Star · K2
Gl 340.3
Gl 340.3 is a main-sequence star of spectral type K2 in the constellation Hydra, 78.8 light-years from the Sun.
| Other names | HIP 45839 |
|---|---|
| Constellation | Hydra |
| Distance | 78.8 light-years (24.1 pc) |
| Apparent magnitude | magnitude 9.10 |
| Absolute magnitude | magnitude 7.19 |
| Spectral type | K2 |
| Surface temperature | 4,380 K |
| Luminosity | 0.228 L☉ |
| Radius | 0.828 R☉ |
| Mass | 0.691 M☉ (estimated) |
| Right ascension (J2000) | 9h 20m 44.3s |
| Declination (J2000) | −5° 45′ 14″ |
| Space velocity (relative to the Sun) | 57.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.10. Visible from the whole Southern Hemisphere and north to latitude 84° 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 1947. 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 Gl 340.3, the Sun would look like a star of magnitude 6.74, in the direction where our sky has the constellation Equuleus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 9299 3.07 light-years
- DENIS-P J090957.1-065806 4.43 light-years
- GJ 3561 5.57 light-years
- CWISE J095316.32-094318.9 12.3 light-years
- GJ 3527 12.5 light-years
- GJ 3555 12.7 light-years
- Gl 346 13.2 light-years
- WISEPC J092906.77+040957.9 14.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.