Star · K5III
ψ⁴ Aur
ψ⁴ Aur is a giant star of spectral type K5III in the constellation Auriga, 322.7 light-years from the Sun.
| Other names | HIP 32173 |
|---|---|
| Constellation | Auriga |
| Distance | 322.7 light-years (98.9 pc) |
| Apparent magnitude | magnitude 5.04 |
| Absolute magnitude | magnitude 0.06 |
| Spectral type | K5III |
| Surface temperature | 3,830 K |
| Luminosity | 285 L☉ |
| Radius | 38.4 R☉ |
| Mass | 4.57 M☉ (estimated) |
| Right ascension (J2000) | 6h 43m 05.0s |
| Declination (J2000) | +44° 31′ 28″ |
| Space velocity (relative to the Sun) | 80.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.04). Visible from the whole Northern Hemisphere and south to latitude 45° S. North of latitude 45° N it never sets. 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 1703. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.7 million years.
The Sun seen from there
From a planet around ψ⁴ Aur, the Sun would look like a star of magnitude 9.81, in the direction where our sky has the constellation Corona Australis. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 33056 10.3 light-years
- HIP 32763 11.7 light-years
- HIP 31013 19.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.