Star · B9III
Markab
Markab is a giant star of spectral type B9III in the constellation Pegasus, 133.3 light-years from the Sun.
| Other names | α Peg · HIP 113963 |
|---|---|
| Constellation | Pegasus |
| Distance | 133.3 light-years (40.9 pc) |
| Apparent magnitude | magnitude 2.49 |
| Absolute magnitude | magnitude −0.57 |
| Spectral type | B9III |
| Surface temperature | 10,150 K |
| Luminosity | 203 L☉ |
| Radius | 4.61 R☉ |
| Mass | 4.15 M☉ (estimated) |
| Right ascension (J2000) | 23h 04m 45.7s |
| Declination (J2000) | +15° 12′ 19″ |
| Space velocity (relative to the Sun) | 14.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 2.49). Visible from the whole Northern Hemisphere and south to latitude 75° S. North of latitude 75° 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 1893. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.4 million years.
The Sun seen from there
From a planet around Markab, the Sun would look like a star of magnitude 7.89, in the direction where our sky has the constellation Crater. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 114028 3.71 light-years
- HIP 113495 7.58 light-years
- HIP 113994 8.20 light-years
- HIP 114081 8.21 light-years
- HIP 113086 12.9 light-years
- HR 8799 13.9 light-years
- HIP 112389 14.0 light-years
- HIP 112523 14.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.