Temperature
5721 K
5662.2 to 5721
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Stellar HostProfile
HD 171028
Unclassified star • 111.7 pc
Records
8
literature rows
Planets
1
system count
References
9
distinct source labels
HD: HD 171028TIC: TIC 321030607
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: Jofré et al. 2015 • System source: TICv8
Mass
1 Msun
0.99 to 1.53
Radius
1.88 Rsun
1.88 to 2.54
Age
8.59 Gyr
8.50 to 8.59
Luminosity
0.57 log(Lsun)
0.57 to 0.78
Distance
111.7 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.88 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 171028
1.88 R☉
System Layout
Known planets
1 planets linked to this host
HD 171028 b
Radial Velocity
◌
Discovery
2007
Period
550 days
Radius
—
Mass
832.7 M⊕
Eq. Temp
—
HD 171028 and Its Lone Known Planet
HD 171028 is a G0 star 364 light-years away with one known planet. Its age is 8.59 billion years, its mass is 1 solar masses, its radius is 1.88 solar radii, and its temperature is 5720 K. That radius is larger than the Sun's, and the star is cooler than the Sun.
The planet is HD 171028 b, found by the radial velocity method in 2007. Its minimum mass, a lower bound on its true mass, is 833 Earth masses, and its orbital period is 550 days. That minimum mass is larger than Earth's and roughly 2.62 times Jupiter's mass.
Provenance
Underlying measurements and references
Evidence Summary
Rows
8
Stellar refs
8
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5671 | 1.53 | 2.47 | — | — | — | 111.7 | Stassun et al. 2017 | TICv8 |
| 5675.9 | 1.01 | 2.54 | — | 0.78 | — | 111.7 | TICv8 | TICv8 |
| — | — | — | — | — | — | 111.7 | Santos et al. 2011 | TICv8 |
| 5671 | 1.01 | — | — | — | — | 111.7 | Mortier et al. 2013 | TICv8 |
| 5663 | 0.99 | 1.95 | 8.50 | — | G0 | 111.7 | Santos et al. 2007 | TICv8 |
| 5721 | 1 | 1.88 | 8.59 | 0.57 | — | 111.7 | Jofré et al. 2015 | TICv8 |
| 5662.2 | — | 2.42 | — | 0.73 | — | 111.7 | Gaia DR2 | TICv8 |
| — | — | — | — | — | G0 | 111.7 | AGK 3 Catalog | TICv8 |