Star · M
Gl 399
Gl 399 is a main-sequence star of spectral type M in the constellation Sextans, 50.8 light-years from the Sun.
| Other names | HIP 52186 |
|---|---|
| Constellation | Sextans |
| Distance | 50.8 light-years (15.6 pc) |
| Apparent magnitude | magnitude 11.28 |
| Absolute magnitude | magnitude 10.32 |
| Spectral type | M |
| Surface temperature | 3,790 K |
| Luminosity | 0.0236 L☉ |
| Radius | 0.357 R☉ |
| Mass | 0.372 M☉ (estimated) |
| Right ascension (J2000) | 10h 39m 40.5s |
| Declination (J2000) | −6° 55′ 26″ |
| Space velocity (relative to the Sun) | 53.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.28. Visible from the whole Southern Hemisphere and north to latitude 83° N. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1975. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 901 thousand years.
The Sun seen from there
From a planet around Gl 399, the Sun would look like a star of magnitude 5.79, in the direction where our sky has the constellation Pegasus. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 2MASSI J1045240-014957 6.76 light-years
- SDSS J104842.84+011158.5 7.56 light-years
- 2MASSI J1010148-040649 9.02 light-years
- Gl 386 9.28 light-years
- Gl 390 9.89 light-years
- GJ 3637 10.0 light-years
- WISE J105553.59-165216.3 10.5 light-years
- Gl 398 10.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.