Key parameters at a glance

A radius of 13.56 Earth radii
A mass of 854.96 Earth masses
Surface gravity around 4.65 g
An orbital period of 3.311 days
Semi-major axis 0.0469 AU
Equilibrium temperature 1,540 K (1267 °C)
Distance from Earth 1,684.74 light-years
Earth Similarity Index 0.098
Travel time at Voyager 1 speed 29,710,317 years

WASP-141 b Planet Profile

Physical Specs

Radius

13.56 R⊕

Radius (Jupiter)

1.210 R♃

Mass

854.96 M⊕

Mass (Jupiter)

2.690 M♃

Density

1.98 g/cm³

Surface Gravity

4.65 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.098

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility SuperWASP-South

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#660of 1771

top 37.2%

This planet

13.56R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-5 b 13.56 R⊕ WASP-26 b 13.56 R⊕ WASP-133 b 13.56 R⊕

Metric	Earth	WASP-141 b	Jupiter
Radius (R⊕)	1.00	13.56	11.21
Mass (M⊕)	1.00	854.96	317.83
Density (g/cm³)	5.51	1.98	1.33
Surface Gravity (g)	1.00	4.65	2.53
Insolation (S⊕)	1.00	1,061.55	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	854.963 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 117979897

Gaia DR2

Gaia DR2 2980392087185289216

Gaia DR3

Gaia DR3 2980392087185289216

System

WASP-141

Percentile among Gas Giant cohort

Radius 13.563 R⊕ · percentile 63 / cohort 1771

Mass 854.963 M⊕ · percentile 63 / cohort 1747

Orbital period 3.31 d · percentile 20 / cohort 1533

Distance 516.54 pc · percentile 76 / cohort 1759

ESI 0.098 · percentile 26 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.311 days

Semi-major axis

0.0469 AU

Eccentricity

0.000

Inclination

87.60 °

Year Length

A year here lasts approximately 3.31 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0469 AU.

Transit Fingerprint

Depth

0.830 %

Duration

3.600 h

Impact parameter b

0.310

Rp / R★

0.091100

Transit midpoint (BJD)

2,457,019.5953

Photometric dip

Transit produces a flux drop of 8,300 ppm lasting ≈ 3.60 h.

Extended Orbital Architecture

Planet / star radius ratio

0.091100

Semi-major axis / stellar radius

7.400

Impact parameter (b)

0.310

RV semi-amplitude (K)

315.000 m/s

Transit mid-time (BJD)

2,457,019.5953

Angular separation (arcsec)

0.09080

Eq. Temperature

1,540K

(1267 °C)

Insolation (S⊕)

1,061.55

Earth = 1.00

Earth Similarity (ESI)

0.098

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

Hellier et al. 2017

Instrument

iKon-L CCD Camera

Publication

2017-03

Observation locale

Ground

Discovery cohort

Planets confirmed in 2016 at SuperWASP-South (11 shown).

WASP-132 b · Gas Giant WASP-130 b · Neptune-like WASP-129 b · Gas Giant WASP-139 b · Neptune-like WASP-140 b · Gas Giant WASP-124 b · Gas Giant WASP-126 b · Gas Giant WASP-119 b · Gas Giant WASP-133 b · Gas Giant WASP-131 b · Gas Giant WASP-142 b · Gas Giant

Host System: WASP-141

Spectral Class

F-type yellow-white

Effective Temperature

5,900 K — hotter than the Sun (5,778 K)

Estimated Age

5.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.370 R☉

Stellar Mass

1.250 M☉

Metallicity [Fe/H]

0.29

Extended Stellar Properties

Surface gravity (log g)

4.260 dex

Stellar density

0.690 g/cm³

Systemic radial velocity

33.83 km/s

Rotational v·sin i

3.90 km/s

Metallicity ratio

[Fe/H]

Distance

516.54 parsec

Light-years 1,684.74 ly

V-band magnitude

12.65 mag

Voyager-speed travel 29,710,317 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

1.907 mas

Total Proper Motion

7.780 mas/yr

PM Right Ascension

7.53 mas/yr

PM Declination

-1.95 mas/yr

Galactic Cartesian (pc)

x = 0.298 · y = 0.908 · z = -0.294

Equatorial (J2000)

RA 71.82443° · Dec -17.11517°

Galactic ℓ, b

215.536° · -34.940°

Ecliptic λ, β

67.392° · -39.139°

HTM-20 index

891585368