Star · G2V
Gl 81B
Gl 81B is a main-sequence star of spectral type G2V in the constellation Eridanus, 57.4 light-years from the Sun.
| Constellation | Eridanus |
|---|---|
| Distance | 57.4 light-years (17.6 pc) |
| Apparent magnitude | magnitude 10.70 |
| Absolute magnitude | magnitude 9.47 |
| Spectral type | G2V |
| Surface temperature | 5,780 K |
| Luminosity | 0.0151 L☉ |
| Radius | 0.122 R☉ |
| Mass | 0.306 M☉ (estimated) |
| Right ascension (J2000) | 1h 55m 56.3s |
| Declination (J2000) | −51° 36′ 28″ |
| Space velocity (relative to the Sun) | 61.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.70. Visible from the whole Southern Hemisphere and north to latitude 38° N. South of latitude 38° 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 1969. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.0 million years.
The Sun seen from there
From a planet around Gl 81B, the Sun would look like a star of magnitude 6.06, in the direction where our sky has the constellation Ursa Major. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- χ Eri 0.00 light-years
- HD 10647 3.04 light-years
- 2MASS J01282664-5545343 6.76 light-years
- WISEA J011154.36-505343.2 6.91 light-years
- GJ 3082 7.19 light-years
- HR 810 7.33 light-years
- GJ 1049 9.15 light-years
- ν Phe 11.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.