Star · M4
Gl 831A
Gl 831A is a main-sequence star of spectral type M4 in the constellation Capricornus, 24.3 light-years from the Sun.
| Other names | HIP 106255 |
|---|---|
| Constellation | Capricornus |
| Distance | 24.3 light-years (7.46 pc) |
| Apparent magnitude | magnitude 11.96 |
| Absolute magnitude | magnitude 12.60 |
| Spectral type | M4 |
| Surface temperature | 3,510 K |
| Luminosity | 0.00441 L☉ |
| Radius | 0.179 R☉ |
| Mass | 0.179 M☉ (estimated) |
| Right ascension (J2000) | 21h 31m 18.0s |
| Declination (J2000) | −9° 47′ 25″ |
| Space velocity (relative to the Sun) | 71.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.96. Visible from the whole Southern Hemisphere and north to latitude 80° N. 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 2002. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 432 thousand years.
The Sun seen from there
From a planet around Gl 831A, the Sun would look like a star of magnitude 4.19, in the direction where our sky has the constellation Leo. 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.