Temperature
5315 K
4901.8 to 5315
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Stellar HostProfile
WASP-42
Unclassified star • 177.3 pc
Records
7
literature rows
Planets
1
system count
References
8
distinct source labels
TIC: TIC 248075138
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: Southworth et al. 2016 • System source: TICv8
Mass
0.95 Msun
0.88 to 0.95
Radius
0.89 Rsun
0.79 to 0.92
Age
4.40 Gyr
4.40 to 11.30
Distance
177.3 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.89 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
WASP-42
0.89 R☉
System Layout
Known planets
1 planets linked to this host
WASP-42 b
Transit
◌
Discovery
2012
Period
4.98 days
Radius
12.58 R⊕
Mass
167.5 M⊕
Eq. Temp
1021 K
WASP-42 and Its Solitary Giant
WASP-42 is a star 578 light-years away with one known planet. The star is 4.4 billion years old, has 0.951 solar masses, 0.892 solar radii, and a temperature of 5320 K. Its radius is smaller than the Sun's, and its temperature is cooler than the Sun's.
The planet WASP-42 b is Jupiter-like and was discovered by transit in 2012. It has 167 Earth masses, 12.6 Earth radii, and an orbital period of 4.98 days, which is the time it takes to complete one orbit. Its radius is larger than Earth's, and its mass is larger than Earth's. Its mean density is 0.464 g/cm³, 0.0842 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
7
Stellar refs
7
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 |
|---|---|---|---|---|---|---|---|---|
| 5315 | — | 0.79 | — | — | — | 177.3 | ExoFOP | TICv8 |
| 5200 | 0.88 | 0.86 | — | — | — | 177.3 | Lendl et al. 2012 | TICv8 |
| 5200 | 0.88 | 0.85 | 11.30 | — | — | 177.3 | Bonomo et al. 2017 | TICv8 |
| 5315 | 0.92 | 0.79 | — | -0.35 | — | 177.3 | TICv8 | TICv8 |
| 5315 | 0.90 | 0.91 | — | — | — | 177.3 | Mortier et al. 2013 | TICv8 |
| 4901.8 | — | 0.92 | — | -0.36 | — | 177.3 | Gaia DR2 | TICv8 |
| 5315 | 0.95 | 0.89 | 4.40 | — | — | 177.3 | Southworth et al. 2016 | TICv8 |