Key parameters at a glance
- A radius of 12.29 Earth radii
- A mass of 508.53 Earth masses
- Surface gravity around 3.37 g
- An orbital period of 2.345 days
- Semi-major axis 0.0337 AU
- Equilibrium temperature 1,422 K (1149 °C)
- Distance from Earth 996.74 light-years
- Earth Similarity Index 0.107
- Travel time at Voyager 1 speed 17,577,553 years
WASP-170 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1389of 1771
top 78.4%
This planet
12.29R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-170 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.29 | 11.21 |
| Mass (M⊕) | 1.00 | 508.53 | 317.83 |
| Density (g/cm³) | 5.51 | 1.60 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.37 | 2.53 |
| Insolation (S⊕) | 1.00 | 680.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 508.528 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 118956453
Gaia DR2
Gaia DR2 5656184406542140032
Gaia DR3
Gaia DR3 5656184406542140032
System
WASP-170
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.34 Earth days (0.6% of a terrestrial year) at a mean orbital distance of 0.0337 AU.
Transit Fingerprint
Depth
1.382 %
Duration
2.040 h
Impact parameter b
0.689
Rp / R★
0.117500
Transit midpoint (BJD)
2,457,802.3915
Photometric dip
Transit produces a flux drop of 13,820 ppm lasting ≈ 2.04 h.
Extended Orbital Architecture
Planet / star radius ratio
0.117500
Semi-major axis / stellar radius
7.710
Impact parameter (b)
0.689
RV semi-amplitude (K)
255.000 m/s
Transit mid-time (BJD)
2,457,802.3915
Angular separation (arcsec)
0.11000
Eq. Temperature
1,422K
(1149 °C)
Insolation (S⊕)
680.00
Earth = 1.00
Earth Similarity (ESI)
0.107
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
Barkaoui et al. 2019Instrument
iKon-L CCD Camera
Publication
2019-02
Observation locale
Ground
Discovery cohort
Planets confirmed in 2018 at SuperWASP-South (12 shown).
Host System: WASP-170
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,600 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.938 R☉
Stellar Mass
0.930 M☉
Metallicity [Fe/H]
0.22
Extended Stellar Properties
Surface gravity (log g)
4.466 dex
Stellar density
1.580 g/cm³
Systemic radial velocity
33.08 km/s
Rotational v·sin i
5.60 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.244 mas
Total Proper Motion
10.048 mas/yr
PM Right Ascension
-9.98 mas/yr
PM Declination
1.13 mas/yr
Galactic Cartesian (pc)
x = -0.666 · y = 0.657 · z = -0.354
Equatorial (J2000)
RA 135.41630° · Dec -20.72037°
Galactic ℓ, b
247.559° · 16.656°
Ecliptic λ, β
145.275° · -35.857°
HTM-20 index
-148507608
Similar Worlds
Qatar-3 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.29 R⊕ · 2,399.2 ly
TOI-3976 A b
Gas Giant · G-type yellow (Sun-like)
Radius 12.27 R⊕ · 1,683.2 ly
Kepler-30 c
Gas Giant · G-type yellow (Sun-like)
Radius 12.30 R⊕ · 2,981.8 ly
HAT-P-13 c
Gas Giant · G-type yellow (Sun-like)
Radius 12.30 R⊕ · 805.0 ly
HD 39091 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.30 R⊕ · 59.6 ly
GJ 2030 c
Gas Giant · G-type yellow (Sun-like)
Radius 12.30 R⊕ · 120.9 ly