91 Aqr planetary system
91 Aqr is an orange main-sequence star of spectral type K0 III approximately 144 light-years from Earth (44.03 parsecs). It hosts 1 confirmed exoplanet.
Host star
- Name
- 91 Aqr
- Spectral type
- K0 III
- Effective temperature
- 4,665 K
- Mass
- 1.40 M☉ (solar masses)
- Radius
- 11.00 R☉ (solar radii)
- Distance
- 44.03 pc (144 ly)
- Hipparcos catalog
- HIP 114855
Confirmed planets (1)
| Planet | Class | Mass (M⊕) | Radius (R⊕) | Period (d) | Distance (AU) | Eq. temp (K) | Discovered |
|---|---|---|---|---|---|---|---|
| 91 Aqr b | Neptune-like | 1017.00 | 13.10 | 181.40 | 0.7000 | — | 2013 |
The planets in detail
91 Aqr b is a Neptune-like world with about 13.10 Earth radii and 1017.00 Earth masses. It orbits 91 Aqr at 0.7000 AU with a 181-day year, and no published equilibrium temperature. It was confirmed in 2013 via radial velocity (Doppler) measurements.
Discovery
The single planet in the 91 Aqr system was confirmed in 2013 using radial velocity (Doppler) measurements. Detection facilities: Lick Observatory.
Observing from Earth
Exoplanets cannot be resolved visually with amateur telescopes — the host star's glare is overwhelming and even space-based direct imaging requires sophisticated coronagraphs. What you can observe is the host star itself at right ascension 348.9745°, declination -9.0878°. Use the 3D orrery above to inspect orbital geometry, planetary scale, and the habitable-zone overlay — the orbits are computed from the published Keplerian elements and animate at user-controlled time rates.
