Star · K5
GJ 9757
GJ 9757 is a main-sequence star of spectral type K5 in the constellation Capricornus, 100.0 light-years from the Sun.
| Other names | HIP 107758 |
|---|---|
| Constellation | Capricornus |
| Distance | 100.0 light-years (30.7 pc) |
| Apparent magnitude | magnitude 10.85 |
| Absolute magnitude | magnitude 8.42 |
| Spectral type | K5 |
| Surface temperature | 4,010 K |
| Luminosity | 0.105 L☉ |
| Radius | 0.672 R☉ |
| Mass | 0.569 M☉ (estimated) |
| Right ascension (J2000) | 21h 49m 45.9s |
| Declination (J2000) | −11° 40′ 57″ |
| Space velocity (relative to the Sun) | 66.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.85. Visible from the whole Southern Hemisphere and north to latitude 78° N. South of latitude 78° S 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 1926. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.8 million years.
The Sun seen from there
From a planet around GJ 9757, the Sun would look like a star of magnitude 7.26, in the direction where our sky has the constellation Leo. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- SIMP J21543454-1055308 2.45 light-years
- Gl 836.4 5.61 light-years
- GJ 4263 11.7 light-years
- 2MASS J21542494-1023022 12.3 light-years
- HIP 108468 12.4 light-years
- μ Cap 13.1 light-years
- GJ 9763 14.0 light-years
- 2MASS J21324898-1452544 14.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.