Star · ?
Gl 820.1
Gl 820.1 is a white dwarf of spectral type ? in the constellation Octans, 52.8 light-years from the Sun.
| Constellation | Octans |
|---|---|
| Distance | 52.8 light-years (16.2 pc) |
| Apparent magnitude | magnitude 13.56 |
| Absolute magnitude | magnitude 12.52 |
| Spectral type | ? |
| Surface temperature | 8,000 K |
| Luminosity | 8.90 × 10⁻⁴ L☉ |
| Radius | 0.012 R☉ |
| Mass | 0.6 M☉ (estimated) |
| Right ascension (J2000) | 21h 13m 15.0s |
| Declination (J2000) | −81° 49′ 14″ |
| Space velocity (relative to the Sun) | 67.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.56. Visible from the whole Southern Hemisphere and north to latitude 8° N. South of latitude 8° S it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1973. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 936 thousand years.
The Sun seen from there
From a planet around Gl 820.1, the Sun would look like a star of magnitude 5.87, in the direction where our sky has the constellation Camelopardalis. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 808 3.72 light-years
- GJ 3021 8.33 light-years
- GJ 1264 9.22 light-years
- WISEPA J234351.20-741847.0 9.70 light-years
- WISE J230228.68-713441.6 10.8 light-years
- WISE J173551.72-820900.1 11.5 light-years
- ν Oct 11.5 light-years
- GJ 1251 11.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.