Star · ?
GJ 4031
GJ 4031 is a main-sequence star of spectral type ? in the constellation Hercules, 103.1 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 103.1 light-years (31.6 pc) |
| Apparent magnitude | magnitude 13.71 |
| Absolute magnitude | magnitude 11.21 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.0127 L☉ |
| Radius | 0.282 R☉ |
| Mass | 0.284 M☉ (estimated) |
| Right ascension (J2000) | 17h 51m 30.3s |
| Declination (J2000) | +14° 45′ 19″ |
| Space velocity (relative to the Sun) | 32.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.71. Visible from the whole Northern Hemisphere and south to latitude 75° S. North of latitude 75° 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 1923. 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 4031, the Sun would look like a star of magnitude 7.33, in the direction where our sky has the constellation Lepus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISEA J174336.62+154901.3 4.74 light-years
- WISE J17405782+1317094 5.48 light-years
- HIP 86623 12.3 light-years
- 2MASSW J1743415+212707 12.7 light-years
- HIP 88637 14.1 light-years
- Gl 708 14.2 light-years
- HIP 87558 15.6 light-years
- HIP 87182 15.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.