Star · K3III
HIP 81823
HIP 81823 is a giant star of spectral type K3III in the constellation Triangulum Australe, 1,833 light-years from the Sun.
| Constellation | Triangulum Australe |
|---|---|
| Distance | 1,833 light-years (561.9 pc) |
| Apparent magnitude | magnitude 6.23 |
| Absolute magnitude | magnitude −2.52 |
| Spectral type | K3III |
| Surface temperature | 3,760 K |
| Luminosity | 3,360 L☉ |
| Radius | 137 R☉ |
| Mass | 9.24 M☉ (estimated) |
| Right ascension (J2000) | 16h 42m 48.4s |
| Declination (J2000) | −62° 33′ 14″ |
| Space velocity (relative to the Sun) | 36.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.23). Visible from the whole Southern Hemisphere and north to latitude 27° N. South of latitude 27° S it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 193. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 33 million years.
The Sun seen from there
From a planet around HIP 81823, the Sun would look like a star of magnitude 13.58, in the direction where our sky has the constellation Camelopardalis. 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.