Key parameters at a glance
- A radius of 15.92 Earth radii
- A mass of 908.99 Earth masses
- Surface gravity around 3.59 g
- An orbital period of 4.087 days
- Semi-major axis 0.0551 AU
- Equilibrium temperature 1,790 K (1517 °C)
- Distance from Earth 1,032.86 light-years
- Earth Similarity Index 0.077
- Travel time at Voyager 1 speed 18,214,561 years
WASP-73 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#166of 1771
top 9.3%
This planet
15.92R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-73 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.92 | 11.21 |
| Mass (M⊕) | 1.00 | 908.99 | 317.83 |
| Density (g/cm³) | 5.51 | 1.60 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.59 | 2.53 |
| Insolation (S⊕) | 1.00 | 2,242.36 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 908.994 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 202678
TIC
TIC 231670397
Gaia DR2
Gaia DR2 6453566701615683456
Gaia DR3
Gaia DR3 6453566701615683456
System
WASP-73
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.09 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0551 AU.
Transit Fingerprint
Depth
0.330 %
Duration
5.586 h
Impact parameter b
0.499
Rp / R★
0.058000
Transit midpoint (BJD)
2,458,462.5549
Photometric dip
Transit produces a flux drop of 3,300 ppm lasting ≈ 5.59 h.
Extended Orbital Architecture
Planet / star radius ratio
0.058000
Semi-major axis / stellar radius
5.750
Impact parameter (b)
0.499
RV semi-amplitude (K)
196.300 m/s
Transit mid-time (BJD)
2,458,462.5549
Angular separation (arcsec)
0.17400
Eq. Temperature
1,790K
(1517 °C)
Insolation (S⊕)
2,242.36
Earth = 1.00
Earth Similarity (ESI)
0.077
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
Delrez et al. 2014Instrument
iKon-L CCD Camera
Publication
2014-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2014 at SuperWASP (12 shown).
Host System: WASP-73
Spectral Class
F-type yellow-white
Effective Temperature
6,030 K — hotter than the Sun (5,778 K)
Estimated Age
4.30 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
2.550 R☉
Stellar Mass
2.520 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
3.930 dex
Stellar density
0.210 g/cm³
Systemic radial velocity
11.06 km/s
Rotational v·sin i
6.10 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.129 mas
Total Proper Motion
14.998 mas/yr
PM Right Ascension
10.55 mas/yr
PM Declination
-10.66 mas/yr
Galactic Cartesian (pc)
x = 0.404 · y = -0.340 · z = -0.849
Equatorial (J2000)
RA 319.94970° · Dec -58.14893°
Galactic ℓ, b
337.503° · -42.110°
Ecliptic λ, β
301.879° · -40.110°
HTM-20 index
-1199812313
Similar Worlds
HAT-P-14 b
Gas Giant · F-type yellow-white
Radius 15.92 R⊕ · 726.2 ly
WASP-3 b
Gas Giant · F-type yellow-white
Radius 15.92 R⊕ · 753.9 ly
Kepler-8 b
Gas Giant · F-type yellow-white
Radius 15.87 R⊕ · 3,332.9 ly
TOI-3523 A b
Gas Giant · F-type yellow-white
Radius 15.97 R⊕ · 2,104.7 ly
KELT-16 b
Gas Giant · F-type yellow-white
Radius 15.86 R⊕ · 1,450.0 ly
K2-107 b
Gas Giant · F-type yellow-white
Radius 15.98 R⊕ · 2,234.8 ly