Star · K0I
12 Peg
12 Peg is a supergiant star of spectral type K0I in the constellation Pegasus, 1,378 light-years from the Sun.
| Other names | HIP 107472 |
|---|---|
| Constellation | Pegasus |
| Distance | 1,378 light-years (422.4 pc) |
| Apparent magnitude | magnitude 5.29 |
| Absolute magnitude | magnitude −2.84 |
| Spectral type | K0I |
| Surface temperature | 3,980 K |
| Luminosity | 3,410 L☉ |
| Radius | 123 R☉ |
| Mass | 9.28 M☉ (estimated) |
| Right ascension (J2000) | 21h 46m 04.4s |
| Declination (J2000) | +22° 56′ 56″ |
| Space velocity (relative to the Sun) | 20.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.29). Visible from the whole Northern Hemisphere and south to latitude 67° S. North of latitude 67° 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 648. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 24 million years.
The Sun seen from there
From a planet around 12 Peg, the Sun would look like a star of magnitude 12.96, in the direction where our sky has the constellation Hydra. 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.