Key parameters at a glance
- A radius of 10.72 Earth radii
- A mass of 220.00 Earth masses
- Surface gravity around 1.91 g
- An orbital period of 8.523 days
- Semi-major axis 0.0778 AU
- Equilibrium temperature 732 K (459 °C)
- Distance from Earth 328.07 light-years
- Earth Similarity Index 0.213
- Travel time at Voyager 1 speed 5,785,581 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around WASP-84
WASP-84 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| WASP-84 c | Super-Earth | 1.95 | 15.20 | 1.447 | 1,329 | 2023 |
| WASP-84 b this | Gas Giant | 10.72 | 220.00 | 8.523 | 732 | 2014 |
WASP-84 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1705of 1771
top 96.2%
This planet
10.72R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-84 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.72 | 11.21 |
| Mass (M⊕) | 1.00 | 220.00 | 317.83 |
| Density (g/cm³) | 5.51 | 0.98 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.91 | 2.53 |
| Insolation (S⊕) | 1.00 | 34.70 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 220.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 350293646
Gaia DR2
Gaia DR2 3078836109158636928
Gaia DR3
Gaia DR3 3078836109158636928
System
WASP-84
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.52 Earth days (2.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0778 AU.
Transit Fingerprint
Depth
1.723 %
Duration
2.760 h
Impact parameter b
0.649
Rp / R★
0.127930
Transit midpoint (BJD)
2,457,956.7119
Photometric dip
Transit produces a flux drop of 17,230 ppm lasting ≈ 2.76 h.
Extended Orbital Architecture
Planet / star radius ratio
0.127930
Semi-major axis / stellar radius
21.780
Impact parameter (b)
0.649
RV semi-amplitude (K)
76.800 m/s
Transit mid-time (BJD)
2,457,956.7119
Sky-projected obliquity (λ)
-0.30°
True obliquity (ψ)
17.30°
Angular separation (arcsec)
0.77300
Eq. Temperature
732K
(459 °C)
Insolation (S⊕)
34.70
Earth = 1.00
Earth Similarity (ESI)
0.213
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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
Anderson et al. 2014Instrument
iKon-L CCD Camera
Publication
2014-12
Observation locale
Ground
Discovery cohort
Planets confirmed in 2014 at SuperWASP (12 shown).
Host System: WASP-84
Spectral Class
K-type orange
Effective Temperature
5,280 K — cooler than the Sun (5,778 K)
Estimated Age
2.10 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.768 R☉
Stellar Mass
0.853 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.598 dex
Stellar density
2.653 g/cm³
Systemic radial velocity
-11.58 km/s
Rotational v·sin i
2.56 km/s
Rotation period
14.36 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
9.913 mas
Total Proper Motion
39.411 mas/yr
PM Right Ascension
-23.48 mas/yr
PM Declination
-31.65 mas/yr
Galactic Cartesian (pc)
x = -0.657 · y = 0.753 · z = 0.032
Equatorial (J2000)
RA 131.10700° · Dec 1.85989°
Galactic ℓ, b
224.911° · 25.836°
Ecliptic λ, β
133.030° · -15.651°
HTM-20 index
-998274421
Similar Worlds
IRAS 04125+2902 b
Gas Giant · K-type orange
Radius 10.74 R⊕ · 519.4 ly
HAT-P-12 b
Gas Giant · K-type orange
Radius 10.75 R⊕ · 465.6 ly
Kepler-975 c
Gas Giant · K-type orange
Radius 10.69 R⊕ · 1,389.7 ly
HATS-22 b
Gas Giant · K-type orange
Radius 10.68 R⊕ · 748.6 ly
WASP-154 b
Gas Giant · K-type orange
Radius 10.76 R⊕ · 702.9 ly
WASP-105 b
Gas Giant · K-type orange
Radius 10.76 R⊕ · 552.1 ly