Star · ?
GJ 4131
GJ 4131 is a main-sequence star of spectral type ? in the constellation Sagittarius, 76.4 light-years from the Sun.
| Constellation | Sagittarius |
|---|---|
| Distance | 76.4 light-years (23.4 pc) |
| Apparent magnitude | magnitude 14.50 |
| Absolute magnitude | magnitude 12.65 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.00336 L☉ |
| Radius | 0.145 R☉ |
| Mass | 0.159 M☉ (estimated) |
| Right ascension (J2000) | 20h 04m 06.5s |
| Declination (J2000) | −31° 41′ 54″ |
| Space velocity (relative to the Sun) | 92.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.50. Visible from the whole Southern Hemisphere and north to latitude 58° N. South of latitude 58° S it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1950. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around GJ 4131, the Sun would look like a star of magnitude 6.68, in the direction where our sky has the constellation Gemini. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 773.4 5.04 light-years
- Terebellum 7.59 light-years
- WISE J201748.72-342102.5 8.81 light-years
- GJ 4137 9.65 light-years
- HIP 96710 11.1 light-years
- GJ 1239 12.2 light-years
- GJ 4162 12.3 light-years
- GJ 4157 12.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.