Key parameters at a glance
- A radius of 13.56 Earth radii
- A mass of 368.68 Earth masses
- Surface gravity around 2.00 g
- An orbital period of 2.176 days
- Semi-major axis 0.0345 AU
- Equilibrium temperature 1,790 K (1517 °C)
- Distance from Earth 1,823.49 light-years
- Earth Similarity Index 0.073
- Travel time at Voyager 1 speed 32,157,174 years
WASP-133 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#660of 1771
top 37.2%
This planet
13.56R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-133 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.56 | 11.21 |
| Mass (M⊕) | 1.00 | 368.68 | 317.83 |
| Density (g/cm³) | 5.51 | 0.88 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.00 | 2.53 |
| Insolation (S⊕) | 1.00 | 2,054.80 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 368.683 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 92449173
Gaia DR2
Gaia DR2 6778662809294560896
Gaia DR3
Gaia DR3 6778662809294560896
System
WASP-133
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.18 Earth days (0.6% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0345 AU.
Transit Fingerprint
Depth
0.811 %
Duration
3.439 h
Impact parameter b
0.200
Rp / R★
0.086000
Transit midpoint (BJD)
2,457,116.9874
Photometric dip
Transit produces a flux drop of 8,115 ppm lasting ≈ 3.44 h.
Extended Orbital Architecture
Planet / star radius ratio
0.086000
Semi-major axis / stellar radius
5.155
Impact parameter (b)
0.200
RV semi-amplitude (K)
170.000 m/s
Transit mid-time (BJD)
2,457,116.9874
Angular separation (arcsec)
0.06170
Eq. Temperature
1,790K
(1517 °C)
Insolation (S⊕)
2,054.80
Earth = 1.00
Earth Similarity (ESI)
0.073
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
Maxted et al. 2016Instrument
iKon-L CCD Camera
Publication
2016-06
Observation locale
Ground
Discovery cohort
Planets confirmed in 2016 at SuperWASP-South (11 shown).
Host System: WASP-133
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,700 K — cooler than the Sun (5,778 K)
Estimated Age
6.80 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.440 R☉
Stellar Mass
1.160 M☉
Metallicity [Fe/H]
0.29
Extended Stellar Properties
Surface gravity (log g)
4.180 dex
Stellar density
0.550 g/cm³
Systemic radial velocity
-23.91 km/s
Rotational v·sin i
0.30 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
1.762 mas
Total Proper Motion
14.635 mas/yr
PM Right Ascension
12.09 mas/yr
PM Declination
-8.25 mas/yr
Galactic Cartesian (pc)
x = 0.569 · y = -0.578 · z = -0.585
Equatorial (J2000)
RA 314.57544° · Dec -35.79662°
Galactic ℓ, b
7.633° · -40.256°
Ecliptic λ, β
306.731° · -17.868°
HTM-20 index
-152110313
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