Star · K0III
17 Del
17 Del is a giant star of spectral type K0III in the constellation Delphinus, 516.6 light-years from the Sun.
| Other names | HIP 103294 |
|---|---|
| Constellation | Delphinus |
| Distance | 516.6 light-years (158.4 pc) |
| Apparent magnitude | magnitude 5.19 |
| Absolute magnitude | magnitude −0.81 |
| Spectral type | K0III |
| Surface temperature | 4,470 K |
| Luminosity | 336 L☉ |
| Radius | 30.5 R☉ |
| Mass | 4.79 M☉ (estimated) |
| Right ascension (J2000) | 20h 55m 36.7s |
| Declination (J2000) | +13° 43′ 18″ |
| Space velocity (relative to the Sun) | 18.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.19). Visible from the whole Northern Hemisphere and south to latitude 76° S. North of latitude 76° N it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1509. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 9.2 million years.
The Sun seen from there
From a planet around 17 Del, the Sun would look like a star of magnitude 10.83, in the direction where our sky has the constellation Hydra. 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.