Key parameters at a glance

A radius of 16.03 Earth radii
A mass of 162.09 Earth masses
Surface gravity around 0.63 g
An orbital period of 3.586 days
Semi-major axis 0.0506 AU
Equilibrium temperature 1,560 K (1287 °C)
Distance from Earth 656.30 light-years
Earth Similarity Index 0.066
Travel time at Voyager 1 speed 11,573,923 years

WASP-101 b Planet Profile

Physical Specs

Radius

16.03 R⊕

Radius (Jupiter)

1.430 R♃

Mass

162.09 M⊕

Mass (Jupiter)

0.510 M♃

Density

0.24 g/cm³

Surface Gravity

0.63 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.066

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility SuperWASP

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#158of 1771

top 8.9%

This planet

16.03R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HATS-34 b 16.03 R⊕ WASP-58 b 16.03 R⊕ CoRoT-11 b 16.03 R⊕

Metric	Earth	WASP-101 b	Jupiter
Radius (R⊕)	1.00	16.03	11.21
Mass (M⊕)	1.00	162.09	317.83
Density (g/cm³)	5.51	0.24	1.33
Surface Gravity (g)	1.00	0.63	2.53
Insolation (S⊕)	1.00	1,089.17	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	162.093 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 47911178

Gaia DR2

Gaia DR2 2924661867160818304

Gaia DR3

Gaia DR3 2924661867160818304

System

WASP-101

Percentile among Gas Giant cohort

Radius 16.029 R⊕ · percentile 91 / cohort 1771

Mass 162.093 M⊕ · percentile 14 / cohort 1747

Orbital period 3.59 d · percentile 24 / cohort 1533

Distance 201.22 pc · percentile 50 / cohort 1759

ESI 0.066 · percentile 11 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.586 days

Semi-major axis

0.0506 AU

Eccentricity

0.000

Inclination

85.00 °

Year Length

A year here lasts approximately 3.59 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0506 AU.

Transit Fingerprint

Depth

1.300 %

Duration

2.707 h

Impact parameter b

0.745

Rp / R★

0.108900

Transit midpoint (BJD)

2,458,387.8325

Photometric dip

Transit produces a flux drop of 13,000 ppm lasting ≈ 2.71 h.

Extended Orbital Architecture

Planet / star radius ratio

0.108900

Semi-major axis / stellar radius

8.450

Impact parameter (b)

0.745

RV semi-amplitude (K)

54.000 m/s

Transit mid-time (BJD)

2,458,387.8325

Angular separation (arcsec)

0.25100

Eq. Temperature

1,560K

(1287 °C)

Insolation (S⊕)

1,089.17

Earth = 1.00

Earth Similarity (ESI)

0.066

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. 2014

Instrument

iKon-L CCD Camera

Publication

2014-05

Observation locale

Ground

Discovery cohort

Planets confirmed in 2014 at SuperWASP (12 shown).

WASP-94 B b · Gas Giant WASP-84 b · Gas Giant WASP-106 b · Gas Giant WASP-117 b · Gas Giant WASP-69 b · Gas Giant WASP-98 b · Gas Giant WASP-99 b · Gas Giant WASP-104 b · Gas Giant WASP-96 b · Gas Giant WASP-97 b · Gas Giant WASP-70 A b · Gas Giant WASP-28 b · Gas Giant

Host System: WASP-101

Spectral Class

F-type yellow-white

Effective Temperature

6,380 K — hotter than the Sun (5,778 K)

Estimated Age

1.14 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.310 R☉

Stellar Mass

1.410 M☉

Metallicity [Fe/H]

0.20

Extended Stellar Properties

Surface gravity (log g)

4.310 dex

Stellar density

0.890 g/cm³

Systemic radial velocity

42.64 km/s

Rotational v·sin i

12.40 km/s

Metallicity ratio

[Fe/H]

Distance

201.22 parsec

Light-years 656.30 ly

V-band magnitude

10.34 mag

Voyager-speed travel 11,573,923 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

4.941 mas

Total Proper Motion

25.123 mas/yr

PM Right Ascension

-2.57 mas/yr

PM Declination

24.99 mas/yr

Galactic Cartesian (pc)

x = -0.133 · y = 0.907 · z = -0.399

Equatorial (J2000)

RA 98.35110° · Dec -23.48609°

Galactic ℓ, b

232.322° · -14.234°

Ecliptic λ, β

101.175° · -46.602°

HTM-20 index

-1743016038