Star · K5III
HIP 81304
HIP 81304 is a giant star of spectral type K5III in the constellation Scorpius, 315.3 light-years from the Sun.
| Constellation | Scorpius |
|---|---|
| Distance | 315.3 light-years (96.7 pc) |
| Apparent magnitude | magnitude 4.18 |
| Absolute magnitude | magnitude −0.75 |
| Spectral type | K5III |
| Surface temperature | 3,740 K |
| Luminosity | 672 L☉ |
| Radius | 61.7 R☉ |
| Mass | 5.83 M☉ (estimated) |
| Right ascension (J2000) | 16h 36m 22.5s |
| Declination (J2000) | −35° 15′ 19″ |
| Space velocity (relative to the Sun) | 8.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.18). Visible from the whole Southern Hemisphere and north to latitude 55° N. South of latitude 55° 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 1711. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.6 million years.
The Sun seen from there
From a planet around HIP 81304, the Sun would look like a star of magnitude 9.76, 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 80511 11.8 light-years
- HIP 81803 14.5 light-years
- HIP 81853 15.1 light-years
- HIP 80603 17.8 light-years
- HIP 81682 19.1 light-years
- HIP 80770 19.3 light-years
- HIP 80220 19.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.