Key parameters at a glance
- A radius of 17.15 Earth radii
- A mass of 270.15 Earth masses
- Surface gravity around 0.92 g
- An orbital period of 3.662 days
- Semi-major axis 0.0519 AU
- Equilibrium temperature 1,716 K (1443 °C)
- Distance from Earth 804.59 light-years
- Earth Similarity Index 0.048
- Travel time at Voyager 1 speed 14,189,019 years
WASP-79 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#104of 1771
top 5.8%
This planet
17.15R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-79 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 17.15 | 11.21 |
| Mass (M⊕) | 1.00 | 270.15 | 317.83 |
| Density (g/cm³) | 5.51 | 0.13 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.92 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,645.99 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 270.154 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 170634116
Gaia DR2
Gaia DR2 4884779765893739904
Gaia DR3
Gaia DR3 4884779765893739904
System
WASP-79
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.66 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0519 AU.
Transit Fingerprint
Depth
1.225 %
Duration
3.767 h
Impact parameter b
0.556
Rp / R★
0.104400
Transit midpoint (BJD)
2,458,160.1870
Photometric dip
Transit produces a flux drop of 12,254 ppm lasting ≈ 3.77 h.
Extended Orbital Architecture
Planet / star radius ratio
0.104400
Semi-major axis / stellar radius
7.407
Impact parameter (b)
0.556
RV semi-amplitude (K)
88.200 m/s
Transit mid-time (BJD)
2,458,160.1870
Long. of periastron (ω)
90.00°
Sky-projected obliquity (λ)
-95.20°
Angular separation (arcsec)
0.21000
Eq. Temperature
1,716K
(1443 °C)
Insolation (S⊕)
1,645.99
Earth = 1.00
Earth Similarity (ESI)
0.048
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
Smalley et al. 2012Instrument
iKon-L CCD Camera
Publication
2012-11
Observation locale
Ground
Discovery cohort
Planets confirmed in 2012 at SuperWASP (12 shown).
Host System: WASP-79
Spectral Class
F-type yellow-white
Effective Temperature
6,600 K — hotter than the Sun (5,778 K)
Estimated Age
1.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.510 R☉
Stellar Mass
1.390 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
4.200 dex
Stellar density
0.575 g/cm³
Systemic radial velocity
4.99 km/s
Rotational v·sin i
19.10 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.025 mas
Total Proper Motion
2.649 mas/yr
PM Right Ascension
-0.37 mas/yr
PM Declination
2.62 mas/yr
Galactic Cartesian (pc)
x = 0.345 · y = 0.789 · z = -0.509
Equatorial (J2000)
RA 66.37090° · Dec -30.60044°
Galactic ℓ, b
230.542° · -43.445°
Ecliptic λ, β
56.485° · -51.326°
HTM-20 index
1484646145
Observation Record
RV measurements
1
Transmission spectra
8
Emission spectra
7
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