Temperature
6432 K
6226 to 6526
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Stellar HostProfile
WASP-18
Unclassified star • 123.5 pc
Records
19
literature rows
Planets
1
system count
References
20
distinct source labels
TIC: TIC 100100827HIP: HIP 7562HD: HD 10069
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: Cortés-Zuleta et al. 2020 • System source: TICv8
Mass
1.29 Msun
1.20 to 1.46
Radius
1.32 Rsun
0.81 to 1.36
Age
1.57 Gyr
0.40 to 1.57
Luminosity
0.43 log(Lsun)
0.36 to 0.43
Distance
123.5 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.32 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
WASP-18
1.32 R☉
System Layout
Known planets
1 planets linked to this host
WASP-18 b
Transit
◌
Discovery
2009
Period
0.94 days
Radius
13.90 R⊕
Mass
3241.8 M⊕
Eq. Temp
2429 K
WASP-18: A Hot Star With a Closely Orbiting Giant
WASP-18 is a star system 403 light-years away. The host star is of spectral type F6 IV-V, and it has an age of 1.57 billion years, a mass of 1.29 solar masses, a radius of 1.32 solar radii, and a temperature of 6430 K. Its mass and radius are larger than the Sun's, and its temperature is hotter than the Sun's. One planet has been identified orbiting this star.
That planet is WASP-18 b, a Jupiter-like world discovered by the transit method in 2009. It has a mass of 3240 Earth masses, which is roughly 10.2 times Jupiter's mass and larger than Earth's mass. Its radius is 13.9 Earth radii, larger than Earth's radius, and its mean density is 6.65 g/cm³, 1.21 times Earth's. WASP-18 b completes an orbit in just 0.941 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
19
Stellar refs
19
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 |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | F8 | 123.5 | Cannon & Pickering 1918 | TICv8 |
| — | — | — | — | — | F6 IV/V | 123.5 | Michigan Catalog, Vol. 2 | TICv8 |
| 6526 | 1.23 | 0.81 | — | — | — | 123.5 | Mortier et al. 2013 | TICv8 |
| 6462.0 | — | 1.24 | — | 0.38 | — | 123.5 | Gaia DR2 | TICv8 |
| 6400 | 1.28 | 1.23 | 1 | — | — | 123.5 | Southworth et al. 2009 | TICv8 |
| 6400 | 1.26 | 1.22 | 0.50 | — | — | 123.5 | Southworth 2010 | TICv8 |
| — | 1.28 | — | — | — | — | 123.5 | Knutson et al. 2014 | TICv8 |
| 6400 | — | 1.35 | — | — | — | 123.5 | ExoFOP | TICv8 |
| 6432 | 1.29 | 1.32 | 1.57 | 0.43 | — | 123.5 | Cortés-Zuleta et al. 2020 | TICv8 |
| 6400 | — | — | — | — | — | 123.5 | Hellier et al. 2009 | TICv8 |
| 6431 | 1.46 | 1.26 | — | — | — | 123.5 | Shporer et al. 2019 | TICv8 |
| 6455 | 1.27 | 1.23 | 0.40 | — | — | 123.5 | Southworth 2012 | TICv8 |
| 6332 | 1.25 | 1.26 | 1.40 | 0.36 | — | 123.5 | Deline et al. 2025 | TICv8 |
| 6400 | — | — | 0.70 | — | F6 IV-V | 123.5 | Salz et al. 2015 | TICv8 |
| 6226 | 1.20 | 1.35 | — | 0.39 | — | 123.5 | TICv8 | TICv8 |
| 6400 | 1.24 | 1.36 | — | — | F6 | 123.5 | Triaud et al. 2010 | TICv8 |
| 6431 | 1.46 | 1.29 | — | — | — | 123.5 | Stassun et al. 2017 | TICv8 |
| 6400 | 1.25 | 1.22 | 1 | — | — | 123.5 | Bonomo et al. 2017 | TICv8 |
| 6400 | 1.22 | 1.23 | — | — | — | 123.5 | Pearson 2019 | TICv8 |