Star · ?
GJ 4002
GJ 4002 is a main-sequence star of spectral type ? in the constellation Hercules, 69.3 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 69.3 light-years (21.3 pc) |
| Apparent magnitude | magnitude 13.02 |
| Absolute magnitude | magnitude 11.38 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.0108 L☉ |
| Radius | 0.26 R☉ |
| Mass | 0.265 M☉ (estimated) |
| Right ascension (J2000) | 17h 18m 22.0s |
| Declination (J2000) | +18° 08′ 50″ |
| Space velocity (relative to the Sun) | 24.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.02. Visible from the whole Northern Hemisphere and south to latitude 72° S. North of latitude 72° 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 1957. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.2 million years.
The Sun seen from there
From a planet around GJ 4002, the Sun would look like a star of magnitude 6.47, in the direction where our sky has the constellation Lepus. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 84195 2.19 light-years
- GJ 1208 7.24 light-years
- GJ 4015 7.51 light-years
- Gl 692.1 8.57 light-years
- WISE J172134.46+111739.4 9.34 light-years
- Gl 686.1B 9.69 light-years
- Gl 686.1A 9.70 light-years
- SDSSp J175032.96+175903.9 9.94 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.