Temperature
4846 K
4677 to 4961
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Stellar HostProfile
HD 27442
K1/2III • 18.27 pc
Records
15
literature rows
Planets
1
system count
References
16
distinct source labels
HD: HD 27442HIP: HIP 19921TIC: TIC 198079199
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: Turnbull 2015 • System source: TICv8
Mass
1.48 Msun
0.83 to 1.48
Radius
3.43 Rsun
3.18 to 4.06
Age
2.84 Gyr
2.84 to 10
Luminosity
0.84 log(Lsun)
0.79 to 0.85
Distance
18.27 pc
single adopted value
Spectral Type
K1/2III
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 3.43 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 27442
3.43 R☉
System Layout
Known planets
1 planets linked to this host
HD 27442 b
Radial Velocity
◌
Discovery
2000
Period
428.1 days
Radius
—
Mass
495.8 M⊕
Eq. Temp
—
HD 27442 and Its Planet
HD 27442 is a K1/2III star 59.6 light-years away with one known planet. Its spectral type places it in the K class, cooler than the Sun. The star's reported mass estimate is 1.48 solar masses, larger than the Sun's, and its reported radius estimate is 3.43 solar radii, also larger than the Sun's. Its reported temperature is 4850 K, cooler than the Sun's, and its age is 2.84 billion years.
The planet HD 27442 b was found in 2000 using the radial velocity method. That method tracks the wobble a planet's gravity induces in its star's motion, and repeated wobbles reveal the planet and its orbital period. HD 27442 b's minimum mass is 496 Earth masses, a lower bound on its true mass, and its minimum mass is larger than Earth's and roughly 1.56 times Jupiter's mass. The planet completes one orbit every 428 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
15
Stellar refs
15
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 |
|---|---|---|---|---|---|---|---|---|
| 4677 | — | 4.06 | — | 0.85 | — | 18.27 | Gaia DR2 | TICv8 |
| — | — | — | — | — | K2 III | 18.27 | Gray et al. 2006 | TICv8 |
| 4846 | 1.48 | 3.43 | 2.84 | 0.84 | K1/2III | 18.27 | Turnbull 2015 | TICv8 |
| — | — | — | — | — | — | 18.27 | Reiners & Schmitt 2003a | TICv8 |
| 4846 | 1.23 | — | — | — | — | 18.27 | Butler et al. 2006 | TICv8 |
| 4890 | 0.83 | — | — | — | — | 18.27 | Santos et al. 2003 | TICv8 |
| — | — | — | — | — | K1/2 III | 18.27 | Michigan Catalog, Vol. 1 | TICv8 |
| — | 1.20 | — | 10 | — | — | 18.27 | Butler et al. 2001 | TICv8 |
| — | — | — | — | — | K2 | 18.27 | Cannon & Pickering 1918 | TICv8 |
| — | — | — | — | — | — | 18.27 | Valenti & Fischer 2005 | TICv8 |
| 4850.7 | — | 3.54 | — | — | — | 18.27 | TICv8 | TICv8 |
| 4961 | 1.46 | 3.18 | 2.89 | 0.79 | — | 18.27 | Jofré et al. 2015 | TICv8 |
| 4781 | 1.24 | — | — | — | — | 18.27 | Mortier et al. 2013 | TICv8 |
| 4852 | — | — | — | — | — | 18.27 | Tsantaki et al. 2014 | TICv8 |
| 4825 | — | — | — | — | — | 18.27 | Santos et al. 2004 | TICv8 |