Star · B3III
18 Peg
18 Peg is a giant star of spectral type B3III in the constellation Pegasus, 1,501 light-years from the Sun.
| Other names | HIP 108612 |
|---|---|
| Constellation | Pegasus |
| Distance | 1,501 light-years (460.1 pc) |
| Apparent magnitude | magnitude 6.00 |
| Absolute magnitude | magnitude −2.31 |
| Spectral type | B3III |
| Surface temperature | 11,780 K |
| Luminosity | 1,330 L☉ |
| Radius | 8.74 R☉ |
| Mass | 7.09 M☉ (estimated) |
| Right ascension (J2000) | 22h 00m 07.9s |
| Declination (J2000) | +6° 43′ 03″ |
| Space velocity (relative to the Sun) | 36.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.00). Visible from the whole Northern Hemisphere and south to latitude 83° S. 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 525. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 27 million years.
The Sun seen from there
From a planet around 18 Peg, the Sun would look like a star of magnitude 13.14, in the direction where our sky has the constellation Sextans. 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.