Key parameters at a glance
- A radius of 1.95 Earth radii
- A mass of 15.20 Earth masses
- Surface gravity around 4.00 g
- An orbital period of 1.447 days
- Semi-major axis 0.0236 AU
- Equilibrium temperature 1,329 K (1056 °C)
- Distance from Earth 328.07 light-years
- Earth Similarity Index 0.179
- 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 c 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 this | Super-Earth | 1.95 | 15.20 | 1.447 | 1,329 | 2023 |
| WASP-84 b | Gas Giant | 10.72 | 220.00 | 8.523 | 732 | 2014 |
WASP-84 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#67of 1176
top 5.6%
This planet
1.95R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | WASP-84 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.95 | 11.21 |
| Mass (M⊕) | 1.00 | 15.20 | 317.83 |
| Density (g/cm³) | 5.51 | 11.20 | 1.33 |
| Surface Gravity (g) | 1.00 | 4.00 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,452.18 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 15.200 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 Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.45 Earth days (0.4% of a terrestrial year) at a mean orbital distance of 0.0236 AU.
Transit Fingerprint
Depth
0.053 %
Duration
1.111 h
Impact parameter b
0.785
Rp / R★
0.023300
Transit midpoint (BJD)
2,457,952.4543
Photometric dip
Transit produces a flux drop of 532 ppm lasting ≈ 1.11 h.
Extended Orbital Architecture
Planet / star radius ratio
0.023300
Semi-major axis / stellar radius
6.610
Impact parameter (b)
0.785
RV semi-amplitude (K)
9.500 m/s
Transit mid-time (BJD)
2,457,952.4543
Angular separation (arcsec)
0.23500
Eq. Temperature
1,329K
(1056 °C)
Insolation (S⊕)
1,452.18
Earth = 1.00
Earth Similarity (ESI)
0.179
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. 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
Maciejewski et al. 2023Instrument
TESS CCD Array
Publication
2023-06
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (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
K2-285 e
Super-Earth · K-type orange
Radius 1.95 R⊕ · 505.4 ly
Kepler-62 d
Super-Earth · K-type orange
Radius 1.95 R⊕ · 981.3 ly
Kepler-330 c
Super-Earth · K-type orange
Radius 1.95 R⊕ · 2,340.3 ly
K2-368 d
Super-Earth · K-type orange
Radius 1.95 R⊕ · 673.9 ly
TOI-1739 b
Super-Earth · K-type orange
Radius 1.95 R⊕ · 231.5 ly
Kepler-1600 c
Super-Earth · K-type orange
Radius 1.94 R⊕ · 3,362.0 ly