Star · G3III
HIP 81803
HIP 81803 is a giant star of spectral type G3III in the constellation Scorpius, 323.0 light-years from the Sun.
| Constellation | Scorpius |
|---|---|
| Distance | 323.0 light-years (99.0 pc) |
| Apparent magnitude | magnitude 6.47 |
| Absolute magnitude | magnitude 1.49 |
| Spectral type | G3III |
| Surface temperature | 5,350 K |
| Luminosity | 26.1 L☉ |
| Radius | 5.94 R☉ |
| Mass | 2.31 M☉ (estimated) |
| Right ascension (J2000) | 16h 42m 29.1s |
| Declination (J2000) | −37° 04′ 46″ |
| Space velocity (relative to the Sun) | 44.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.47). Visible from the whole Southern Hemisphere and north to latitude 53° N. South of latitude 53° 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 1703. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.7 million years.
The Sun seen from there
From a planet around HIP 81803, the Sun would look like a star of magnitude 9.81, in the direction where our sky has the constellation Perseus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 81853 3.84 light-years
- HIP 81304 14.5 light-years
- HIP 80603 17.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.