Star · K5
HIP 91820
HIP 91820 is a supergiant star of spectral type K5 in the constellation Lyra, 1,501 light-years from the Sun.
| Constellation | Lyra |
|---|---|
| Distance | 1,501 light-years (460.3 pc) |
| Apparent magnitude | magnitude 6.45 |
| Absolute magnitude | magnitude −1.87 |
| Spectral type | K5 |
| Surface temperature | 3,660 K |
| Luminosity | 2,110 L☉ |
| Radius | 114 R☉ |
| Mass | 8.09 M☉ (estimated) |
| Right ascension (J2000) | 18h 43m 16.6s |
| Declination (J2000) | +39° 18′ 00″ |
| Space velocity (relative to the Sun) | 34.1 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 June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 525. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 27 million years.
The Sun seen from there
From a planet around HIP 91820, the Sun would look like a star of magnitude 13.15, in the direction where our sky has the constellation Puppis. 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.