Star · K5
GJ 9111
GJ 9111 is a main-sequence star of spectral type K5 in the constellation Perseus, 105.9 light-years from the Sun.
| Other names | HIP 15087 |
|---|---|
| Constellation | Perseus |
| Distance | 105.9 light-years (32.5 pc) |
| Apparent magnitude | magnitude 10.30 |
| Absolute magnitude | magnitude 7.74 |
| Spectral type | K5 |
| Surface temperature | 3,660 K |
| Luminosity | 0.302 L☉ |
| Radius | 1.36 R☉ |
| Mass | 0.741 M☉ (estimated) |
| Right ascension (J2000) | 3h 14m 34.0s |
| Declination (J2000) | +52° 20′ 54″ |
| Space velocity (relative to the Sun) | 99.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.30. Visible from the whole Northern Hemisphere and south to latitude 38° S. North of latitude 38° N it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1920. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.9 million years.
The Sun seen from there
From a planet around GJ 9111, the Sun would look like a star of magnitude 7.39, in the direction where our sky has the constellation Lupus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 14592 8.77 light-years
- UGCS J030013.86+490142.5 9.10 light-years
- HIP 14300 12.8 light-years
- HIP 16581 14.0 light-years
- HIP 13169 14.1 light-years
- SDSS J035104.37+481046.8 14.4 light-years
- HIP 17248 14.5 light-years
- HIP 14985 15.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.