Key parameters at a glance

A radius of 17.37 Earth radii
A mass of 123.95 Earth masses
Surface gravity around 0.41 g
An orbital period of 3.333 days
Semi-major axis 0.0480 AU
Equilibrium temperature 1,700 K (1427 °C)
Distance from Earth 1,990.13 light-years
Earth Similarity Index 0.053
Travel time at Voyager 1 speed 35,095,864 years

WASP-153 b Planet Profile

Physical Specs

Radius

17.37 R⊕

Radius (Jupiter)

1.550 R♃

Mass

123.95 M⊕

Mass (Jupiter)

0.390 M♃

Density

0.15 g/cm³

Surface Gravity

0.41 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.053

HZ Position Inner

Controversial No

Discovery

Year 2017

Method Transit

Facility SuperWASP

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#95of 1771

top 5.3%

This planet

17.37R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

CD-35 2722 b 17.37 R⊕ TOI-2580 b 17.37 R⊕ WASP-31 b 17.36 R⊕

Metric	Earth	WASP-153 b	Jupiter
Radius (R⊕)	1.00	17.37	11.21
Mass (M⊕)	1.00	123.95	317.83
Density (g/cm³)	5.51	0.15	1.33
Surface Gravity (g)	1.00	0.41	2.53
Insolation (S⊕)	1.00	1,400.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	123.954 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 157586003

Gaia DR2

Gaia DR2 2110106372987465216

Gaia DR3

Gaia DR3 2110106372987465216

System

WASP-153

Percentile among Gas Giant cohort

Radius 17.374 R⊕ · percentile 95 / cohort 1771

Mass 123.954 M⊕ · percentile 8 / cohort 1747

Orbital period 3.33 d · percentile 21 / cohort 1533

Distance 610.18 pc · percentile 79 / cohort 1759

ESI 0.053 · percentile 6 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.333 days

Semi-major axis

0.0480 AU

Eccentricity

0.009

Inclination

84.10 °

Year Length

A year here lasts approximately 3.33 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0480 AU.

Transit Fingerprint

Depth

0.831 %

Duration

3.840 h

Impact parameter b

0.480

Rp / R★

0.092000

Transit midpoint (BJD)

2,453,142.5420

Photometric dip

Transit produces a flux drop of 8,311 ppm lasting ≈ 3.84 h.

Extended Orbital Architecture

Planet / star radius ratio

0.092000

Semi-major axis / stellar radius

6.000

Impact parameter (b)

0.480

RV semi-amplitude (K)

44.000 m/s

Transit mid-time (BJD)

2,453,142.5420

Angular separation (arcsec)

0.07870

Eq. Temperature

1,700K

(1427 °C)

Insolation (S⊕)

1,400.00

Earth = 1.00

Earth Similarity (ESI)

0.053

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

Host System: WASP-153

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,914 K — hotter than the Sun (5,778 K)

Estimated Age

4.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.730 R☉

Stellar Mass

1.336 M☉

Metallicity [Fe/H]

0.34

Extended Stellar Properties

Surface gravity (log g)

4.100 dex

Stellar density

0.370 g/cm³

Systemic radial velocity

-28.32 km/s

Rotational v·sin i

5.19 km/s

Metallicity ratio

[Fe/H]

Distance

610.18 parsec

Light-years 1,990.13 ly

V-band magnitude

12.59 mag

Voyager-speed travel 35,095,864 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.610 mas

Total Proper Motion

8.783 mas/yr

PM Right Ascension

8.78 mas/yr

PM Declination

0.25 mas/yr

Galactic Cartesian (pc)

x = 0.123 · y = -0.756 · z = 0.643

Equatorial (J2000)

RA 279.26247° · Dec 40.01869°

Galactic ℓ, b

68.689° · 19.632°

Ecliptic λ, β

285.725° · 62.953°

HTM-20 index

-1907088668