Key parameters at a glance

A radius of 16.11 Earth radii
A mass of 104.88 Earth masses
Surface gravity around 0.40 g
An orbital period of 4.234 days
Semi-major axis 0.0550 AU
Equilibrium temperature 1,528 K (1255 °C)
Distance from Earth 1,337.73 light-years
Earth Similarity Index 0.060
Travel time at Voyager 1 speed 23,590,789 years

WASP-174 b Planet Profile

Physical Specs

Radius

16.11 R⊕

Radius (Jupiter)

1.437 R♃

Mass

104.88 M⊕

Mass (Jupiter)

0.330 M♃

Density

0.14 g/cm³

Surface Gravity

0.40 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.060

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

#155of 1771

top 8.7%

This planet

16.11R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-4153 b 16.12 R⊕ TOI-2346 b 16.12 R⊕ CoRoT-12 b 16.14 R⊕

Metric	Earth	WASP-174 b	Jupiter
Radius (R⊕)	1.00	16.11	11.21
Mass (M⊕)	1.00	104.88	317.83
Density (g/cm³)	5.51	0.14	1.33
Surface Gravity (g)	1.00	0.40	2.53
Insolation (S⊕)	1.00	901.90	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	104.883 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 102192004

Gaia DR2

Gaia DR2 6139403450370668800

Gaia DR3

Gaia DR3 6139403450370668800

System

WASP-174

Percentile among Gas Giant cohort

Radius 16.107 R⊕ · percentile 91 / cohort 1771

Mass 104.883 M⊕ · percentile 6 / cohort 1747

Orbital period 4.23 d · percentile 32 / cohort 1533

Distance 410.15 pc · percentile 70 / cohort 1759

ESI 0.060 · percentile 9 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4.234 days

Semi-major axis

0.0550 AU

Eccentricity

0.000

Inclination

83.78 °

Year Length

A year here lasts approximately 4.23 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

0.860 %

Duration

2.094 h

Impact parameter b

0.953

Rp / R★

0.109800

Transit midpoint (BJD)

2,458,545.5266

Photometric dip

Transit produces a flux drop of 8,600 ppm lasting ≈ 2.09 h.

Extended Orbital Architecture

Planet / star radius ratio

0.109800

Semi-major axis / stellar radius

8.789

Impact parameter (b)

0.953

RV semi-amplitude (K)

36.100 m/s

Transit mid-time (BJD)

2,458,545.5266

Sky-projected obliquity (λ)

31.00°

Angular separation (arcsec)

0.13400

Eq. Temperature

1,528K

(1255 °C)

Insolation (S⊕)

901.90

Earth = 1.00

Earth Similarity (ESI)

0.060

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

Temple et al. 2018

Instrument

iKon-L CCD Camera

Publication

2018-11

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-174

Spectral Class

F-type yellow-white

Effective Temperature

6,399 K — hotter than the Sun (5,778 K)

Estimated Age

2.20 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.347 R☉

Stellar Mass

1.240 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.273 dex

Stellar density

0.716 g/cm³

Systemic radial velocity

5.92 km/s

Rotational v·sin i

16.24 km/s

Metallicity ratio

[Fe/H]

Distance

410.15 parsec

Light-years 1,337.73 ly

V-band magnitude

11.80 mag

Voyager-speed travel 23,590,789 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

2.411 mas

Total Proper Motion

5.784 mas/yr

PM Right Ascension

0.04 mas/yr

PM Declination

-5.78 mas/yr

Galactic Cartesian (pc)

x = -0.722 · y = -0.204 · z = -0.661

Equatorial (J2000)

RA 195.79401° · Dec -41.38486°

Galactic ℓ, b

305.297° · 21.433°

Ecliptic λ, β

211.951° · -31.690°

HTM-20 index

-1180918134