Star · F0V
GJ 2020
GJ 2020 is a main-sequence star of spectral type F0V in the constellation Sculptor, 780.7 light-years from the Sun.
| Other names | HIP 4819 |
|---|---|
| Constellation | Sculptor |
| Distance | 780.7 light-years (239.3 pc) |
| Apparent magnitude | magnitude 9.75 |
| Absolute magnitude | magnitude 2.85 |
| Spectral type | F0V |
| Surface temperature | 7,140 K |
| Luminosity | 6.15 L☉ |
| Radius | 1.62 R☉ |
| Mass | 1.57 M☉ (estimated) |
| Right ascension (J2000) | 1h 01m 49.3s |
| Declination (J2000) | −25° 53′ 13″ |
| Space velocity (relative to the Sun) | 35.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.75. Visible from the whole Southern Hemisphere and north to latitude 64° N. South of latitude 64° 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 1245. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 14 million years.
The Sun seen from there
From a planet around GJ 2020, the Sun would look like a star of magnitude 11.73, in the direction where our sky has the constellation Coma Berenices. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.