Key parameters at a glance
- A radius of 15.69 Earth radii
- A mass of 390.93 Earth masses
- Surface gravity around 1.59 g
- An orbital period of 2.500 days
- Semi-major axis 0.0363 AU
- Equilibrium temperature 1,600 K (1327 °C)
- Distance from Earth 986.45 light-years
- Earth Similarity Index 0.078
- Travel time at Voyager 1 speed 17,396,085 years
WASP-119 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#180of 1771
top 10.1%
This planet
15.69R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-119 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.69 | 11.21 |
| Mass (M⊕) | 1.00 | 390.93 | 317.83 |
| Density (g/cm³) | 5.51 | 0.70 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.59 | 2.53 |
| Insolation (S⊕) | 1.00 | 907.86 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 390.931 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 388104525
Gaia DR2
Gaia DR2 4672607178880426624
Gaia DR3
Gaia DR3 4672607178880426624
System
WASP-119
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.50 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0363 AU.
Transit Fingerprint
Depth
1.462 %
Duration
3.024 h
Impact parameter b
0.500
Rp / R★
0.112700
Transit midpoint (BJD)
2,456,537.5470
Photometric dip
Transit produces a flux drop of 14,621 ppm lasting ≈ 3.02 h.
Extended Orbital Architecture
Planet / star radius ratio
0.112700
Semi-major axis / stellar radius
6.329
Impact parameter (b)
0.500
RV semi-amplitude (K)
181.000 m/s
Transit mid-time (BJD)
2,456,537.5470
Angular separation (arcsec)
0.12000
Eq. Temperature
1,600K
(1327 °C)
Insolation (S⊕)
907.86
Earth = 1.00
Earth Similarity (ESI)
0.078
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
Maxted et al. 2016Instrument
iKon-L CCD Camera
Publication
2016-06
Observation locale
Ground
Discovery cohort
Planets confirmed in 2016 at SuperWASP-South (11 shown).
Host System: WASP-119
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,650 K — cooler than the Sun (5,778 K)
Estimated Age
8.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.200 R☉
Stellar Mass
1.020 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
4.260 dex
Stellar density
0.760 g/cm³
Systemic radial velocity
8.40 km/s
Rotational v·sin i
0.70 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.278 mas
Total Proper Motion
26.832 mas/yr
PM Right Ascension
21.13 mas/yr
PM Declination
16.54 mas/yr
Galactic Cartesian (pc)
x = 0.235 · y = 0.348 · z = -0.908
Equatorial (J2000)
RA 55.93364° · Dec -65.19378°
Galactic ℓ, b
279.720° · -43.367°
Ecliptic λ, β
349.816° · -76.186°
HTM-20 index
-229270484
Similar Worlds
KELT-10 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.68 R⊕ · 614.5 ly
NGTS-27 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.65 R⊕ · 3,072.8 ly
WASP-113 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.79 R⊕ · 1,419.3 ly
HD 209458 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.58 R⊕ · 157.5 ly
WASP-63 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.80 R⊕ · 948.1 ly
HATS-51 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.80 R⊕ · 1,270.6 ly