Star · M1III
12 Cep
12 Cep is a giant star of spectral type M1III in the constellation Cepheus, 413.0 light-years from the Sun.
| Other names | HIP 107586 |
|---|---|
| Constellation | Cepheus |
| Distance | 413.0 light-years (126.6 pc) |
| Apparent magnitude | magnitude 5.53 |
| Absolute magnitude | magnitude 0.02 |
| Spectral type | M1III |
| Surface temperature | 3,680 K |
| Luminosity | 361 L☉ |
| Radius | 46.6 R☉ |
| Mass | 4.89 M☉ (estimated) |
| Right ascension (J2000) | 21h 47m 25.3s |
| Declination (J2000) | +60° 41′ 34″ |
| Space velocity (relative to the Sun) | 22.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.53). Visible from the whole Northern Hemisphere and south to latitude 29° S. North of latitude 29° N it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1613. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.3 million years.
The Sun seen from there
From a planet around 12 Cep, the Sun would look like a star of magnitude 10.34, in the direction where our sky has the constellation Carina. 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.