Star · K2
GJ 2018
GJ 2018 is a main-sequence star of spectral type K2 in the constellation Sculptor, 117.8 light-years from the Sun.
| Other names | HIP 4691 |
|---|---|
| Constellation | Sculptor |
| Distance | 117.8 light-years (36.1 pc) |
| Apparent magnitude | magnitude 9.96 |
| Absolute magnitude | magnitude 7.17 |
| Spectral type | K2 |
| Surface temperature | 4,500 K |
| Luminosity | 0.212 L☉ |
| Radius | 0.757 R☉ |
| Mass | 0.678 M☉ (estimated) |
| Right ascension (J2000) | 1h 00m 18.5s |
| Declination (J2000) | −25° 36′ 53″ |
| Space velocity (relative to the Sun) | 73.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.96. 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 1908. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.1 million years.
The Sun seen from there
From a planet around GJ 2018, the Sun would look like a star of magnitude 7.62, in the direction where our sky has the constellation Coma Berenices. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 5373 4.33 light-years
- WISEA J010631.20-231415.1 5.69 light-years
- Cocibolca 9.81 light-years
- 2MASS J01225093-2439505 12.9 light-years
- GJ 3088 13.4 light-years
- HIP 4855 14.6 light-years
- HIP 7228 15.3 light-years
- VIKING J012834.94-280302.6 15.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.