Star · K3
HIP 23475
HIP 23475 is a supergiant star of spectral type K3 in the constellation Eridanus, 306.1 light-years from the Sun.
| Constellation | Eridanus |
|---|---|
| Distance | 306.1 light-years (93.9 pc) |
| Apparent magnitude | magnitude 5.86 |
| Absolute magnitude | magnitude 1.00 |
| Spectral type | K3 |
| Surface temperature | 4,290 K |
| Luminosity | 73.8 L☉ |
| Radius | 15.6 R☉ |
| Mass | 3.1 M☉ (estimated) |
| Right ascension (J2000) | 5h 02m 45.4s |
| Declination (J2000) | −4° 12′ 37″ |
| Space velocity (relative to the Sun) | 42.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.86). Visible from the whole Southern Hemisphere and north to latitude 86° N. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1720. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.4 million years.
The Sun seen from there
From a planet around HIP 23475, the Sun would look like a star of magnitude 9.69, in the direction where our sky has the constellation Ophiuchus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 66 Eri 6.18 light-years
- HIP 23930 18.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.