Star · M3
Gl 157B
Gl 157B is a main-sequence star of spectral type M3 in the constellation Eridanus, 49.8 light-years from the Sun.
| Constellation | Eridanus |
|---|---|
| Distance | 49.8 light-years (15.3 pc) |
| Apparent magnitude | magnitude 11.61 |
| Absolute magnitude | magnitude 10.69 |
| Spectral type | M3 |
| Surface temperature | 3,840 K |
| Luminosity | 0.0157 L☉ |
| Radius | 0.283 R☉ |
| Mass | 0.311 M☉ (estimated) |
| Right ascension (J2000) | 3h 57m 29.0s |
| Declination (J2000) | −1° 09′ 22″ |
| Space velocity (relative to the Sun) | 18.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.61. Visible from the whole Southern Hemisphere and north to latitude 89° N. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1976. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 883 thousand years.
The Sun seen from there
From a planet around Gl 157B, the Sun would look like a star of magnitude 5.75, in the direction where our sky has the constellation Serpens. 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.