Star · F2III
Caph
Caph is a giant star of spectral type F2III in the constellation Cassiopeia, 54.7 light-years from the Sun.
| Other names | β Cas · Gl 8 · HIP 746 |
|---|---|
| Constellation | Cassiopeia |
| Distance | 54.7 light-years (16.8 pc) |
| Apparent magnitude | magnitude 2.28 |
| Absolute magnitude | magnitude 1.16 |
| Spectral type | F2III |
| Surface temperature | 6,990 K |
| Luminosity | 29.3 L☉ |
| Radius | 3.69 R☉ |
| Mass | 2.38 M☉ (estimated) |
| Right ascension (J2000) | 0h 09m 10.7s |
| Declination (J2000) | +59° 08′ 59″ |
| Space velocity (relative to the Sun) | 44.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 2.28). Visible from the whole Northern Hemisphere and south to latitude 31° S. North of latitude 31° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1971. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 971 thousand years.
The Sun seen from there
From a planet around Caph, the Sun would look like a star of magnitude 5.95, in the direction where our sky has the constellation Crux. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.