Star · K0 III
91 Aqr
91 Aqr is a giant star of spectral type K0 III in the constellation Aquarius, 147.6 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | ψ¹ Aqr · Gl 893.2A · HIP 114855 |
|---|---|
| Constellation | Aquarius |
| Distance | 147.6 light-years (45.3 pc) |
| Apparent magnitude | magnitude 4.24 |
| Absolute magnitude | magnitude 0.96 |
| Spectral type | K0 III |
| Surface temperature | 4,670 K |
| Luminosity | 49.2 L☉ |
| Radius | 11 R☉ |
| Mass | 1.4 M☉ |
| Age | 3.6 billion years |
| Metallicity [Fe/H] | -0.03 |
| Right ascension (J2000) | 23h 15m 53.5s |
| Declination (J2000) | −9° 05′ 16″ |
| Space velocity (relative to the Sun) | 83.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.24). Visible from the whole Southern Hemisphere and north to latitude 81° N. 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 1878. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.6 million years.
The Sun seen from there
From a planet around 91 Aqr, the Sun would look like a star of magnitude 8.11, in the direction where our sky has the constellation Leo. It would be invisible to the naked eye.
Planets
- 91 Aqr b 181-day orbit · 13.1 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 893.2C 0.03 light-years
- Gl 893.2B 0.04 light-years
- HIP 114952 11.5 light-years
- HIP 114007 13.6 light-years
- HIP 115953 14.7 light-years
- HIP 115220 14.7 light-years
- HIP 114702 14.8 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.