Temperature
6272 K
6139.7 to 6336
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Stellar HostProfile
WASP-138
Unclassified star • 414.2 pc
Records
4
literature rows
Planets
1
system count
References
5
distinct source labels
TIC: TIC 35857242
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: Lam et al. 2017 • System source: TICv8
Mass
1.22 Msun
1.22 to 1.25
Radius
1.36 Rsun
1.36 to 1.46
Age
3.44 Gyr
single adopted value
Distance
414.2 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.36 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
WASP-138
1.36 R☉
System Layout
Known planets
1 planets linked to this host
WASP-138 b
Transit
◌
Discovery
2016
Period
3.63 days
Radius
12.22 R⊕
Mass
387.8 M⊕
Eq. Temp
1590 K
WASP-138 and Its Jupiter-Like Planet
WASP-138 is a star 1350 light-years away, with a mass of 1.22 solar masses, a radius of 1.36 solar radii, a temperature of 6270 K, and an age of 3.44 billion years. Its reported mass and radius estimates are larger than the Sun's, and its reported temperature is hotter than the Sun's. One planet orbits this host: WASP-138 b.
WASP-138 b is a Jupiter-like planet discovered by transit in 2016. It has a mass of 388 Earth masses, a radius of 12.2 Earth radii, and an orbital period of 3.63 days. Both its reported mass and radius estimates are larger than Earth's. Its mass estimate is roughly 1.22 times Jupiter's mass, and its mean density is 1.17 g/cm³, 0.213 times Earth's. A Jupiter-like planet exceeds 4 times Earth's radius.
Provenance
Underlying measurements and references
Evidence Summary
Rows
4
Stellar refs
4
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitystable