Temperature
4665 K
4658.9 to 4700
←Back to Stellar Hosts
Stellar HostProfile
91 Aqr
K0 III • 44.03 pc
Records
7
literature rows
Planets
1
system count
References
8
distinct source labels
TIC: TIC 4610441HIP: HIP 114855HD: HD 219449
Approximate color
from effective temperature
Canonical Summary
Adopted host values from one source row
Values come from the row with the most populated summary measurements. Missing values stay missing. Ranges and counts describe all source rows.
Stellar source: Mitchell et al. 2013 • System source: TICv8
Mass
1.40 Msun
1.32 to 1.40
Radius
11 Rsun
10.39 to 11
Age
3.56 Gyr
single adopted value
Distance
44.03 pc
single adopted value
Spectral Type
K0 III
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 11 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
91 Aqr
11 R☉
System Layout
Known planets
1 planets linked to this host
91 Aqr b
Radial Velocity
◌
Discovery
2013
Period
181.4 days
Radius
—
Mass
1017 M⊕
Eq. Temp
—
91 Aqr: A K-Type Giant and Its Minimum-Mass Planet
The star 91 Aqr lies 144 light-years away and has a mass of 1.4 solar masses, a radius of 11 solar radii, a temperature of 4670 K, and an age of 3.56 billion years. Its spectral type, K0 III, marks it as a cool giant. One planet orbits this host: 91 Aqr b, discovered in 2013 by the radial velocity method, which detects the wobble a planet's gravity induces in its star. The planet's minimum mass, a lower bound on its true mass, is 1020 Earth masses, roughly 3.2 times Jupiter's mass. It completes one orbit in 181 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
7
Stellar refs
7
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositystable
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4658.9 | — | 10.39 | — | — | — | 44.03 | TICv8 | TICv8 |
| — | — | — | — | — | K0/1 III | 44.03 | Michigan Catalog, Vol. 5 | TICv8 |
| — | — | — | — | — | — | 44.03 | Duncan et al. 1991 | TICv8 |
| 4665 | 1.40 | 11 | 3.56 | — | K0 III | 44.03 | Mitchell et al. 2013 | TICv8 |
| 4681 | 1.32 | — | — | — | — | 44.03 | Mortier et al. 2013 | TICv8 |
| — | — | — | — | — | K0 | 44.03 | Cannon & Pickering 1918 | TICv8 |
| 4700 | — | 10.58 | — | 1.69 | — | 44.03 | Gaia DR2 | TICv8 |