Temperature
5311 K
5226 to 5327
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Stellar HostProfile
HD 99109
Unclassified star • 54.79 pc
Records
13
literature rows
Planets
1
system count
References
14
distinct source labels
TIC: TIC 38158652HIP: HIP 55664HD: HD 99109
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: Ghezzi et al. 2010 • System source: TICv8
Mass
1 Msun
0.76 to 1
Radius
0.85 Rsun
0.85 to 1.00
Age
1 Gyr
1 to 12.20
Luminosity
-0.29 log(Lsun)
-0.29 to -0.17
Distance
54.79 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.85 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 99109
0.85 R☉
System Layout
Known planets
1 planets linked to this host
HD 99109 b
Radial Velocity
◌
Discovery
2005
Period
439.3 days
Radius
—
Mass
139.8 M⊕
Eq. Temp
—
HD 99109 and Its Lone Known Planet
HD 99109 is a K0 star located 179 light-years away. One planet has been found in orbit around it, discovered in 2005 by the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. The host star has a mass of 1 solar mass and a radius of 0.85 solar radii, smaller than the Sun's, with a temperature of 5310 K that is cooler than the Sun's. Its age is reported as an upper limit of 1 billion years.
The planet, HD 99109 b, has a minimum mass of 140 Earth masses, a lower bound on its true mass and larger than Earth's, and it completes one orbit every 439 days. That single planet is the entirety of what is known to circle this star.
Provenance
Underlying measurements and references
Evidence Summary
Rows
13
Stellar refs
13
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | K0 | 54.79 | Cannon & Pickering 1918 | TICv8 |
| — | — | — | — | — | — | 54.79 | Nidever et al. 2002 | TICv8 |
| — | — | — | — | — | — | 54.79 | Wright et al. 2004 | TICv8 |
| 5272 | 0.93 | — | — | — | — | 54.79 | Butler et al. 2006 | TICv8 |
| 5311 | 1 | 0.85 | 1 | -0.29 | — | 54.79 | Ghezzi et al. 2010 | TICv8 |
| 5323.9 | 0.97 | 0.99 | — | — | — | 54.79 | Rosenthal et al. 2021 | TICv8 |
| 5251 | 0.90 | 0.99 | — | -0.17 | — | 54.79 | TICv8 | TICv8 |
| — | 0.94 | 0.93 | 12.20 | — | — | 54.79 | Takeda et al. 2007 | TICv8 |
| — | — | — | — | — | — | 54.79 | Valenti & Fischer 2005 | TICv8 |
| 5226 | — | 1.00 | — | -0.17 | — | 54.79 | Gaia DR2 | TICv8 |
| 5327 | 0.93 | — | — | — | — | 54.79 | Santos et al. 2013 | TICv8 |
| — | — | — | — | — | G8/K0 IV | 54.79 | Michigan Catalog, Vol. 5 | TICv8 |
| 5282 | 0.76 | 0.98 | — | — | — | 54.79 | Stassun et al. 2017 | TICv8 |