Star · A1IV
HIP 105819
HIP 105819 is a subgiant star of spectral type A1IV in the constellation Aquarius, 233.2 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 233.2 light-years (71.5 pc) |
| Apparent magnitude | magnitude 6.45 |
| Absolute magnitude | magnitude 2.18 |
| Spectral type | A1IV |
| Surface temperature | 8,470 K |
| Luminosity | 12.8 L☉ |
| Radius | 1.66 R☉ |
| Mass | 1.89 M☉ (estimated) |
| Right ascension (J2000) | 21h 25m 51.6s |
| Declination (J2000) | +0° 32′ 04″ |
| Space velocity (relative to the Sun) | 20.5 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 89° S. 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 the year 1793. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.1 million years.
The Sun seen from there
From a planet around HIP 105819, the Sun would look like a star of magnitude 9.10, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 105899 13.4 light-years
- HIP 104735 16.2 light-years
- HIP 105661 16.5 light-years
- HIP 104390 18.4 light-years
- HIP 105521 19.2 light-years
- HIP 105399 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.