Star · ?
GJ 3799
GJ 3799 is a main-sequence star of spectral type ? in the constellation Boötes, 108.1 light-years from the Sun.
| Constellation | Boötes |
|---|---|
| Distance | 108.1 light-years (33.1 pc) |
| Apparent magnitude | magnitude 12.09 |
| Absolute magnitude | magnitude 9.49 |
| Spectral type | ? |
| Surface temperature | 3,790 K |
| Luminosity | 0.0504 L☉ |
| Radius | 0.52 R☉ |
| Mass | 0.474 M☉ (estimated) |
| Right ascension (J2000) | 13h 41m 32.3s |
| Declination (J2000) | +14° 49′ 23″ |
| Space velocity (relative to the Sun) | 40.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.09. 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 April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1918. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.9 million years.
The Sun seen from there
From a planet around GJ 3799, the Sun would look like a star of magnitude 7.43, in the direction where our sky has the constellation Cetus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- ULAS J132605.18+120009.9 9.47 light-years
- SDSS J135712.40+142839.8 10.1 light-years
- HIP 65371 10.8 light-years
- ULAS J134403.78+083951.0 11.7 light-years
- HIP 68447 13.1 light-years
- HIP 67904 13.1 light-years
- HIP 65120 13.2 light-years
- 2MASS J13184794+1736117 13.2 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.