Temperature
5021 K
4940 to 5048
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Stellar HostProfile
HD 18742
Unclassified star • 162.7 pc
Records
9
literature rows
Planets
1
system count
References
10
distinct source labels
HD: HD 18742TIC: TIC 71345433HIP: HIP 13993
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
1.48 Msun
1.36 to 2.58
Radius
4.08 Rsun
4.08 to 6.34
Age
2.49 Gyr
2.30 to 2.49
Luminosity
1.12 log(Lsun)
1.12 to 1.32
Distance
162.7 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 4.08 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 18742
4.08 R☉
System Layout
Known planets
1 planets linked to this host
HD 18742 b
Radial Velocity
◌
Discovery
2011
Period
766 days
Radius
—
Mass
1080.6 M⊕
Eq. Temp
—
HD 18742 and Its Planet
HD 18742 is a star 531 light-years away with a spectral type of G0. It has an age of 2.49 billion years, a mass of 1.48 solar masses, a radius of 4.08 solar radii, and a temperature of 5020 K. Its reported mass and radius estimates are larger than the Sun's, while its reported temperature is cooler than the Sun's. One planet orbits this host.
That planet, HD 18742 b, was discovered in 2011 by the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion. It has a minimum mass of 1080 Earth masses, a lower bound on its true mass that is larger than Earth's and roughly 3.4 times Jupiter's mass. Its orbital period is 766 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
9
Stellar refs
9
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 |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | G0 | 162.7 | Cannon & Pickering 1918 | TICv8 |
| 5048 | 1.60 | 4.90 | 2.30 | 1.14 | — | 162.7 | Johnson et al. 2011 | TICv8 |
| 5016 | 1.73 | — | — | — | — | 162.7 | Mortier et al. 2013 | TICv8 |
| 4940 | 1.36 | 5.13 | — | — | — | 162.7 | Luhn et al. 2019 | TICv8 |
| 5021 | 2.58 | 5.88 | — | — | — | 162.7 | Stassun et al. 2017 | TICv8 |
| 5047 | — | 5.94 | — | 1.32 | — | 162.7 | Gaia DR2 | TICv8 |
| 4940 | — | 6.34 | — | — | — | 162.7 | TICv8 | TICv8 |
| 5021 | 1.48 | 4.08 | 2.49 | 1.12 | — | 162.7 | Jofré et al. 2015 | TICv8 |
| — | — | — | — | — | G8/K0 IV | 162.7 | Michigan Catalog, Vol. 4 | TICv8 |