Star · K5
GJ 9543C
GJ 9543C is a main-sequence star of spectral type K5 in the constellation Lupus, 138.2 light-years from the Sun.
| Constellation | Lupus |
|---|---|
| Distance | 138.2 light-years (42.4 pc) |
| Apparent magnitude | magnitude 11.10 |
| Absolute magnitude | magnitude 7.96 |
| Spectral type | K5 |
| Surface temperature | 4,500 K |
| Luminosity | 0.102 L☉ |
| Radius | 0.524 R☉ |
| Mass | 0.565 M☉ (estimated) |
| Right ascension (J2000) | 16h 05m 38.9s |
| Declination (J2000) | −32° 51′ 53″ |
| Space velocity (relative to the Sun) | 87.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.10. Visible from the whole Southern Hemisphere and north to latitude 57° N. South of latitude 57° S it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1888. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around GJ 9543C, the Sun would look like a star of magnitude 7.97, in the direction where our sky has the constellation Perseus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.