Star · K5
Gl 864
Gl 864 is a supergiant star of spectral type K5 in the constellation Aquarius, 2,633 light-years from the Sun.
| Other names | HIP 111571 |
|---|---|
| Constellation | Aquarius |
| Distance | 2,633 light-years (807.4 pc) |
| Apparent magnitude | magnitude 9.98 |
| Absolute magnitude | magnitude 0.44 |
| Spectral type | K5 |
| Surface temperature | 3,930 K |
| Luminosity | 176 L☉ |
| Radius | 28.5 R☉ |
| Mass | 3.98 M☉ (estimated) |
| Right ascension (J2000) | 22h 36m 09.7s |
| Declination (J2000) | −0° 50′ 30″ |
| Space velocity (relative to the Sun) | 71.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.98. Visible from the whole Southern Hemisphere and north to latitude 89° N. 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 608 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 47 million years.
The Sun seen from there
From a planet around Gl 864, the Sun would look like a star of magnitude 14.37, in the direction where our sky has the constellation Sextans. 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.