Key parameters at a glance

A radius of 16.81 Earth radii
A mass of 133.49 Earth masses
Surface gravity around 0.47 g
An orbital period of 4.154 days
Semi-major axis 0.0519 AU
Equilibrium temperature 1,340 K (1067 °C)
Distance from Earth 991.32 light-years
Earth Similarity Index 0.071
Travel time at Voyager 1 speed 17,481,959 years

WASP-168 b Planet Profile

Physical Specs

Radius

16.81 R⊕

Radius (Jupiter)

1.500 R♃

Mass

133.49 M⊕

Mass (Jupiter)

0.420 M♃

Density

0.16 g/cm³

Surface Gravity

0.47 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.071

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

#116of 1771

top 6.5%

This planet

16.81R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

WASP-48 b 16.81 R⊕ HATS-27 b 16.81 R⊕ HIP 65426 b 16.81 R⊕

Metric	Earth	WASP-168 b	Jupiter
Radius (R⊕)	1.00	16.81	11.21
Mass (M⊕)	1.00	133.49	317.83
Density (g/cm³)	5.51	0.16	1.33
Surface Gravity (g)	1.00	0.47	2.53
Insolation (S⊕)	1.00	278.89	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	133.489 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 232038798

Gaia DR2

Gaia DR2 5555500000779464448

Gaia DR3

Gaia DR3 5555500000779464448

System

WASP-168

Percentile among Gas Giant cohort

Radius 16.814 R⊕ · percentile 93 / cohort 1771

Mass 133.489 M⊕ · percentile 10 / cohort 1747

Orbital period 4.15 d · percentile 31 / cohort 1533

Distance 303.94 pc · percentile 61 / cohort 1759

ESI 0.071 · percentile 13 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4.154 days

Semi-major axis

0.0519 AU

Eccentricity

0.000

Inclination

84.40 °

Year Length

A year here lasts approximately 4.15 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0519 AU.

Transit Fingerprint

Depth

1.190 %

Duration

1.913 h

Impact parameter b

0.970

Rp / R★

0.109000

Transit midpoint (BJD)

2,457,424.5278

Photometric dip

Transit produces a flux drop of 11,900 ppm lasting ≈ 1.91 h.

Extended Orbital Architecture

Planet / star radius ratio

0.109000

Semi-major axis / stellar radius

9.590

Impact parameter (b)

0.970

RV semi-amplitude (K)

50.000 m/s

Transit mid-time (BJD)

2,457,424.5278

Angular separation (arcsec)

0.17100

Eq. Temperature

1,340K

(1067 °C)

Insolation (S⊕)

278.89

Earth = 1.00

Earth Similarity (ESI)

0.071

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-158 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

Host System: WASP-168

Spectral Class

F-type yellow-white

Effective Temperature

6,000 K — hotter than the Sun (5,778 K)

Estimated Age

3.96 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.120 R☉

Stellar Mass

1.080 M☉

Metallicity [Fe/H]

-0.01

Extended Stellar Properties

Surface gravity (log g)

4.370 dex

Stellar density

1.100 g/cm³

Systemic radial velocity

50.46 km/s

Rotational v·sin i

0.30 km/s

Distance

303.94 parsec

Light-years 991.32 ly

V-band magnitude

12.12 mag

Voyager-speed travel 17,481,959 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

3.261 mas

Total Proper Motion

20.496 mas/yr

PM Right Ascension

0.08 mas/yr

PM Declination

20.50 mas/yr

Galactic Cartesian (pc)

x = -0.080 · y = 0.680 · z = -0.729

Equatorial (J2000)

RA 96.74464° · Dec -46.82136°

Galactic ℓ, b

255.078° · -23.415°

Ecliptic λ, β

103.549° · -69.944°

HTM-20 index

1898212323