Temperature
5527 K
5493.5 to 5586
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Stellar HostProfile
HD 219666
G5 V • 94.17 pc
Records
6
literature rows
Planets
1
system count
References
7
distinct source labels
HD: HD 219666TIC: TIC 266980320
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: Oddo et al. 2023 • System source: TICv8
Mass
0.92 Msun
0.92 to 1.02
Radius
1.03 Rsun
1.03 to 1.07
Age
10 Gyr
single adopted value
Distance
94.17 pc
single adopted value
Spectral Type
G5 V
Consistent across records
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.03 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 219666
1.03 R☉
System Layout
Known planets
1 planets linked to this host
HD 219666 b
Transit
◌
Discovery
2018
Period
6.03 days
Radius
4.90 R⊕
Mass
17.60 M⊕
Eq. Temp
1076 K
HD 219666 and Its Lone Planet
HD 219666 is a star 307 light-years away with a single known planet in orbit around it. The host is a G-type main-sequence dwarf with a spectral type of G5 V. Its reported age is 10 billion years, its mass is 0.92 solar masses, its radius is 1.03 solar radii, and its temperature is 5530 K. The star's reported mass estimate is smaller than the Sun's, and its reported temperature is cooler than the Sun's.
The one planet is HD 219666 b, a Jupiter-like world discovered by transit in 2018. Its radius is 4.9 Earth radii, larger than Earth's, which places it above the Jupiter-like threshold. Its mass is 17.6 Earth masses, also larger than Earth's. Its mean density is 0.825 g/cm³, 0.15 times Earth's. The planet completes an orbit in 6.03 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Stellar refs
6
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitystable
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5527 | 0.92 | 1.03 | 10 | — | G5 V | 94.17 | Oddo et al. 2023 | TICv8 |
| 5527 | 0.92 | 1.03 | 10 | — | — | 94.17 | Esposito et al. 2019 | TICv8 |
| 5493.5 | — | 1.07 | — | -0.03 | — | 94.17 | Gaia DR2 | TICv8 |
| 5540 | 1.02 | 1.06 | — | — | — | 94.17 | Murphy et al. 2025 | TICv8 |
| 5527 | 0.97 | 1.05 | — | -0.03 | — | 94.17 | TICv8 | TICv8 |
| 5586 | — | 1.05 | — | — | — | 94.17 | ExoFOP | TICv8 |