Key parameters at a glance

A radius of 16.70 Earth radii
A mass of 1,274.44 Earth masses
Surface gravity around 4.57 g
An orbital period of 3.352 days
Semi-major axis 0.0470 AU
Equilibrium temperature 1,500 K (1227 °C)
Distance from Earth 7,651.65 light-years
Earth Similarity Index 0.093
Travel time at Voyager 1 speed 134,936,882 years

WTS-1 b Planet Profile

Physical Specs

Radius

16.70 R⊕

Radius (Jupiter)

1.490 R♃

Mass

1,274.44 M⊕

Mass (Jupiter)

4.010 M♃

Density

1.61 g/cm³

Surface Gravity

4.57 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.093

HZ Position Unknown

Controversial No

Discovery

Year 2012

Method Transit

Facility United Kingdom Infrared Telescope

Telescope 3.8 m United Kingdom Infrared Telescope

Size rank in cohort

Rank by radius

#123of 1771

top 6.9%

This planet

16.70R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

CoRoT-1 b 16.70 R⊕ TOI-1431 b 16.70 R⊕ TOI-163 b 16.69 R⊕

Metric	Earth	WTS-1 b	Jupiter
Radius (R⊕)	1.00	16.70	11.21
Mass (M⊕)	1.00	1,274.44	317.83
Density (g/cm³)	5.51	1.61	1.33
Surface Gravity (g)	1.00	4.57	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,274.440 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 138488806

Gaia DR2

Gaia DR2 2048464796206336896

Gaia DR3

Gaia DR3 2048464796210957440

System

WTS-1

Percentile among Gas Giant cohort

Radius 16.700 R⊕ · percentile 93 / cohort 1771

Mass 1,274.440 M⊕ · percentile 72 / cohort 1747

Orbital period 3.35 d · percentile 21 / cohort 1533

Distance 2,346.01 pc · percentile 90 / cohort 1759

ESI 0.093 · percentile 24 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.352 days

Semi-major axis

0.0470 AU

Eccentricity

0.100

Inclination

85.50 °

Year Length

A year here lasts approximately 3.35 Earth days (0.9% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0470 AU.

Transit Fingerprint

Depth

1.764 %

Impact parameter b

0.690

Rp / R★

0.132800

Transit midpoint (BJD)

2,454,318.7472

Photometric dip

Transit produces a flux drop of 17,636 ppm.

Extended Orbital Architecture

Planet / star radius ratio

0.132800

Impact parameter (b)

0.690

Transit mid-time (BJD)

2,454,318.7472

Angular separation (arcsec)

0.02000

Eq. Temperature

1,500K

(1227 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.093

0 = alien, 1 = Earth-identical

Insufficient insolation data — 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

Cappetta et al. 2012

Instrument

WFCam Wide Field Camera

Publication

2012-12

Observation locale

Ground

Host System: WTS-1

Spectral Class

F-type yellow-white

Effective Temperature

6,250 K — hotter than the Sun (5,778 K)

Estimated Age

2.55 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.150 R☉

Stellar Mass

1.200 M☉

Metallicity [Fe/H]

-0.50

Extended Stellar Properties

Surface gravity (log g)

4.400 dex

Stellar density

1.113 g/cm³

Rotational v·sin i

7.00 km/s

Metallicity ratio

[Fe/H]

Distance

2,346.01 parsec

Light-years 7,651.65 ly

V-band magnitude

16.64 mag

Voyager-speed travel 134,936,882 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

0.403 mas

Total Proper Motion

9.236 mas/yr

PM Right Ascension

-2.43 mas/yr

PM Declination

-8.91 mas/yr

Galactic Cartesian (pc)

x = 0.328 · y = -0.736 · z = 0.592

Equatorial (J2000)

RA 293.98503° · Dec 36.29629°

Galactic ℓ, b

70.016° · 7.557°

Ecliptic λ, β

306.659° · 56.723°

HTM-20 index

89335519