Star · ?
GJ 3791
GJ 3791 is a main-sequence star of spectral type ? in the constellation Hydra, 77.9 light-years from the Sun.
| Constellation | Hydra |
|---|---|
| Distance | 77.9 light-years (23.9 pc) |
| Apparent magnitude | magnitude 14.00 |
| Absolute magnitude | magnitude 12.11 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.00554 L☉ |
| Radius | 0.186 R☉ |
| Mass | 0.198 M☉ (estimated) |
| Right ascension (J2000) | 13h 34m 24.1s |
| Declination (J2000) | −26° 22′ 17″ |
| Space velocity (relative to the Sun) | 89.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.00. Visible from the whole Southern Hemisphere and north to latitude 64° N. South of latitude 64° S 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 1948. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around GJ 3791, the Sun would look like a star of magnitude 6.72, in the direction where our sky has the constellation Pisces. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 2MASS J14044941-3159329 11.8 light-years
- GJ 3810 11.9 light-years
- HIP 67761 12.8 light-years
- Gl 500 13.0 light-years
- 2MASS J13411160-3052505 13.6 light-years
- HIP 65669 13.7 light-years
- Kelu-1 14.0 light-years
- 2MASS J14090310-3357565 14.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.