Star · K8
GJ 4020A
GJ 4020A is a main-sequence star of spectral type K8 in the constellation Draco, 103.7 light-years from the Sun.
| Constellation | Draco |
|---|---|
| Distance | 103.7 light-years (31.8 pc) |
| Apparent magnitude | magnitude 10.28 |
| Absolute magnitude | magnitude 7.77 |
| Spectral type | K8 |
| Surface temperature | 4,250 K |
| Luminosity | 0.149 L☉ |
| Radius | 0.712 R☉ |
| Mass | 0.621 M☉ (estimated) |
| Right ascension (J2000) | 17h 38m 39.3s |
| Declination (J2000) | +61° 14′ 15″ |
| Space velocity (relative to the Sun) | 6.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.28. Visible from the whole Northern Hemisphere and south to latitude 29° S. North of latitude 29° N it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1922. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.8 million years.
The Sun seen from there
From a planet around GJ 4020A, the Sun would look like a star of magnitude 7.34, in the direction where our sky has the constellation Dorado. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 86346 0.00 light-years
- HIP 84203 7.13 light-years
- HIP 87457 9.55 light-years
- ν¹ Dra 12.1 light-years
- Grumium 12.4 light-years
- ν² Dra 12.4 light-years
- SDSS J173101.41+531047.9 15.5 light-years
- GJ 3993 15.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.