Temperature
5485 K
5326.6 to 5485
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Stellar HostProfile
WASP-39
Unclassified star • 214.0 pc
Records
8
literature rows
Planets
1
system count
References
9
distinct source labels
TIC: TIC 181949561
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: Mancini et al. 2018 • System source: TICv8
Mass
0.91 Msun
0.91 to 0.93
Radius
0.94 Rsun
0.90 to 1.01
Age
8.50 Gyr
8.50 to 9
Distance
214.0 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.94 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
WASP-39
0.94 R☉
System Layout
Known planets
1 planets linked to this host
WASP-39 b
Transit
◌
Discovery
2011
Period
4.06 days
Radius
14.34 R⊕
Mass
89.31 M⊕
Eq. Temp
1166 K
WASP-39 b: A Jupiter-Like World
WASP-39 is a star 698 light-years away with one known planet. The star is estimated to be 8.5 billion years old, with a mass of 0.913 solar masses and a radius of 0.939 solar radii. Its temperature is 5490 K, cooler than the Sun, and both its mass and radius estimates are smaller than the Sun's.
The planet WASP-39 b is Jupiter-like, discovered by transit in 2011. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness. WASP-39 b has a mass of 89.3 Earth masses, larger than Earth's, and a radius of 14.3 Earth radii, also larger than Earth's. It completes an orbit every 4.06 days. Its mean density is 0.167 g/cm³, 0.0303 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
8
Stellar refs
8
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | 0.92 | — | — | — | 214.0 | Maciejewski et al. 2016 | TICv8 |
| 5400 | 0.93 | 0.90 | 9 | — | — | 214.0 | Bonomo et al. 2017 | TICv8 |
| 5485 | 0.91 | 0.94 | 8.50 | — | — | 214.0 | Mancini et al. 2018 | TICv8 |
| 5341 | — | 0.93 | — | -0.20 | — | 214.0 | Gaia DR2 | TICv8 |
| — | — | — | — | — | — | 214.0 | Carter et al. 2024 | TICv8 |
| 5400 | 0.93 | 0.90 | — | — | — | 214.0 | Faedi et al. 2011 | TICv8 |
| 5326.6 | — | 1.01 | — | — | — | 214.0 | ExoFOP | TICv8 |
| 5326.6 | 0.92 | 1.01 | — | -0.13 | — | 214.0 | TICv8 | TICv8 |