Star · K0III
ο Cep
ο Cep is a giant star of spectral type K0III in the constellation Cepheus, 199.8 light-years from the Sun.
| Other names | HIP 115088 |
|---|---|
| Constellation | Cepheus |
| Distance | 199.8 light-years (61.3 pc) |
| Apparent magnitude | magnitude 4.75 |
| Absolute magnitude | magnitude 0.81 |
| Spectral type | K0III |
| Surface temperature | 5,170 K |
| Luminosity | 51.7 L☉ |
| Radius | 8.95 R☉ |
| Mass | 2.8 M☉ (estimated) |
| Right ascension (J2000) | 23h 18m 37.5s |
| Declination (J2000) | +68° 06′ 41″ |
| Space velocity (relative to the Sun) | 24.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.75). 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 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 1826. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.5 million years.
The Sun seen from there
From a planet around ο Cep, the Sun would look like a star of magnitude 8.77, in the direction where our sky has the constellation Carina. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 112946 8.85 light-years
- HIP 112970 9.13 light-years
- HIP 112670 9.71 light-years
- HIP 116101 9.77 light-years
- HIP 115770 14.8 light-years
- HIP 142 16.0 light-years
- HIP 115894 16.7 light-years
- HIP 113517 17.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.