Key parameters at a glance
- A radius of 13.23 Earth radii
- A mass of 441.78 Earth masses
- Surface gravity around 2.53 g
- An orbital period of 2.904 days
- Semi-major axis 0.0460 AU
- Equilibrium temperature 2,016 K (1743 °C)
- Distance from Earth 1,183.02 light-years
- Earth Similarity Index 0.066
- Travel time at Voyager 1 speed 20,862,499 years
WASP-71 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#844of 1771
top 47.6%
This planet
13.23R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-71 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.23 | 11.21 |
| Mass (M⊕) | 1.00 | 441.78 | 317.83 |
| Density (g/cm³) | 5.51 | 1.10 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.53 | 2.53 |
| Insolation (S⊕) | 1.00 | 3,384.61 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 441.784 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 422655579
Gaia DR2
Gaia DR2 2507901914613005056
Gaia DR3
Gaia DR3 2507901914613201024
System
WASP-71
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.90 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0460 AU.
Transit Fingerprint
Depth
0.440 %
Duration
5.047 h
Impact parameter b
0.190
Rp / R★
0.064600
Transit midpoint (BJD)
2,458,720.9329
Photometric dip
Transit produces a flux drop of 4,400 ppm lasting ≈ 5.05 h.
Extended Orbital Architecture
Planet / star radius ratio
0.064600
Semi-major axis / stellar radius
4.300
Impact parameter (b)
0.190
RV semi-amplitude (K)
236.400 m/s
Transit mid-time (BJD)
2,458,720.9329
Sky-projected obliquity (λ)
-1.90°
Angular separation (arcsec)
0.12700
Eq. Temperature
2,016K
(1743 °C)
Insolation (S⊕)
3,384.61
Earth = 1.00
Earth Similarity (ESI)
0.066
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
Smith et al. 2013Instrument
iKon-L CCD Camera
Publication
2013-04
Observation locale
Ground
Discovery cohort
Planets confirmed in 2012 at SuperWASP (12 shown).
Host System: WASP-71
Spectral Class
F-type yellow-white
Effective Temperature
6,050 K — hotter than the Sun (5,778 K)
Estimated Age
3.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.820 R☉
Stellar Mass
0.760 M☉
Metallicity [Fe/H]
0.15
Extended Stellar Properties
Surface gravity (log g)
3.900 dex
Stellar density
0.180 g/cm³
Systemic radial velocity
7.79 km/s
Rotational v·sin i
7.80 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.729 mas
Total Proper Motion
24.361 mas/yr
PM Right Ascension
23.31 mas/yr
PM Declination
-7.09 mas/yr
Galactic Cartesian (pc)
x = 0.872 · y = 0.489 · z = 0.013
Equatorial (J2000)
RA 29.26345° · Dec 0.75882°
Galactic ℓ, b
155.089° · -57.957°
Ecliptic λ, β
27.477° · -10.502°
HTM-20 index
-1135804103
Similar Worlds
HD 153950 b
Gas Giant · F-type yellow-white
Radius 13.20 R⊕ · 158.0 ly
HD 12484 b
Gas Giant · F-type yellow-white
Radius 13.20 R⊕ · 157.7 ly
HD 103891 b
Gas Giant · F-type yellow-white
Radius 13.20 R⊕ · 181.1 ly
HD 75898 b
Gas Giant · F-type yellow-white
Radius 13.20 R⊕ · 254.6 ly
HD 196885 A b
Gas Giant · F-type yellow-white
Radius 13.20 R⊕ · 111.4 ly
HD 169830 b
Gas Giant · F-type yellow-white
Radius 13.20 R⊕ · 122.7 ly