Temperature
4663 K
4663 to 4806.8
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Stellar HostProfile
HD 164604
K3.5 V • 39.36 pc
Records
10
literature rows
Planets
2
system count
References
11
distinct source labels
TIC: TIC 406317882HIP: HIP 88414HD: HD 164604
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: Xiao et al. 2026 • System source: TICv8
Mass
0.77 Msun
0.77 to 0.80
Radius
0.78 Rsun
0.72 to 0.78
Age
1.60 Gyr
single adopted value
Luminosity
-0.59 log(Lsun)
-0.61 to -0.59
Distance
39.36 pc
single adopted value
Spectral Type
K3.5 V
Multiple classifications reported
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.78 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 164604
0.78 R☉
System Layout
Known planets
2 planets linked to this host
HD 164604 b
Radial Velocity
◌
Discovery
2009
Period
653.9 days
Radius
—
Mass
4195.3 M⊕
Eq. Temp
—
HD 164604 c
Radial Velocity
◌
Discovery
2026
Period
5387 days
Radius
—
Mass
3019.4 M⊕
Eq. Temp
—
HD 164604 and Its Two Known Planets
HD 164604 is a K3.5 V star located 128 light-years away. Its spectral type marks it as a main-sequence dwarf, and it is the only star in its system. The star is 1.6 billion years old and has a mass of 0.77 solar masses, a radius of 0.78 solar radii, and a temperature of 4660 K. Its reported mass and radius estimates are smaller than the Sun's, and its reported temperature is cooler than the Sun's. Two planets are known to orbit this host.
HD 164604 b was discovered in 2009 by the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. It has a mass of 4200 Earth masses and an orbital period of 654 days. Its reported mass estimate is larger than Earth's and roughly 13.2 times Jupiter's mass. Among the listed planets, it has the shortest year by reported estimates and the largest reported mass.
HD 164604 c was discovered in 2026, also by radial velocity. It has a mass of 3020 Earth masses and an orbital period of 5390 days. Its reported mass estimate is larger than Earth's and roughly 9.5 times Jupiter's mass. Among the listed planets, it has the longest year by reported estimates and the smallest reported mass.
Provenance
Underlying measurements and references
Evidence Summary
Rows
10
Stellar refs
10
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 |
|---|---|---|---|---|---|---|---|---|
| 4684 | 0.77 | — | — | — | — | 39.36 | Santos et al. 2013 | TICv8 |
| — | — | — | — | — | K3.5 V (k) | 39.36 | Gray et al. 2006 | TICv8 |
| 4806.8 | 0.78 | 0.72 | — | -0.61 | — | 39.36 | TICv8 | TICv8 |
| — | — | — | — | — | — | 39.36 | Nordstrom et al. 2004 | TICv8 |
| — | — | — | — | — | K0 | 39.36 | Cannon & Pickering 1918 | TICv8 |
| — | 0.80 | — | — | — | K2 V | 39.36 | Arriagada et al. 2010 | TICv8 |
| 4684 | 0.77 | — | — | — | K3.5 V | 39.36 | Feng et al. 2019 | TICv8 |
| — | — | — | — | — | K1/3 | 39.36 | Michigan Catalog, Vol. 3 | TICv8 |
| 4663 | 0.77 | 0.78 | 1.60 | -0.59 | K3.5 V | 39.36 | Xiao et al. 2026 | TICv8 |
| 4684 | — | 0.77 | — | -0.59 | — | 39.36 | Gaia DR2 | TICv8 |