Star · F4III
20 Peg
20 Peg is a giant star of spectral type F4III in the constellation Pegasus, 225.9 light-years from the Sun.
| Other names | HIP 108693 |
|---|---|
| Constellation | Pegasus |
| Distance | 225.9 light-years (69.3 pc) |
| Apparent magnitude | magnitude 5.61 |
| Absolute magnitude | magnitude 1.41 |
| Spectral type | F4III |
| Surface temperature | 7,240 K |
| Luminosity | 23.4 L☉ |
| Radius | 3.07 R☉ |
| Mass | 2.24 M☉ (estimated) |
| Right ascension (J2000) | 22h 01m 05.3s |
| Declination (J2000) | +13° 07′ 11″ |
| Space velocity (relative to the Sun) | 27.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.61). Visible from the whole Northern Hemisphere and south to latitude 77° S. North of latitude 77° 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 1800. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.0 million years.
The Sun seen from there
From a planet around 20 Peg, the Sun would look like a star of magnitude 9.03, 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 108949 10.4 light-years
- HIP 107919 12.0 light-years
- HIP 109067 14.8 light-years
- HIP 108408 19.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.