Star · M3
GJ 3131
GJ 3131 is a main-sequence star of spectral type M3 in the constellation Cetus, 69.9 light-years from the Sun.
| Constellation | Cetus |
|---|---|
| Distance | 69.9 light-years (21.4 pc) |
| Apparent magnitude | magnitude 11.21 |
| Absolute magnitude | magnitude 9.56 |
| Spectral type | M3 |
| Surface temperature | 3,850 K |
| Luminosity | 0.0438 L☉ |
| Radius | 0.469 R☉ |
| Mass | 0.457 M☉ (estimated) |
| Right ascension (J2000) | 2h 03m 20.8s |
| Declination (J2000) | −21° 13′ 44″ |
| Space velocity (relative to the Sun) | 47.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.21. Visible from the whole Southern Hemisphere and north to latitude 69° N. South of latitude 69° S it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1956. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.2 million years.
The Sun seen from there
From a planet around GJ 3131, the Sun would look like a star of magnitude 6.48, in the direction where our sky has the constellation Boötes. It would be visible 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.