Temperature
7308 K
7308 to 7430
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Stellar HostProfile
WASP-33
Unclassified star • 121.9 pc
Records
10
literature rows
Planets
1
system count
References
11
distinct source labels
HIP: HIP 11397TIC: TIC 129979528HD: HD 15082
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: Stassun et al. 2017 • System source: TICv8
Mass
1.85 Msun
1.50 to 1.85
Radius
1.55 Rsun
1.44 to 1.60
Distance
121.9 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.55 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
WASP-33
1.55 R☉
System Layout
Known planets
1 planets linked to this host
WASP-33 b
Transit
◌
Discovery
2010
Period
1.22 days
Radius
17.86 R⊕
Mass
665.2 M⊕
Eq. Temp
2781.7 K
WASP-33 b: A Jupiter-like World Around an A-type Star
WASP-33 is an A-type star located 398 light-years away, with a reported mass of 1.85 solar masses, a radius of 1.55 solar radii, and a temperature of 7310 K. 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.
That planet is WASP-33 b, a Jupiter-like world discovered in 2010 by the transit method, in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness. Its orbital period is 1.22 days, its mass is 665 Earth masses, and its radius is 17.9 Earth radii. Both its reported mass and radius estimates are larger than Earth's, and its mass is roughly 2.09 times Jupiter's mass. Its mean density is 0.644 g/cm³, 0.117 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
10
Stellar refs
10
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 7430 | 1.50 | 1.44 | — | — | — | 121.9 | Collier Cameron et al. 2010 | TICv8 |
| 7400 | — | — | — | — | — | 121.9 | Zhang et al. 2018 | TICv8 |
| 7430 | 1.50 | 1.44 | — | — | — | 121.9 | Chakrabarty & Sengupta 2019 | TICv8 |
| 7308 | 1.65 | 1.60 | — | 0.82 | — | 121.9 | TICv8 | TICv8 |
| 7308 | 1.85 | 1.55 | — | — | — | 121.9 | Stassun et al. 2017 | TICv8 |
| 7340 | — | 1.50 | — | — | A | 121.9 | Watanabe et al. 2022 | TICv8 |
| 7398.5 | — | 1.60 | — | — | — | 121.9 | ExoFOP | TICv8 |
| 7430 | — | — | — | — | — | 121.9 | Turner et al. 2016 | TICv8 |
| 7398.5 | — | 1.56 | — | 0.82 | — | 121.9 | Gaia DR2 | TICv8 |
| — | — | — | — | — | A5 | 121.9 | Cannon & Pickering 1918 | TICv8 |