Star · K2
GJ 9793
GJ 9793 is a main-sequence star of spectral type K2 in the constellation Pegasus, 237.2 light-years from the Sun.
| Other names | HIP 111981 |
|---|---|
| Constellation | Pegasus |
| Distance | 237.2 light-years (72.7 pc) |
| Apparent magnitude | magnitude 10.40 |
| Absolute magnitude | magnitude 6.09 |
| Spectral type | K2 |
| Surface temperature | 4,940 K |
| Luminosity | 0.442 L☉ |
| Radius | 0.906 R☉ |
| Mass | 0.815 M☉ (estimated) |
| Right ascension (J2000) | 22h 40m 58.6s |
| Declination (J2000) | +18° 56′ 10″ |
| Space velocity (relative to the Sun) | 111.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.40. Visible from the whole Northern Hemisphere and south to latitude 71° S. North of latitude 71° 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 1789. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.2 million years.
The Sun seen from there
From a planet around GJ 9793, the Sun would look like a star of magnitude 9.14, 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 111823 14.6 light-years
- HIP 111108 17.6 light-years
- HIP 112743 18.4 light-years
- HIP 112063 18.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.