Key parameters at a glance

A radius of 15.24 Earth radii
A mass of 228.84 Earth masses
Surface gravity around 0.98 g
An orbital period of 2.138 days
Semi-major axis 0.0344 AU
Equilibrium temperature 1,865 K (1592 °C)
Distance from Earth 486.68 light-years
Earth Similarity Index 0.058
Travel time at Voyager 1 speed 8,582,547 years

WASP-74 b Planet Profile

Physical Specs

Radius

15.24 R⊕

Radius (Jupiter)

1.360 R♃

Mass

228.84 M⊕

Mass (Jupiter)

0.720 M♃

Density

0.37 g/cm³

Surface Gravity

0.98 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.058

HZ Position Inner

Controversial No

Discovery

Year 2015

Method Transit

Facility SuperWASP

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#213of 1771

top 12.0%

This planet

15.24R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Kepler-76 b 15.24 R⊕ TrES-2 b 15.24 R⊕ TOI-1516 b 15.24 R⊕

Metric	Earth	WASP-74 b	Jupiter
Radius (R⊕)	1.00	15.24	11.21
Mass (M⊕)	1.00	228.84	317.83
Density (g/cm³)	5.51	0.37	1.33
Surface Gravity (g)	1.00	0.98	2.53
Insolation (S⊕)	1.00	531.16	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	228.838 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 244089109

Gaia DR2

Gaia DR2 4224062406762625152

Gaia DR3

Gaia DR3 4224062406762625152

System

WASP-74

Percentile among Gas Giant cohort

Radius 15.244 R⊕ · percentile 88 / cohort 1771

Mass 228.838 M⊕ · percentile 24 / cohort 1747

Orbital period 2.14 d · percentile 8 / cohort 1533

Distance 149.22 pc · percentile 44 / cohort 1759

ESI 0.058 · percentile 8 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2.138 days

Semi-major axis

0.0344 AU

Eccentricity

0.000

Inclination

79.81 °

Year Length

A year here lasts approximately 2.14 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0344 AU.

Transit Fingerprint

Depth

0.960 %

Duration

2.292 h

Impact parameter b

0.860

Rp / R★

0.090340

Transit midpoint (BJD)

2,457,103.3260

Photometric dip

Transit produces a flux drop of 9,600 ppm lasting ≈ 2.29 h.

Extended Orbital Architecture

Planet / star radius ratio

0.090340

Semi-major axis / stellar radius

4.860

Impact parameter (b)

0.860

RV semi-amplitude (K)

114.100 m/s

Transit mid-time (BJD)

2,457,103.3260

Sky-projected obliquity (λ)

0.77°

Angular separation (arcsec)

0.23100

Eq. Temperature

1,865K

(1592 °C)

Insolation (S⊕)

531.16

Earth = 1.00

Earth Similarity (ESI)

0.058

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. 2015

Instrument

iKon-L CCD Camera

Publication

2015-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2015 at SuperWASP (5 shown).

WASP-89 b · Gas Giant WASP-83 b · Gas Giant WASP-135 b · Gas Giant WASP-20 b · Gas Giant WASP-82 b · Gas Giant

Host System: WASP-74

Spectral Class

F-type yellow-white

Effective Temperature

5,990 K — hotter than the Sun (5,778 K)

Estimated Age

3.49 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.420 R☉

Stellar Mass

0.980 M☉

Metallicity [Fe/H]

0.39

Extended Stellar Properties

Surface gravity (log g)

4.390 dex

Stellar density

0.480 g/cm³

Systemic radial velocity

-15.77 km/s

Rotational v·sin i

6.03 km/s

Metallicity ratio

[Fe/H]

Distance

149.22 parsec

Light-years 486.68 ly

V-band magnitude

9.75 mag

Voyager-speed travel 8,582,547 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

6.673 mas

Total Proper Motion

64.618 mas/yr

PM Right Ascension

1.35 mas/yr

PM Declination

-64.60 mas/yr

Galactic Cartesian (pc)

x = 0.567 · y = -0.824 · z = -0.019

Equatorial (J2000)

RA 304.53884° · Dec -1.07600°

Galactic ℓ, b

42.205° · -19.711°

Ecliptic λ, β

306.603° · 18.082°

HTM-20 index

986103624