Star · K0III
25 Aqr
25 Aqr is a giant star of spectral type K0III in the constellation Aquarius, 246.8 light-years from the Sun.
| Other names | HIP 106944 |
|---|---|
| Constellation | Aquarius |
| Distance | 246.8 light-years (75.7 pc) |
| Apparent magnitude | magnitude 5.10 |
| Absolute magnitude | magnitude 0.71 |
| Spectral type | K0III |
| Surface temperature | 4,660 K |
| Luminosity | 73.4 L☉ |
| Radius | 13.1 R☉ |
| Mass | 3.1 M☉ (estimated) |
| Right ascension (J2000) | 21h 39m 33.3s |
| Declination (J2000) | +2° 14′ 37″ |
| Space velocity (relative to the Sun) | 47.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.10). Visible from the whole Northern Hemisphere and south to latitude 88° 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 1779. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.4 million years.
The Sun seen from there
From a planet around 25 Aqr, the Sun would look like a star of magnitude 9.22, 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 106505 16.0 light-years
- HIP 106601 16.9 light-years
- HIP 107342 18.5 light-years
- ULAS J213352.64-010343.4 19.2 light-years
- HIP 105888 19.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.