Key parameters at a glance
- A radius of 11.20 Earth radii
- A mass of 170.99 Earth masses
- Surface gravity around 1.36 g
- An orbital period of 3.068 days
- Semi-major axis 0.0344 AU
- Equilibrium temperature 825 K (552 °C)
- Distance from Earth 162.39 light-years
- Earth Similarity Index 0.178
- Travel time at Voyager 1 speed 2,863,664 years
- Almost certainly tidally locked to its host star given the close orbit
WASP-80 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1639of 1771
top 92.5%
This planet
11.20R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-80 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.20 | 11.21 |
| Mass (M⊕) | 1.00 | 170.99 | 317.83 |
| Density (g/cm³) | 5.51 | 0.72 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.36 | 2.53 |
| Insolation (S⊕) | 1.00 | 72.44 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 170.993 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 243921117
Gaia DR2
Gaia DR2 4223507222112425344
Gaia DR3
Gaia DR3 4223507222112425344
System
WASP-80
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.07 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0344 AU.
Transit Fingerprint
Depth
2.937 %
Duration
2.131 h
Impact parameter b
0.215
Rp / R★
0.171370
Transit midpoint (BJD)
2,456,487.4250
Photometric dip
Transit produces a flux drop of 29,370 ppm lasting ≈ 2.13 h.
Extended Orbital Architecture
Planet / star radius ratio
0.171370
Semi-major axis / stellar radius
12.630
Impact parameter (b)
0.215
RV semi-amplitude (K)
109.000 m/s
Occultation depth
0.046 ppm
Transit mid-time (BJD)
2,456,487.4250
Long. of periastron (ω)
94.00°
Sky-projected obliquity (λ)
-14.00°
Angular separation (arcsec)
0.69100
Eq. Temperature
825K
(552 °C)
Insolation (S⊕)
72.44
Earth = 1.00
Earth Similarity (ESI)
0.178
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
Triaud et al. 2013Instrument
iKon-L CCD Camera
Publication
2013-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2012 at SuperWASP (12 shown).
Host System: WASP-80
Spectral Class
K-type orange
Effective Temperature
4,143 K — cooler than the Sun (5,778 K)
Estimated Age
7.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.586 R☉
Stellar Mass
0.577 M☉
Metallicity [Fe/H]
-0.13
Extended Stellar Properties
Surface gravity (log g)
4.663 dex
Stellar density
4.050 g/cm³
Systemic radial velocity
10.20 km/s
Rotational v·sin i
1.27 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
20.057 mas
Total Proper Motion
142.014 mas/yr
PM Right Ascension
-132.76 mas/yr
PM Declination
-50.43 mas/yr
Galactic Cartesian (pc)
x = 0.547 · y = -0.836 · z = -0.037
Equatorial (J2000)
RA 303.16680° · Dec -2.14444°
Galactic ℓ, b
40.519° · -19.009°
Ecliptic λ, β
304.941° · 17.362°
HTM-20 index
1061024529
Similar Worlds
WASP-162 b
Gas Giant · K-type orange
Radius 11.21 R⊕ · 1,013.8 ly
WASP-69 b
Gas Giant · K-type orange
Radius 11.21 R⊕ · 162.9 ly
HAT-P-18 b
Gas Giant · K-type orange
Radius 11.15 R⊕ · 526.4 ly
TOI-2537 b
Gas Giant · K-type orange
Radius 11.25 R⊕ · 603.3 ly
TOI-1811 b
Gas Giant · K-type orange
Radius 11.14 R⊕ · 418.2 ly
XO-2 N b
Gas Giant · K-type orange
Radius 11.13 R⊕ · 503.2 ly