Key parameters at a glance

A radius of 11.99 Earth radii
A mass of 886.75 Earth masses
Surface gravity around 6.16 g
An orbital period of 3.656 days
Semi-major axis 0.0517 AU
Equilibrium temperature 1,590 K (1317 °C)
Distance from Earth 1,712.30 light-years
Earth Similarity Index 0.103
Travel time at Voyager 1 speed 30,196,341 years

WASP-158 b Planet Profile

Physical Specs

Radius

11.99 R⊕

Radius (Jupiter)

1.070 R♃

Mass

886.75 M⊕

Mass (Jupiter)

2.790 M♃

Density

3.10 g/cm³

Surface Gravity

6.16 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.103

HZ Position Inner

Controversial No

Discovery

Year 2018

Method Transit

Facility SuperWASP-South

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#1510of 1771

top 85.2%

This planet

11.99R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

NGTS-9 b 11.99 R⊕ TOI-892 b 11.99 R⊕ WASP-150 b 11.99 R⊕

Metric	Earth	WASP-158 b	Jupiter
Radius (R⊕)	1.00	11.99	11.21
Mass (M⊕)	1.00	886.75	317.83
Density (g/cm³)	5.51	3.10	1.33
Surface Gravity (g)	1.00	6.16	2.53
Insolation (S⊕)	1.00	903.01	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	886.746 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 37718056

Gaia DR2

Gaia DR2 2424621502311961344

Gaia DR3

Gaia DR3 2424621502311961344

System

WASP-158

Percentile among Gas Giant cohort

Radius 11.994 R⊕ · percentile 15 / cohort 1771

Mass 886.746 M⊕ · percentile 64 / cohort 1747

Orbital period 3.66 d · percentile 25 / cohort 1533

Distance 524.99 pc · percentile 76 / cohort 1759

ESI 0.103 · percentile 27 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.656 days

Semi-major axis

0.0517 AU

Eccentricity

0.000

Inclination

87.70 °

Year Length

A year here lasts approximately 3.66 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0517 AU.

Transit Fingerprint

Depth

0.630 %

Duration

3.576 h

Impact parameter b

0.320

Rp / R★

0.079000

Transit midpoint (BJD)

2,457,619.9195

Photometric dip

Transit produces a flux drop of 6,300 ppm lasting ≈ 3.58 h.

Extended Orbital Architecture

Planet / star radius ratio

0.079000

Semi-major axis / stellar radius

8.000

Impact parameter (b)

0.320

RV semi-amplitude (K)

295.000 m/s

Transit mid-time (BJD)

2,457,619.9195

Angular separation (arcsec)

0.09850

Eq. Temperature

1,590K

(1317 °C)

Insolation (S⊕)

903.01

Earth = 1.00

Earth Similarity (ESI)

0.103

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. 2019

Instrument

iKon-L CCD Camera

Publication

2019-01

Observation locale

Ground

Discovery cohort

Planets confirmed in 2018 at SuperWASP-South (12 shown).

WASP-162 b · Gas Giant WASP-145 A b · Gas Giant WASP-144 b · Neptune-like WASP-170 b · Gas Giant WASP-160 B b · Gas Giant WASP-161 b · Gas Giant WASP-164 b · Gas Giant WASP-163 b · Gas Giant WASP-147 b · Gas Giant WASP-173 A b · Gas Giant WASP-165 b · Gas Giant WASP-168 b · Gas Giant

Host System: WASP-158

Spectral Class

F-type yellow-white

Effective Temperature

6,350 K — hotter than the Sun (5,778 K)

Estimated Age

1.93 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.390 R☉

Stellar Mass

1.380 M☉

Metallicity [Fe/H]

0.24

Extended Stellar Properties

Surface gravity (log g)

4.300 dex

Stellar density

0.750 g/cm³

Systemic radial velocity

24.20 km/s

Rotational v·sin i

9.30 km/s

Distance

524.99 parsec

Light-years 1,712.30 ly

V-band magnitude

12.04 mag

Voyager-speed travel 30,196,341 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.876 mas

Total Proper Motion

2.366 mas/yr

PM Right Ascension

1.83 mas/yr

PM Declination

-1.50 mas/yr

Galactic Cartesian (pc)

x = 0.979 · y = 0.071 · z = -0.190

Equatorial (J2000)

RA 4.14635° · Dec -10.97642°

Galactic ℓ, b

94.354° · -71.887°

Ecliptic λ, β

359.375° · -11.708°

HTM-20 index

1700397722