Key parameters at a glance
- A radius of 12.18 Earth radii
- A mass of 502.15 Earth masses
- Surface gravity around 3.38 g
- An orbital period of 1.628 days
- Semi-major axis 0.0267 AU
- Equilibrium temperature 1,706 K (1433 °C)
- Distance from Earth 1,008.27 light-years
- Earth Similarity Index 0.087
- Travel time at Voyager 1 speed 17,780,821 years
WASP-5 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1440of 1771
top 81.3%
This planet
12.18R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-5 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.18 | 11.21 |
| Mass (M⊕) | 1.00 | 502.15 | 317.83 |
| Density (g/cm³) | 5.51 | 1.64 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.38 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,559.48 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 502.150 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 184240683
Gaia DR2
Gaia DR2 6533307957785865856
Gaia DR3
Gaia DR3 6533307957785865856
System
WASP-5
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.63 Earth days (0.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0267 AU.
Transit Fingerprint
Depth
1.180 %
Duration
2.369 h
Impact parameter b
0.310
Rp / R★
0.110800
Transit midpoint (BJD)
2,454,373.9960
Photometric dip
Transit produces a flux drop of 11,800 ppm lasting ≈ 2.37 h.
Extended Orbital Architecture
Planet / star radius ratio
0.110800
Semi-major axis / stellar radius
5.400
Impact parameter (b)
0.310
RV semi-amplitude (K)
279.700 m/s
Transit mid-time (BJD)
2,454,373.9960
Long. of periastron (ω)
34.38°
Sky-projected obliquity (λ)
12.10°
Angular separation (arcsec)
0.08640
Eq. Temperature
1,706K
(1433 °C)
Insolation (S⊕)
1,559.48
Earth = 1.00
Earth Similarity (ESI)
0.087
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
Anderson et al. 2008Instrument
iKon-L CCD Camera
Publication
2008-06
Observation locale
Ground
Discovery cohort
Planets confirmed in 2008 at SuperWASP (5 shown).
Host System: WASP-5
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,700 K — cooler than the Sun (5,778 K)
Estimated Age
5.40 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.029 R☉
Stellar Mass
0.960 M☉
Metallicity [Fe/H]
0.09
Extended Stellar Properties
Surface gravity (log g)
4.395 dex
Stellar density
1.240 g/cm³
Systemic radial velocity
20.01 km/s
Rotational v·sin i
3.50 km/s
Rotation period
16.20 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.206 mas
Total Proper Motion
17.548 mas/yr
PM Right Ascension
7.33 mas/yr
PM Declination
-15.94 mas/yr
Galactic Cartesian (pc)
x = 0.751 · y = -0.009 · z = -0.660
Equatorial (J2000)
RA 359.34903° · Dec -41.27722°
Galactic ℓ, b
337.593° · -72.018°
Ecliptic λ, β
340.216° · -37.004°
HTM-20 index
1867845843
Observation Record
Photometric series
5
RV measurements
1
Emission spectra
5
Archive notes
2
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