Star · G9III
87 Peg
87 Peg is a giant star of spectral type G9III in the constellation Pegasus, 301.2 light-years from the Sun.
| Other names | HIP 729 |
|---|---|
| Constellation | Pegasus |
| Distance | 301.2 light-years (92.3 pc) |
| Apparent magnitude | magnitude 5.57 |
| Absolute magnitude | magnitude 0.74 |
| Spectral type | G9III |
| Surface temperature | 4,640 K |
| Luminosity | 71.8 L☉ |
| Radius | 13.1 R☉ |
| Mass | 3.08 M☉ (estimated) |
| Right ascension (J2000) | 0h 09m 02.4s |
| Declination (J2000) | +18° 12′ 43″ |
| Space velocity (relative to the Sun) | 65.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.57). Visible from the whole Northern Hemisphere and south to latitude 72° S. North of latitude 72° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1725. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.3 million years.
The Sun seen from there
From a planet around 87 Peg, the Sun would look like a star of magnitude 9.66, in the direction where our sky has the constellation Corvus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 1156 11.0 light-years
- HIP 206 13.3 light-years
- HIP 768 16.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.