Key parameters at a glance
- A radius of 13.81 Earth radii
- A mass of 179.26 Earth masses
- Surface gravity around 0.94 g
- An orbital period of 3.765 days
- Semi-major axis 0.0473 AU
- Equilibrium temperature 1,217 K (944 °C)
- Distance from Earth 689.55 light-years
- Earth Similarity Index 0.100
- Travel time at Voyager 1 speed 12,160,142 years
WASP-25 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#509of 1771
top 28.7%
This planet
13.81R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-25 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.81 | 11.21 |
| Mass (M⊕) | 1.00 | 179.26 | 317.83 |
| Density (g/cm³) | 5.51 | 0.40 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.94 | 2.53 |
| Insolation (S⊕) | 1.00 | 341.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 179.255 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 229047362
Gaia DR2
Gaia DR2 6186950525042445824
Gaia DR3
Gaia DR3 6186950525042445824
System
WASP-25
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.76 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0473 AU.
Transit Fingerprint
Depth
2.226 %
Duration
2.760 h
Impact parameter b
0.357
Rp / R★
0.138700
Transit midpoint (BJD)
2,455,274.9965
Photometric dip
Transit produces a flux drop of 22,257 ppm lasting ≈ 2.76 h.
Extended Orbital Architecture
Planet / star radius ratio
0.138700
Semi-major axis / stellar radius
11.330
Impact parameter (b)
0.357
RV semi-amplitude (K)
75.300 m/s
Transit mid-time (BJD)
2,455,274.9965
Long. of periastron (ω)
0.00°
Sky-projected obliquity (λ)
14.60°
Angular separation (arcsec)
0.22400
Eq. Temperature
1,217K
(944 °C)
Insolation (S⊕)
341.00
Earth = 1.00
Earth Similarity (ESI)
0.100
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
Enoch et al. 2010Instrument
iKon-L CCD Camera
Publication
2011-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 2010 at SuperWASP (12 shown).
Host System: WASP-25
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,697 K — cooler than the Sun (5,778 K)
Estimated Age
1.90 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.884 R☉
Stellar Mass
0.962 M☉
Metallicity [Fe/H]
-0.20
Extended Stellar Properties
Surface gravity (log g)
4.529 dex
Stellar density
1.961 g/cm³
Systemic radial velocity
-2.63 km/s
Rotational v·sin i
2.50 km/s
Rotation period
16.93 days
Activity index (log R'HK)
-4.507
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.701 mas
Total Proper Motion
29.937 mas/yr
PM Right Ascension
-29.27 mas/yr
PM Declination
-6.29 mas/yr
Galactic Cartesian (pc)
x = -0.855 · y = -0.235 · z = -0.462
Equatorial (J2000)
RA 195.35976° · Dec -27.52223°
Galactic ℓ, b
305.649° · 35.297°
Ecliptic λ, β
205.027° · -19.301°
HTM-20 index
2097641408
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