
| Constellation | Eridanus |
| Distance | 125.3 light-years (38.4 pc) |
| Apparent magnitude | magnitude 4.49 |
| Absolute magnitude | magnitude 1.57 |
| Spectral type | K0III |
| Surface temperature | 4,810 K |
| Luminosity | 30.5 L☉ |
| Radius | 7.94 R☉ |
| Mass | 2.41 M☉ (estimated) |
| Right ascension (J2000) | 4h 33m 30.6s |
| Declination (J2000) | −29° 45′ 59″ |
| Space velocity (relative to the Sun) | 57.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.49). Visible from the whole Southern Hemisphere and north to latitude 60° N. South of latitude 60° 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 1901. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.2 million years.
The Sun seen from there
From a planet around υ¹ Eri, the Sun would look like a star of magnitude 7.75, in the direction where our sky has the constellation Hercules. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 21778 7.61 light-years
- HIP 21539 9.20 light-years
- HIP 20737 9.70 light-years
- HIP 20478 12.3 light-years
- HIP 22395 13.5 light-years
- HIP 22373 13.8 light-years
- Gl 167.2 14.4 light-years
- HIP 23248 17.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.