Temperature
5577 K
5556 to 5599
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Stellar HostProfile
HD 9174
G8 IV • 81.49 pc
Records
5
literature rows
Planets
1
system count
References
6
distinct source labels
TIC: TIC 439501096HD: HD 9174HIP: HIP 6993
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: Jenkins et al. 2017 • System source: TICv8
Mass
1.03 Msun
0.99 to 1.03
Radius
1.67 Rsun
1.67 to 1.73
Age
9 Gyr
single adopted value
Luminosity
0.38 log(Lsun)
0.38 to 0.41
Distance
81.49 pc
single adopted value
Spectral Type
G8 IV
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.67 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 9174
1.67 R☉
System Layout
Known planets
1 planets linked to this host
HD 9174 b
Radial Velocity
◌
Discovery
2016
Period
1179 days
Radius
—
Mass
352.8 M⊕
Eq. Temp
—
HD 9174 and Its Planet
HD 9174 is a star 266 light-years away with a spectral type of G8 IV. It has an age of 9 billion years, a mass of 1.03 solar masses, a radius of 1.67 solar radii, and a temperature of 5580 K. Its reported radius estimate is larger than the Sun's, and its reported temperature is cooler than the Sun's. One planet orbits this host.
That planet, HD 9174 b, was discovered in 2016 by the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. HD 9174 b has a minimum mass of 353 Earth masses, a lower bound on its true mass, and an orbital period of 1180 days. Its minimum mass is larger than Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
5
Stellar refs
5
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5556 | — | 1.73 | — | 0.41 | — | 81.49 | Gaia DR2 | TICv8 |
| 5599 | 0.99 | 1.70 | — | 0.41 | — | 81.49 | TICv8 | TICv8 |
| — | — | — | — | — | G5 | 81.49 | Cannon & Pickering 1918 | TICv8 |
| 5577 | 1.03 | 1.67 | 9 | 0.38 | G8 IV | 81.49 | Jenkins et al. 2017 | TICv8 |
| — | — | — | — | — | G8 IV | 81.49 | Michigan Catalog, Vol. 4 | TICv8 |