Key parameters at a glance

A radius of 9.53 Earth radii
A mass of 47.04 Earth masses
Surface gravity around 0.52 g
An orbital period of 3.377 days
Semi-major axis 0.0451 AU
Equilibrium temperature 1,479 K (1206 °C)
Distance from Earth 1,068.49 light-years
Earth Similarity Index 0.084
Travel time at Voyager 1 speed 18,842,883 years

WASP-182 b Planet Profile

Physical Specs

Radius

9.53 R⊕

Radius (Jupiter)

0.850 R♃

Mass

47.04 M⊕

Mass (Jupiter)

0.148 M♃

Density

0.32 g/cm³

Surface Gravity

0.52 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.084

HZ Position Inner

Controversial No

Discovery

Year 2019

Method Transit

Facility WASP-South

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#42of 574

top 7.1%

This planet

9.53R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

WASP-144 b 9.53 R⊕ TOI-6695 b 9.53 R⊕ HD 21411 b 9.52 R⊕

Metric	Earth	WASP-182 b	Jupiter
Radius (R⊕)	1.00	9.53	11.21
Mass (M⊕)	1.00	47.04	317.83
Density (g/cm³)	5.51	0.32	1.33
Surface Gravity (g)	1.00	0.52	2.53
Insolation (S⊕)	1.00	756.26	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	47.039 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 369455629

Gaia DR2

Gaia DR2 6677909439240233472

Gaia DR3

Gaia DR3 6677909439240233472

System

WASP-182

Percentile among Neptune-like cohort

Radius 9.528 R⊕ · percentile 93 / cohort 574

Mass 47.039 M⊕ · percentile 69 / cohort 574

Orbital period 3.38 d · percentile 7 / cohort 524

Distance 327.60 pc · percentile 49 / cohort 572

ESI 0.084 · percentile 1 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

3.377 days

Semi-major axis

0.0451 AU

Eccentricity

0.000

Inclination

83.88 °

Year Length

A year here lasts approximately 3.38 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0451 AU.

Transit Fingerprint

Depth

0.426 %

Duration

2.597 h

Impact parameter b

0.775

Rp / R★

0.060700

Transit midpoint (BJD)

2,458,018.6602

Photometric dip

Transit produces a flux drop of 4,260 ppm lasting ≈ 2.60 h.

Extended Orbital Architecture

Planet / star radius ratio

0.060700

Semi-major axis / stellar radius

8.300

Impact parameter (b)

0.775

RV semi-amplitude (K)

19.000 m/s

Transit mid-time (BJD)

2,458,018.6602

Angular separation (arcsec)

0.13800

Eq. Temperature

1,479K

(1206 °C)

Insolation (S⊕)

756.26

Earth = 1.00

Earth Similarity (ESI)

0.084

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

Nielsen et al. 2019

Instrument

iKon-L CCD Camera

Publication

2019-10

Observation locale

Ground

Discovery cohort

Planets confirmed in 2019 at WASP-South (9 shown).

WASP-166 b · Neptune-like WASP-185 b · Gas Giant WASP-171 b · Gas Giant WASP-190 b · Gas Giant WASP-192 b · Gas Giant WASP-175 b · Gas Giant WASP-184 b · Gas Giant WASP-169 b · Gas Giant WASP-178 b · Gas Giant

Host System: WASP-182

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,638 K — cooler than the Sun (5,778 K)

Estimated Age

5.95 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.340 R☉

Stellar Mass

1.076 M☉

Metallicity [Fe/H]

0.27

Extended Stellar Properties

Surface gravity (log g)

4.218 dex

Stellar density

0.636 g/cm³

Systemic radial velocity

-34.13 km/s

Rotational v·sin i

1.40 km/s

Rotation period

30.00 days

Metallicity ratio

[Fe/H]

Distance

327.60 parsec

Light-years 1,068.49 ly

V-band magnitude

11.98 mag

Voyager-speed travel 18,842,883 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

3.024 mas

Total Proper Motion

37.776 mas/yr

PM Right Ascension

30.96 mas/yr

PM Declination

-21.65 mas/yr

Galactic Cartesian (pc)

x = 0.495 · y = -0.557 · z = -0.667

Equatorial (J2000)

RA 311.67335° · Dec -41.82098°

Galactic ℓ, b

359.586° · -38.588°

Ecliptic λ, β

302.557° · -22.977°

HTM-20 index

-1319784540