Star · M3
GJ 3731A
GJ 3731A is a main-sequence star of spectral type M3 in the constellation Virgo, 69.4 light-years from the Sun.
| Constellation | Virgo |
|---|---|
| Distance | 69.4 light-years (21.3 pc) |
| Apparent magnitude | magnitude 13.00 |
| Absolute magnitude | magnitude 11.36 |
| Spectral type | M3 |
| Surface temperature | 3,850 K |
| Luminosity | 0.00831 L☉ |
| Radius | 0.204 R☉ |
| Mass | 0.236 M☉ (estimated) |
| Right ascension (J2000) | 12h 29m 54.7s |
| Declination (J2000) | −5° 27′ 27″ |
| Space velocity (relative to the Sun) | 65.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.00. Visible from the whole Southern Hemisphere and north to latitude 85° N. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1957. 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 3731A, the Sun would look like a star of magnitude 6.47, in the direction where our sky has the constellation Pisces. 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.