Star · B8I
53 Cas
53 Cas is a supergiant star of spectral type B8I in the constellation Cassiopeia, 3,028 light-years from the Sun.
| Other names | HIP 9573 |
|---|---|
| Constellation | Cassiopeia |
| Distance | 3,028 light-years (928.5 pc) |
| Apparent magnitude | magnitude 5.59 |
| Absolute magnitude | magnitude −4.25 |
| Spectral type | B8I |
| Surface temperature | 7,310 K |
| Luminosity | 4,300 L☉ |
| Radius | 40.9 R☉ |
| Mass | 9.92 M☉ (estimated) |
| Right ascension (J2000) | 2h 03m 00.2s |
| Declination (J2000) | +64° 23′ 24″ |
| Space velocity (relative to the Sun) | 22.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.59). Visible from the whole Northern Hemisphere and south to latitude 26° S. North of latitude 26° 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 1003 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 54 million years.
The Sun seen from there
From a planet around 53 Cas, the Sun would look like a star of magnitude 14.67, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.