Key parameters at a glance

A radius of 13.31 Earth radii
A mass of 100.43 Earth masses
Surface gravity around 0.57 g
An orbital period of 4.533 days
Semi-major axis 0.0550 AU
Equilibrium temperature 1,312 K (1039 °C)
Distance from Earth 1,477.81 light-years
Earth Similarity Index 0.085
Travel time at Voyager 1 speed 26,061,170 years

WASP-151 b Planet Profile

Physical Specs

Radius

13.31 R⊕

Radius (Jupiter)

1.187 R♃

Mass

100.43 M⊕

Mass (Jupiter)

0.316 M♃

Density

0.25 g/cm³

Surface Gravity

0.57 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.085

HZ Position Inner

Controversial No

Discovery

Year 2017

Method Transit

Facility SuperWASP-South

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#791of 1771

top 44.6%

This planet

13.31R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-4145 A b 13.31 R⊕ HD 12661 b 13.30 R⊕ HD 129445 b 13.30 R⊕

Metric	Earth	WASP-151 b	Jupiter
Radius (R⊕)	1.00	13.31	11.21
Mass (M⊕)	1.00	100.43	317.83
Density (g/cm³)	5.51	0.25	1.33
Surface Gravity (g)	1.00	0.57	2.53
Insolation (S⊕)	1.00	460.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	100.434 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 262662119

Gaia DR2

Gaia DR2 2657135741633337088

Gaia DR3

Gaia DR3 2657135741633337088

System

WASP-151

Percentile among Gas Giant cohort

Radius 13.305 R⊕ · percentile 55 / cohort 1771

Mass 100.434 M⊕ · percentile 6 / cohort 1747

Orbital period 4.53 d · percentile 34 / cohort 1533

Distance 453.10 pc · percentile 73 / cohort 1759

ESI 0.085 · percentile 20 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4.533 days

Semi-major axis

0.0550 AU

Eccentricity

0.000

Inclination

88.25 °

Year Length

A year here lasts approximately 4.53 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0550 AU.

Transit Fingerprint

Depth

1.066 %

Duration

3.664 h

Impact parameter b

0.304

Rp / R★

0.101100

Transit midpoint (BJD)

2,457,763.6762

Photometric dip

Transit produces a flux drop of 10,664 ppm lasting ≈ 3.66 h.

Extended Orbital Architecture

Planet / star radius ratio

0.101100

Semi-major axis / stellar radius

10.340

Impact parameter (b)

0.304

RV semi-amplitude (K)

37.000 m/s

Transit mid-time (BJD)

2,457,763.6762

Long. of periastron (ω)

-50.00°

Angular separation (arcsec)

0.12100

Eq. Temperature

1,312K

(1039 °C)

Insolation (S⊕)

460.00

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

Demangeon et al. 2018

Instrument

iKon-L CCD Camera

Publication

2018-03

Observation locale

Ground

Discovery cohort

Planets confirmed in 2017 at SuperWASP-South (3 shown).

WASP-105 b · Gas Giant WASP-107 b · Gas Giant WASP-91 b · Gas Giant

Host System: WASP-151

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,871 K — hotter than the Sun (5,778 K)

Estimated Age

5.50 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.181 R☉

Stellar Mass

1.081 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

4.350 dex

Stellar density

0.925 g/cm³

Systemic radial velocity

-13.24 km/s

Rotational v·sin i

4.25 km/s

Metallicity ratio

[Fe/H]

Distance

453.10 parsec

Light-years 1,477.81 ly

V-band magnitude

12.82 mag

Voyager-speed travel 26,061,170 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

2.179 mas

Total Proper Motion

10.565 mas/yr

PM Right Ascension

-0.13 mas/yr

PM Declination

-10.56 mas/yr

Galactic Cartesian (pc)

x = 0.982 · y = -0.190 · z = 0.005

Equatorial (J2000)

RA 349.06347° · Dec 0.30669°

Galactic ℓ, b

79.216° · -54.280°

Ecliptic λ, β

350.063° · 4.610°

HTM-20 index

9362762