Star · K4III
99 Aqr
99 Aqr is a giant star of spectral type K4III in the constellation Aquarius, 308.1 light-years from the Sun.
| Other names | HIP 115669 |
|---|---|
| Constellation | Aquarius |
| Distance | 308.1 light-years (94.5 pc) |
| Apparent magnitude | magnitude 4.38 |
| Absolute magnitude | magnitude −0.50 |
| Spectral type | K4III |
| Surface temperature | 3,850 K |
| Luminosity | 459 L☉ |
| Radius | 48 R☉ |
| Mass | 5.23 M☉ (estimated) |
| Right ascension (J2000) | 23h 26m 02.8s |
| Declination (J2000) | −20° 38′ 31″ |
| Space velocity (relative to the Sun) | 40.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.38). Visible from the whole Southern Hemisphere and north to latitude 69° N. South of latitude 69° S it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1718. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.5 million years.
The Sun seen from there
From a planet around 99 Aqr, the Sun would look like a star of magnitude 9.71, in the direction where our sky has the constellation Leo. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HD 221416 10.4 light-years
- HIP 116028 12.3 light-years
- HIP 115924 12.9 light-years
- HIP 116533 15.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.