Star · G8III
ζ Hya
ζ Hya is a giant star of spectral type G8III in the constellation Hydra, 153.0 light-years from the Sun.
| Other names | HIP 43813 |
|---|---|
| Constellation | Hydra |
| Distance | 153.0 light-years (46.9 pc) |
| Apparent magnitude | magnitude 3.11 |
| Absolute magnitude | magnitude −0.25 |
| Spectral type | G8III |
| Surface temperature | 4,800 K |
| Luminosity | 163 L☉ |
| Radius | 18.5 R☉ |
| Mass | 3.89 M☉ (estimated) |
| Right ascension (J2000) | 8h 55m 23.7s |
| Declination (J2000) | +5° 56′ 44″ |
| Space velocity (relative to the Sun) | 32.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.11). Visible from the whole Northern Hemisphere and south to latitude 84° S. 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 1873. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.7 million years.
The Sun seen from there
From a planet around ζ Hya, the Sun would look like a star of magnitude 8.19, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 44137 5.41 light-years
- HIP 43988 10.0 light-years
- HIP 44520 11.7 light-years
- HIP 44518 12.6 light-years
- HIP 43516 15.2 light-years
- ULAS J085342.94+000651.8 15.6 light-years
- SIMP J09155650+0514212 15.6 light-years
- ULAS J085715.96+091325.3 16.2 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.