Key parameters at a glance

A radius of 13.67 Earth radii
A mass of 203.41 Earth masses
Surface gravity around 1.09 g
An orbital period of 6.613 days
Semi-major axis 0.0650 AU
Equilibrium temperature 1,414 K (1141 °C)
Distance from Earth 1,824.00 light-years
Earth Similarity Index 0.085
Travel time at Voyager 1 speed 32,166,319 years

WASP-116 b Planet Profile

Physical Specs

Radius

13.67 R⊕

Radius (Jupiter)

1.220 R♃

Mass

203.41 M⊕

Mass (Jupiter)

0.640 M♃

Density

0.43 g/cm³

Surface Gravity

1.09 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.085

HZ Position Inner

Controversial No

Discovery

Year 2025

Method Transit

Facility SuperWASP

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#598of 1771

top 33.7%

This planet

13.67R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

VHS J125601.92-125723.9 b 13.67 R⊕ TOI-4201 b 13.67 R⊕ TOI-1994 b 13.67 R⊕

Metric	Earth	WASP-116 b	Jupiter
Radius (R⊕)	1.00	13.67	11.21
Mass (M⊕)	1.00	203.41	317.83
Density (g/cm³)	5.51	0.43	1.33
Surface Gravity (g)	1.00	1.09	2.53
Insolation (S⊕)	1.00	663.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	203.410 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 332911893

Gaia DR2

Gaia DR2 2493785078665571200

Gaia DR3

Gaia DR3 2493785078665571200

System

WASP-116

Percentile among Gas Giant cohort

Radius 13.675 R⊕ · percentile 66 / cohort 1771

Mass 203.410 M⊕ · percentile 20 / cohort 1747

Orbital period 6.61 d · percentile 41 / cohort 1533

Distance 559.24 pc · percentile 77 / cohort 1759

ESI 0.085 · percentile 20 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

6.613 days

Semi-major axis

0.0650 AU

Eccentricity

0.000

Inclination

89.57 °

Year Length

A year here lasts approximately 6.61 Earth days (1.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0650 AU.

Transit Fingerprint

Depth

0.776 %

Duration

5.646 h

Impact parameter b

0.070

Rp / R★

0.088100

Transit midpoint (BJD)

2,457,092.2253

Photometric dip

Transit produces a flux drop of 7,763 ppm lasting ≈ 5.65 h.

Extended Orbital Architecture

Planet / star radius ratio

0.088100

Semi-major axis / stellar radius

9.770

Impact parameter (b)

0.070

RV semi-amplitude (K)

59.670 m/s

Transit mid-time (BJD)

2,457,092.2253

Angular separation (arcsec)

0.11600

Eq. Temperature

1,414K

(1141 °C)

Insolation (S⊕)

663.00

Earth = 1.00

Earth Similarity (ESI)

0.085

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

Schanche et al. 2025

Instrument

e2v CCD Camera

Publication

2025-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2025 at SuperWASP (8 shown).

WASP-154 b · Gas Giant WASP-155 b · Gas Giant WASP-188 b · Gas Giant WASP-197 b · Gas Giant WASP-194 b · Gas Giant WASP-195 b · Gas Giant WASP-102 b · Gas Giant WASP-149 b · Gas Giant

Host System: WASP-116

Spectral Class

F-type yellow-white

Effective Temperature

6,250 K — hotter than the Sun (5,778 K)

Estimated Age

1.70 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.426 R☉

Stellar Mass

1.250 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.250 dex

Stellar density

0.404 g/cm³

Metallicity ratio

[Fe/H]

Distance

559.24 parsec

Light-years 1,824.00 ly

V-band magnitude

12.52 mag

Voyager-speed travel 32,166,319 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.760 mas

Total Proper Motion

8.823 mas/yr

PM Right Ascension

8.63 mas/yr

PM Declination

1.86 mas/yr

Galactic Cartesian (pc)

x = 0.817 · y = 0.576 · z = -0.032

Equatorial (J2000)

RA 35.21576° · Dec -1.82604°

Galactic ℓ, b

166.971° · -56.846°

Ecliptic λ, β

32.292° · -14.981°

HTM-20 index

344290081