Star · A4
15 Hya
15 Hya is a main-sequence star of spectral type A4 in the constellation Hydra, 412.9 light-years from the Sun.
| Other names | HIP 43496 |
|---|---|
| Constellation | Hydra |
| Distance | 412.9 light-years (126.6 pc) |
| Apparent magnitude | magnitude 5.55 |
| Absolute magnitude | magnitude 0.04 |
| Spectral type | A4 |
| Surface temperature | 8,570 K |
| Luminosity | 92.9 L☉ |
| Radius | 4.37 R☉ |
| Mass | 3.32 M☉ (estimated) |
| Right ascension (J2000) | 8h 51m 34.4s |
| Declination (J2000) | −7° 10′ 38″ |
| Space velocity (relative to the Sun) | 47.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.55). Visible from the whole Southern Hemisphere and north to latitude 83° N. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1613. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.3 million years.
The Sun seen from there
From a planet around 15 Hya, the Sun would look like a star of magnitude 10.34, in the direction where our sky has the constellation Delphinus. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.