Temperature
5847 K
5773.5 to 5847.4
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Stellar HostProfile
HD 221420
G2 IV-V • 31.14 pc
Records
14
literature rows
Planets
1
system count
References
15
distinct source labels
TIC: TIC 277890728HIP: HIP 116250HD: HD 221420
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: Venner et al. 2021 • System source: TICv8
Mass
1.35 Msun
1.06 to 1.67
Radius
1.95 Rsun
1.93 to 2.00
Age
3.65 Gyr
3.65 to 6.60
Luminosity
0.60 log(Lsun)
0.59 to 0.60
Distance
31.14 pc
single adopted value
Spectral Type
G2 IV-V
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.95 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 221420
1.95 R☉
System Layout
Known planets
1 planets linked to this host
HD 221420 b
Radial Velocity
◌
Discovery
2019
Period
10090 days
Radius
—
Mass
7278.3 M⊕
Eq. Temp
—
HD 221420 and Its Planet
HD 221420 is a G2 IV-V star 102 light-years away with one known planet. Its spectral type is G2 IV-V. The star is 3.65 billion years old, has a mass of 1.35 solar masses, a radius of 1.95 solar radii, and a temperature of 5850 K. Its mass and radius estimates are larger than the Sun's, and its temperature is hotter than the Sun's.
The planet HD 221420 b was discovered in 2019 by radial velocity, a method that detects the wobble a planet's gravity induces in its star's motion. The planet has a mass of 7280 Earth masses and an orbital period of 10100 days, completing one orbit in that time. Its mass estimate is larger than Earth's and roughly 22.9 times Jupiter's mass.
Provenance
Underlying measurements and references
Evidence Summary
Rows
14
Stellar refs
14
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 |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | — | 31.14 | Nordstrom et al. 2004 | TICv8 |
| — | — | — | — | — | — | 31.14 | Valenti & Fischer 2005 | TICv8 |
| — | 1.34 | — | 3.70 | — | G1 V | 31.14 | Philipot et al. 2023 | TICv8 |
| — | — | — | — | — | K0 | 31.14 | Cannon & Pickering 1918 | TICv8 |
| 5847 | 1.35 | 1.95 | 3.65 | 0.60 | G2 IV-V | 31.14 | Venner et al. 2021 | TICv8 |
| — | 1.28 | — | 6.60 | 0.59 | G2 V | 31.14 | Li et al. 2021 | TICv8 |
| — | — | — | — | — | — | 31.14 | Henry et al. 1996 | TICv8 |
| — | — | — | — | — | G2 IV-V | 31.14 | Gray et al. 2006 | TICv8 |
| 5830 | 1.67 | — | — | — | — | 31.14 | Kane et al. 2019 | TICv8 |
| — | — | — | — | — | G2 V | 31.14 | Michigan Catalog, Vol. 1 | TICv8 |
| — | 1.34 | — | — | — | — | 31.14 | An et al. 2025 | TICv8 |
| 5847.4 | 1.06 | 1.93 | — | 0.59 | — | 31.14 | TICv8 | TICv8 |
| — | 1.06 | — | — | — | — | 31.14 | Feng et al. 2022 | TICv8 |
| 5773.5 | — | 2.00 | — | 0.60 | — | 31.14 | Gaia DR2 | TICv8 |