Star · K0
HIP 17558
HIP 17558 is a supergiant star of spectral type K0 in the constellation Perseus, 435.6 light-years from the Sun.
| Constellation | Perseus |
|---|---|
| Distance | 435.6 light-years (133.6 pc) |
| Apparent magnitude | magnitude 6.45 |
| Absolute magnitude | magnitude 0.82 |
| Spectral type | K0 |
| Surface temperature | 4,320 K |
| Luminosity | 84.4 L☉ |
| Radius | 16.4 R☉ |
| Mass | 3.23 M☉ (estimated) |
| Right ascension (J2000) | 3h 45m 37.1s |
| Declination (J2000) | +38° 40′ 35″ |
| Space velocity (relative to the Sun) | 51.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.45). Visible from the whole Northern Hemisphere and south to latitude 51° S. North of latitude 51° N it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1590. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.7 million years.
The Sun seen from there
From a planet around HIP 17558, the Sun would look like a star of magnitude 10.46, in the direction where our sky has the constellation Lupus. 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.