Key parameters at a glance
- A radius of 20.78 Earth radii
- A mass of 284.14 Earth masses
- Surface gravity around 0.66 g
- An orbital period of 1.810 days
- Semi-major axis 0.0330 AU
- Equilibrium temperature 2,228 K (1955 °C)
- Distance from Earth 634.24 light-years
- Earth Similarity Index 0.037
- Travel time at Voyager 1 speed 11,184,816 years
WASP-76 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#27of 1771
top 1.5%
This planet
20.78R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-76 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 20.78 | 11.21 |
| Mass (M⊕) | 1.00 | 284.14 | 317.83 |
| Density (g/cm³) | 5.51 | 0.17 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.66 | 2.53 |
| Insolation (S⊕) | 1.00 | 4,104.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 284.139 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 289.224 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 293435336
Gaia DR2
Gaia DR2 2512326349403275520
Gaia DR3
Gaia DR3 2512326349403275520
System
WASP-76
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.81 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0330 AU.
Transit Fingerprint
Depth
1.178 %
Duration
3.800 h
Impact parameter b
0.027
Rp / R★
0.108520
Transit midpoint (BJD)
2,458,080.6262
Photometric dip
Transit produces a flux drop of 11,780 ppm lasting ≈ 3.80 h.
Extended Orbital Architecture
Planet / star radius ratio
0.108520
Semi-major axis / stellar radius
4.080
Impact parameter (b)
0.027
RV semi-amplitude (K)
116.020 m/s
Transit mid-time (BJD)
2,458,080.6262
Long. of periastron (ω)
51.00°
Sky-projected obliquity (λ)
61.28°
Angular separation (arcsec)
0.17000
Eq. Temperature
2,228K
(1955 °C)
Insolation (S⊕)
4,104.00
Earth = 1.00
Earth Similarity (ESI)
0.037
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
West et al. 2016Instrument
iKon-L CCD Camera
Publication
2016-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 2016 at SuperWASP (11 shown).
Host System: WASP-76
Spectral Class
F-type yellow-white
Effective Temperature
6,329 K — hotter than the Sun (5,778 K)
Estimated Age
1.82 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.756 R☉
Stellar Mass
1.458 M☉
Metallicity [Fe/H]
0.37
Extended Stellar Properties
Surface gravity (log g)
4.196 dex
Stellar density
0.399 g/cm³
Systemic radial velocity
-1.11 km/s
Rotational v·sin i
1.48 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
5.120 mas
Total Proper Motion
61.051 mas/yr
PM Right Ascension
45.40 mas/yr
PM Declination
-40.82 mas/yr
Galactic Cartesian (pc)
x = 0.893 · y = 0.448 · z = 0.047
Equatorial (J2000)
RA 26.63294° · Dec 2.70039°
Galactic ℓ, b
149.085° · -57.347°
Ecliptic λ, β
25.688° · -7.752°
HTM-20 index
-1381379508
Observation Record
Transmission spectra
7
Emission spectra
16
Archive notes
5
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