Star · A3
17 Hya
17 Hya is a main-sequence star of spectral type A3 in the constellation Hydra, 298.8 light-years from the Sun.
| Other names | HIP 43822 |
|---|---|
| Constellation | Hydra |
| Distance | 298.8 light-years (91.6 pc) |
| Apparent magnitude | magnitude 6.07 |
| Absolute magnitude | magnitude 1.26 |
| Spectral type | A3 |
| Surface temperature | 8,010 K |
| Luminosity | 28.3 L☉ |
| Radius | 2.76 R☉ |
| Mass | 2.36 M☉ (estimated) |
| Right ascension (J2000) | 8h 55m 29.6s |
| Declination (J2000) | −7° 58′ 16″ |
| Space velocity (relative to the Sun) | 18.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.07). Visible from the whole Southern Hemisphere and north to latitude 82° 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 1727. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.3 million years.
The Sun seen from there
From a planet around 17 Hya, the Sun would look like a star of magnitude 9.64, in the direction where our sky has the constellation Delphinus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 43507 14.6 light-years
- HIP 44119 14.7 light-years
- HIP 44701 17.7 light-years
- HIP 43432 18.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.