Star · M2V
GJ 3992
GJ 3992 is a main-sequence star of spectral type M2V in the constellation Hercules, 39.3 light-years from the Sun.
| Other names | HIP 84099 |
|---|---|
| Constellation | Hercules |
| Distance | 39.3 light-years (12.0 pc) |
| Apparent magnitude | magnitude 11.54 |
| Absolute magnitude | magnitude 11.14 |
| Spectral type | M2V |
| Surface temperature | 3,240 K |
| Luminosity | 0.0287 L☉ |
| Radius | 0.538 R☉ |
| Mass | 0.405 M☉ (estimated) |
| Right ascension (J2000) | 17h 11m 34.7s |
| Declination (J2000) | +38° 26′ 35″ |
| Space velocity (relative to the Sun) | 46.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.54. Visible from the whole Northern Hemisphere and south to latitude 52° S. North of latitude 52° 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 1987. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 697 thousand years.
The Sun seen from there
From a planet around GJ 3992, the Sun would look like a star of magnitude 5.23, in the direction where our sky has the constellation Columba. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 671 2.59 light-years
- GJ 3959 5.94 light-years
- WISEPA J165311.05+444423.9 6.39 light-years
- GJ 1223 7.01 light-years
- Gl 635B 7.23 light-years
- ζ Her 7.36 light-years
- Gl 706 8.07 light-years
- 2MASS J17312974+2721233 8.08 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.