Temperature
5400 K
5400 to 5540
←Back to Stellar Hosts
Stellar HostProfile
WASP-4
Unclassified star • 267.2 pc
Records
19
literature rows
Planets
1
system count
References
20
distinct source labels
TIC: TIC 402026209
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: Bouma et al. 2019 • System source: TICv8
Mass
0.86 Msun
0.86 to 0.97
Radius
0.89 Rsun
0.89 to 0.92
Age
7 Gyr
6.40 to 7
Distance
267.2 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-4
0.89 R☉
System Layout
Known planets
1 planets linked to this host
WASP-4 b
Transit
◌
Discovery
2007
Period
1.34 days
Radius
15.12 R⊕
Mass
381.4 M⊕
Eq. Temp
1653 K
WASP-4 and Its Jupiter-Like Planet
WASP-4 is a star 872 light-years away with a spectral type of G8. Its age is 7 billion years, and its mass and radius are 0.864 solar masses and 0.893 solar radii, both smaller than the Sun's corresponding values. Its temperature is 5400 K, cooler than the Sun is. The host's reported mass estimate is smaller than the Sun's, and its reported radius estimate is also smaller. One planet orbits this star.
That planet, WASP-4 b, was discovered by the transit method in 2007 and is classified as Jupiter-like because its radius exceeds four times Earth's. Its radius estimate of 15.1 Earth radii is larger than Earth's, and its mass estimate of 381 Earth masses is larger than Earth's, roughly 1.2 times Jupiter's mass. Its orbital period is 1.34 days, so it completes one orbit of WASP-4 in a little over a day. Its mean density is 0.608 g/cm³, 0.11 times Earth's.
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 |
|---|---|---|---|---|---|---|---|---|
| 5436 | 0.89 | 0.92 | 7 | — | — | 267.2 | Petrucci et al. 2013 | TICv8 |
| 5504 | 0.97 | 0.89 | — | -0.18 | — | 267.2 | TICv8 | TICv8 |
| — | 0.92 | — | — | — | — | 267.2 | Knutson et al. 2014 | TICv8 |
| 5436 | — | 0.89 | — | — | — | 267.2 | ExoFOP | TICv8 |
| 5500 | 0.94 | 0.91 | — | — | — | 267.2 | Southworth et al. 2009 | TICv8 |
| — | — | 0.91 | — | — | — | 267.2 | Hoyer et al. 2013 | TICv8 |
| 5513 | 0.89 | 0.91 | — | — | — | 267.2 | Mortier et al. 2013 | TICv8 |
| — | — | — | — | — | G7 V | 267.2 | Wilson et al. 2008 | TICv8 |
| — | 0.93 | 0.90 | — | — | — | 267.2 | Baluev et al. 2020 | TICv8 |
| 5500 | 0.93 | 0.91 | — | -0.17 | — | 267.2 | Winn et al. 2009 | TICv8 |
| 5400 | 0.86 | 0.89 | 7 | — | — | 267.2 | Bouma et al. 2019 | TICv8 |
| 5436 | 0.89 | 0.92 | 7 | — | — | 267.2 | Bonomo et al. 2017 | TICv8 |
| 5500 | 0.87 | 0.90 | — | — | — | 267.2 | Stassun et al. 2017 | TICv8 |
| 5500 | 0.91 | 0.91 | 7 | — | — | 267.2 | Southworth 2010 | TICv8 |
| 5540 | 0.93 | 0.91 | 6.40 | — | — | 267.2 | Southworth 2012 | TICv8 |
| — | 0.90 | 0.91 | — | — | — | 267.2 | Baştürk et al. 2025 | TICv8 |
| 5500 | 0.93 | 0.90 | — | — | G8 | 267.2 | Triaud et al. 2010 | TICv8 |
| 5425 | — | 0.92 | — | -0.18 | — | 267.2 | Gaia DR2 | TICv8 |
| — | — | — | — | — | — | 267.2 | Gillon et al. 2009 | TICv8 |