Star · K7V
GJ 9315
GJ 9315 is a main-sequence star of spectral type K7V in the constellation Hydra, 128.9 light-years from the Sun.
| Other names | HIP 49577 |
|---|---|
| Constellation | Hydra |
| Distance | 128.9 light-years (39.5 pc) |
| Apparent magnitude | magnitude 10.17 |
| Absolute magnitude | magnitude 7.19 |
| Spectral type | K7V |
| Surface temperature | 4,070 K |
| Luminosity | 0.304 L☉ |
| Radius | 1.11 R☉ |
| Mass | 0.743 M☉ (estimated) |
| Right ascension (J2000) | 10h 07m 13.7s |
| Declination (J2000) | −14° 18′ 16″ |
| Space velocity (relative to the Sun) | 23.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.17. Visible from the whole Southern Hemisphere and north to latitude 76° N. South of latitude 76° S it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1897. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.3 million years.
The Sun seen from there
From a planet around GJ 9315, the Sun would look like a star of magnitude 7.81, in the direction where our sky has the constellation Pegasus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- TOI-6478 6.45 light-years
- HIP 49674 8.58 light-years
- HIP 50267 9.31 light-years
- HIP 50534 10.9 light-years
- HD 86065 11.2 light-years
- HIP 49728 12.7 light-years
- BD-08 2823 13.0 light-years
- HIP 51073 13.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.