Star · K1III
1 Peg
1 Peg is a giant star of spectral type K1III in the constellation Pegasus, 156.4 light-years from the Sun.
| Other names | HIP 105502 |
|---|---|
| Constellation | Pegasus |
| Distance | 156.4 light-years (48.0 pc) |
| Apparent magnitude | magnitude 4.08 |
| Absolute magnitude | magnitude 0.68 |
| Spectral type | K1III |
| Surface temperature | 4,500 K |
| Luminosity | 84.1 L☉ |
| Radius | 15.1 R☉ |
| Mass | 3.22 M☉ (estimated) |
| Right ascension (J2000) | 21h 22m 05.2s |
| Declination (J2000) | +19° 48′ 16″ |
| Space velocity (relative to the Sun) | 82.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.08). Visible from the whole Northern Hemisphere and south to latitude 70° S. North of latitude 70° 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 1870. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.8 million years.
The Sun seen from there
From a planet around 1 Peg, the Sun would look like a star of magnitude 8.23, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 105860 6.69 light-years
- HIP 107175 14.6 light-years
- HIP 105254 15.0 light-years
- HIP 104471 15.6 light-years
- Solaris 15.8 light-years
- HIP 104419 16.0 light-years
- HIP 104128 16.4 light-years
- HIP 103784 16.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.