Temperature
4955 K
4740 to 5619
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Stellar HostProfile
HD 99492
K2/4 • 18.20 pc
Records
18
literature rows
Planets
2
system count
References
19
distinct source labels
TIC: TIC 363549734HD: HD 99492HIP: HIP 55848
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: Turnbull 2015 • System source: TICv8
Mass
0.83 Msun
0.48 to 0.86
Radius
0.76 Rsun
0.75 to 0.96
Age
8.60 Gyr
1.80 to 13
Luminosity
-0.47 log(Lsun)
-0.47 to -0.38
Distance
18.20 pc
single adopted value
Spectral Type
K2/4
Multiple classifications reported
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.76 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 99492
0.76 R☉
System Layout
Known planets
2 planets linked to this host
HD 99492 b
Radial Velocity
◌
Discovery
2004
Period
17.05 days
Radius
—
Mass
25.50 M⊕
Eq. Temp
—
HD 99492 c
Radial Velocity
◌
Discovery
2023
Period
95.23 days
Radius
—
Mass
17.90 M⊕
Eq. Temp
—
HD 99492 and Its Two Known Planets
HD 99492 is a K-type star 59.4 light-years away, with a spectral type of K2/4. Its measured mass is 0.83 solar masses and its radius is 0.76 solar radii, both smaller than the Sun's corresponding values. The star is cooler than the Sun at a temperature of 4960 K, and its age is 8.6 billion years. Two planets have been found orbiting this host.
Both planets were discovered using the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion. HD 99492 b was discovered in 2004, and HD 99492 c in 2023. Each has a minimum mass, meaning a lower bound on its true mass. HD 99492 b's minimum mass is 25.5 Earth masses, and HD 99492 c's is 17.9 Earth masses; both are larger than Earth's mass. Among the listed planets, HD 99492 b has the largest minimum mass and HD 99492 c the smallest, while HD 99492 b also has the shortest year at 17.1 days and HD 99492 c the longest at 95.2 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
18
Stellar refs
18
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 |
|---|---|---|---|---|---|---|---|---|
| — | — | — | 13 | — | — | 18.20 | Sanz-Forcada et al. 2010 | TICv8 |
| 4800.5 | — | 0.86 | — | -0.45 | — | 18.20 | Gaia DR2 | TICv8 |
| 4936.5 | 0.86 | 0.82 | — | — | — | 18.20 | Rosenthal et al. 2021 | TICv8 |
| 4954 | 0.78 | — | 3.98 | — | K2 V | 18.20 | Marcy et al. 2005 | TICv8 |
| 4815 | 0.48 | 0.83 | — | — | — | 18.20 | Stassun et al. 2017 | TICv8 |
| 5069.6 | 0.85 | 0.75 | — | -0.47 | — | 18.20 | TICv8 | TICv8 |
| — | — | — | — | — | K0 | 18.20 | Cannon & Pickering 1918 | TICv8 |
| — | — | — | — | — | — | 18.20 | Nidever et al. 2002 | TICv8 |
| 4929 | 0.85 | — | — | — | K2 V | 18.20 | Stalport et al. 2023 | TICv8 |
| 4929 | 0.85 | 0.78 | 4.80 | — | — | 18.20 | Kane et al. 2016 | TICv8 |
| — | — | — | — | — | — | 18.20 | Wright et al. 2004 | TICv8 |
| — | — | — | — | — | — | 18.20 | Valenti & Fischer 2005 | TICv8 |
| 5619 | — | — | — | — | — | 18.20 | Maldonado et al. 2015 | TICv8 |
| 4740 | 0.83 | 0.96 | 4 | -0.38 | — | 18.20 | Meschiari et al. 2011 | TICv8 |
| 4955 | 0.83 | 0.76 | 8.60 | -0.47 | K2/4 | 18.20 | Turnbull 2015 | TICv8 |
| — | — | — | — | — | — | 18.20 | Nordstrom et al. 2004 | TICv8 |
| — | — | — | — | — | K2/4 | 18.20 | Michigan Catalog, Vol. 5 | TICv8 |
| — | 0.83 | 0.76 | 1.80 | — | — | 18.20 | Takeda et al. 2007 | TICv8 |