Star · K0III
ψ Cas
ψ Cas is a giant star of spectral type K0III in the constellation Cassiopeia, 200.8 light-years from the Sun.
| Other names | HIP 6692 |
|---|---|
| Constellation | Cassiopeia |
| Distance | 200.8 light-years (61.6 pc) |
| Apparent magnitude | magnitude 4.72 |
| Absolute magnitude | magnitude 0.77 |
| Spectral type | K0III |
| Surface temperature | 4,630 K |
| Luminosity | 70.2 L☉ |
| Radius | 13 R☉ |
| Mass | 3.06 M☉ (estimated) |
| Right ascension (J2000) | 1h 25m 56.0s |
| Declination (J2000) | +68° 07′ 48″ |
| Space velocity (relative to the Sun) | 26.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.72). Visible from the whole Northern Hemisphere and south to latitude 22° S. North of latitude 22° N 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 1825. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.6 million years.
The Sun seen from there
From a planet around ψ Cas, the Sun would look like a star of magnitude 8.78, in the direction where our sky has the constellation Musca. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 5531 9.53 light-years
- HIP 4446 12.8 light-years
- HIP 6596 19.3 light-years
- HIP 3860 20.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.