Star · F9V
Gl 857
Gl 857 is a main-sequence star of spectral type F9V in the constellation Tucana, 66.3 light-years from the Sun.
| Other names | HIP 110649 |
|---|---|
| Constellation | Tucana |
| Distance | 66.3 light-years (20.3 pc) |
| Apparent magnitude | magnitude 5.31 |
| Absolute magnitude | magnitude 3.77 |
| Spectral type | F9V |
| Surface temperature | 5,720 K |
| Luminosity | 2.92 L☉ |
| Radius | 1.74 R☉ |
| Mass | 1.31 M☉ (estimated) |
| Right ascension (J2000) | 22h 24m 56.4s |
| Declination (J2000) | −57° 47′ 51″ |
| Space velocity (relative to the Sun) | 39.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.31). Visible from the whole Southern Hemisphere and north to latitude 32° N. South of latitude 32° S it never sets. 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 1960. 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 Gl 857, the Sun would look like a star of magnitude 6.37, 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):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.