Temperature
5615 K
5615 to 5773
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Stellar HostProfile
HD 66428
Unclassified star • 53.28 pc
Records
19
literature rows
Planets
2
system count
References
19
distinct source labels
TIC: TIC 73238215HD: HD 66428HIP: HIP 39417
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
1 to 1.15
Radius
1.15 Rsun
1.05 to 1.17
Age
8 Gyr
3.52 to 8
Luminosity
0.07 log(Lsun)
0.07 to 0.11
Distance
53.28 pc
single adopted value
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.15 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 66428
1.15 R☉
System Layout
Known planets
2 planets linked to this host
HD 66428 b
Radial Velocity
◌
Discovery
2005
Period
2269.8 days
Radius
—
Mass
3478.9 M⊕
Eq. Temp
—
HD 66428 c
Radial Velocity
◌
Discovery
2021
Period
1.05e4 days
Radius
—
Mass
560.6 M⊕
Eq. Temp
—
HD 66428 and Its Two Known Planets
HD 66428 is a G-type star 174 light-years away. Its spectral type is G5, and its reported mass is 1 solar mass. Its radius is 1.15 solar radii, which is larger than the Sun's, and its temperature is 5620 K, which is cooler than the Sun's. The star is 8 billion years old.
Two planets are known to orbit this star. HD 66428 b was discovered in 2005 by the radial velocity method. Its mass estimate is 3480 Earth masses, and among the listed planets it has the largest reported mass and the shortest year, an orbital period of 2270 days. HD 66428 c was discovered in 2021, also by the radial velocity method. Its mass estimate is 561 Earth masses, and among the listed planets it has the smallest reported mass and the longest year, an orbital period of 10500 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
19
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 |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | — | 53.28 | Nidever et al. 2002 | TICv8 |
| 5716 | 1 | 1.13 | — | — | — | 53.28 | Stassun et al. 2017 | TICv8 |
| — | 1.06 | — | — | — | — | 53.28 | Bryan et al. 2016 | TICv8 |
| — | — | — | — | — | G5 | 53.28 | Cannon & Pickering 1918 | TICv8 |
| 5689 | — | 1.15 | — | 0.10 | — | 53.28 | Gaia DR2 | TICv8 |
| — | 1.06 | 1.05 | 5.56 | — | — | 53.28 | Takeda et al. 2007 | TICv8 |
| — | — | — | — | — | G8 IV (+ G) | 53.28 | Michigan Catalog, Vol. 5 | TICv8 |
| 5647.6 | 1.05 | 1.17 | — | — | — | 53.28 | Rosenthal et al. 2021 | TICv8 |
| — | — | — | — | — | — | 53.28 | Wright et al. 2004 | TICv8 |
| 5615 | 1 | 1.15 | 8 | 0.07 | — | 53.28 | Ghezzi et al. 2010 | TICv8 |
| 5773 | 1.08 | 1.10 | 3.52 | — | — | 53.28 | Barbato et al. 2018 | TICv8 |
| — | — | — | — | — | G8 IV (+ G) | 53.28 | Michigan Catalog, Vol. 5 | TICv8 |
| 5752 | 1.10 | — | — | — | — | 53.28 | Butler et al. 2006 | TICv8 |
| 5705 | 1.01 | — | — | 0.11 | — | 53.28 | Sousa et al. 2008 | TICv8 |
| — | 1.01 | — | — | — | — | 53.28 | Feng et al. 2022 | TICv8 |
| 5669 | 1.01 | 1.16 | — | 0.10 | — | 53.28 | TICv8 | TICv8 |
| — | 1.15 | — | — | — | — | 53.28 | An et al. 2025 | TICv8 |
| — | — | — | — | — | — | 53.28 | Valenti & Fischer 2005 | TICv8 |
| — | — | — | — | — | — | 53.28 | Nordstrom et al. 2004 | TICv8 |