Temperature
5560 K
5555.0 to 5602.7
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Stellar HostProfile
HD 29021
G5 • 30.99 pc
Records
6
literature rows
Planets
1
system count
References
7
distinct source labels
HD: HD 29021TIC: TIC 458350670HIP: HIP 21571
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: Rey et al. 2017 • System source: TICv8
Mass
0.85 Msun
0.85 to 0.98
Radius
0.85 Rsun
0.85 to 0.89
Age
7.40 Gyr
5.50 to 7.40
Distance
30.99 pc
single adopted value
Spectral Type
G5
Consistent across records
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 29021
0.85 R☉
System Layout
Known planets
1 planets linked to this host
HD 29021 b
Radial Velocity
◌
Discovery
2017
Period
1365 days
Radius
—
Mass
1420.7 M⊕
Eq. Temp
—
HD 29021 and Its Giant Planet
HD 29021 is a G5 star 101 light-years away, with an age of 7.4 billion years. Its reported mass and radius estimates are each 0.85 solar masses and 0.85 solar radii, both smaller than the Sun's, and its temperature of 5560 K is cooler than the Sun's.
One planet orbits this host. HD 29021 b was discovered in 2017 by the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. The planet's mass estimate is 1420 Earth masses, larger than Earth's and roughly 4.47 times Jupiter's mass. It completes one orbit every 1370 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Stellar refs
6
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 |
|---|---|---|---|---|---|---|---|---|
| — | 0.86 | — | 5.50 | -0.18 | G5 | 30.99 | Li et al. 2021 | TICv8 |
| 5560 | 0.85 | 0.85 | 7.40 | — | G5 | 30.99 | Rey et al. 2017 | TICv8 |
| — | — | — | — | — | G5 | 30.99 | Cannon & Pickering 1918 | TICv8 |
| — | — | — | — | — | — | 30.99 | Nordstrom et al. 2004 | TICv8 |
| 5602.7 | — | 0.87 | — | -0.17 | — | 30.99 | Gaia DR2 | TICv8 |
| 5555.0 | 0.98 | 0.89 | — | -0.17 | — | 30.99 | TICv8 | TICv8 |