Star · K8
GJ 4047
GJ 4047 is a main-sequence star of spectral type K8 in the constellation Hercules, 100.2 light-years from the Sun.
| Other names | HIP 89656 |
|---|---|
| Constellation | Hercules |
| Distance | 100.2 light-years (30.7 pc) |
| Apparent magnitude | magnitude 9.59 |
| Absolute magnitude | magnitude 7.15 |
| Spectral type | K8 |
| Surface temperature | 4,720 K |
| Luminosity | 0.187 L☉ |
| Radius | 0.646 R☉ |
| Mass | 0.657 M☉ (estimated) |
| Right ascension (J2000) | 18h 17m 49.8s |
| Declination (J2000) | +26° 40′ 17″ |
| Space velocity (relative to the Sun) | 70.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.59. Visible from the whole Northern Hemisphere and south to latitude 63° S. North of latitude 63° 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 1926. 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 4047, the Sun would look like a star of magnitude 7.27, in the direction where our sky has the constellation Canis Major. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 89912 6.24 light-years
- PSO J277.3873+26.0116 6.33 light-years
- HIP 88848 7.96 light-years
- GJ 4039A 11.2 light-years
- HD 164595 11.3 light-years
- HIP 88637 12.2 light-years
- PSO J274.0908+30.5470 12.9 light-years
- WISE J184041.77+293229.2 13.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.