Star · K7V
GJ 1091
GJ 1091 is a main-sequence star of spectral type K7V in the constellation Auriga, 125.4 light-years from the Sun.
| Constellation | Auriga |
|---|---|
| Distance | 125.4 light-years (38.5 pc) |
| Apparent magnitude | magnitude 13.34 |
| Absolute magnitude | magnitude 10.42 |
| Spectral type | K7V |
| Surface temperature | 4,030 K |
| Luminosity | 0.0161 L☉ |
| Radius | 0.26 R☉ |
| Mass | 0.315 M☉ (estimated) |
| Right ascension (J2000) | 6h 48m 49.9s |
| Declination (J2000) | +37° 08′ 42″ |
| Space velocity (relative to the Sun) | 34.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.34. Visible from the whole Northern Hemisphere and south to latitude 53° S. North of latitude 53° N it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1901. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.2 million years.
The Sun seen from there
From a planet around GJ 1091, the Sun would look like a star of magnitude 7.75, in the direction where our sky has the constellation Corona Australis. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 32673 7.33 light-years
- WISEA J071138.88+370601.0 10.2 light-years
- WISEA J062858.69+345249.2 10.5 light-years
- HIP 31143 10.6 light-years
- HIP 30944 10.7 light-years
- HIP 35198 14.2 light-years
- Nervia 16.8 light-years
- HIP 32702 18.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.