Star · G2III
GJ 3680
GJ 3680 is a giant star of spectral type G2III in the constellation Hydra, 141.1 light-years from the Sun.
| Other names | HIP 57001 |
|---|---|
| Constellation | Hydra |
| Distance | 141.1 light-years (43.3 pc) |
| Apparent magnitude | magnitude 6.44 |
| Absolute magnitude | magnitude 3.26 |
| Spectral type | G2III |
| Surface temperature | 5,770 K |
| Luminosity | 4.61 L☉ |
| Radius | 2.15 R☉ |
| Mass | 1.47 M☉ (estimated) |
| Right ascension (J2000) | 11h 41m 08.4s |
| Declination (J2000) | −29° 11′ 47″ |
| Space velocity (relative to the Sun) | 79.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.44). Visible from the whole Southern Hemisphere and north to latitude 61° N. South of latitude 61° S it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1885. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around GJ 3680, the Sun would look like a star of magnitude 8.01, in the direction where our sky has the constellation Pegasus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 58029 7.90 light-years
- ξ Hya 12.9 light-years
- HIP 57039 15.0 light-years
- GJ 2084A 15.3 light-years
- HIP 58397 17.9 light-years
- HIP 55165 18.2 light-years
- HD 98649 18.6 light-years
- PSO J168.1800-27.2264 18.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.