Temperature
5781 K
5736 to 5864
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Stellar HostProfile
HD 181720
G1 V • 60.20 pc
Records
9
literature rows
Planets
1
system count
References
10
distinct source labels
TIC: TIC 112243062HIP: HIP 95262HD: HD 181720
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: Santos et al. 2010 • System source: TICv8
Mass
0.92 Msun
0.92 to 1.04
Radius
1.39 Rsun
1.39 to 1.51
Luminosity
0.29 log(Lsun)
0.29 to 0.36
Distance
60.20 pc
single adopted value
Spectral Type
G1 V
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.39 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 181720
1.39 R☉
System Layout
Known planets
1 planets linked to this host
HD 181720 b
Radial Velocity
◌
Discovery
2009
Period
956 days
Radius
—
Mass
127.1 M⊕
Eq. Temp
—
HD 181720 and Its Lone Known Planet
HD 181720 is a G-type dwarf star 196 light-years away, with a reported mass of 0.92 solar masses, a radius of 1.39 solar radii, and a temperature of 5780 K. Both its mass and radius are compared with the Sun's: the mass estimate is smaller, while the radius estimate is larger. One planet has been found orbiting this host.
That planet, HD 181720 b, was discovered in 2009 by the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. Its minimum mass is 127 Earth masses, a lower bound larger than Earth's, and it completes one orbit every 956 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
9
Stellar refs
9
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5864 | — | 1.47 | — | 0.36 | — | 60.20 | Gaia DR2 | TICv8 |
| 5784.6 | 1.04 | 1.51 | — | 0.36 | — | 60.20 | TICv8 | TICv8 |
| — | — | — | — | — | — | 60.20 | Wright et al. 2004 | TICv8 |
| 5736 | 1.03 | 1.50 | — | — | — | 60.20 | Stassun et al. 2017 | TICv8 |
| — | — | — | — | — | — | 60.20 | Nordstrom et al. 2004 | TICv8 |
| — | — | — | — | — | — | 60.20 | Henry et al. 1996 | TICv8 |
| — | — | — | — | — | G1 V | 60.20 | Michigan Catalog, Vol. 3 | TICv8 |
| — | — | — | — | — | G0 | 60.20 | Cannon & Pickering 1918 | TICv8 |
| 5781 | 0.92 | 1.39 | — | 0.29 | G1 V | 60.20 | Santos et al. 2010 | TICv8 |