Key parameters at a glance
- A radius of 13.05 Earth radii
- A mass of 187.51 Earth masses
- Surface gravity around 1.10 g
- An orbital period of 3.713 days
- Semi-major axis 0.0485 AU
- Equilibrium temperature 1,387 K (1114 °C)
- Distance from Earth 725.22 light-years
- Earth Similarity Index 0.091
- Travel time at Voyager 1 speed 12,789,328 years
WASP-70 A b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#956of 1771
top 53.9%
This planet
13.05R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-70 A b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.05 | 11.21 |
| Mass (M⊕) | 1.00 | 187.51 | 317.83 |
| Density (g/cm³) | 5.51 | 0.50 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.10 | 2.53 |
| Insolation (S⊕) | 1.00 | 649.15 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 187.512 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 358155
TIC
TIC 442530946
Gaia DR2
Gaia DR2 6888469489370835840
Gaia DR3
Gaia DR3 6888469489370835840
System
WASP-70
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.71 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0485 AU.
Transit Fingerprint
Depth
0.970 %
Duration
3.334 h
Impact parameter b
0.431
Rp / R★
0.098500
Transit midpoint (BJD)
2,455,736.5035
Photometric dip
Transit produces a flux drop of 9,700 ppm lasting ≈ 3.33 h.
Extended Orbital Architecture
Planet / star radius ratio
0.098500
Semi-major axis / stellar radius
8.580
Impact parameter (b)
0.431
RV semi-amplitude (K)
72.300 m/s
Transit mid-time (BJD)
2,455,736.5035
Angular separation (arcsec)
0.21800
Eq. Temperature
1,387K
(1114 °C)
Insolation (S⊕)
649.15
Earth = 1.00
Earth Similarity (ESI)
0.091
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
Anderson et al. 2014Instrument
iKon-L CCD Camera
Publication
2014-12
Observation locale
Ground
Discovery cohort
Planets confirmed in 2014 at SuperWASP (12 shown).
Host System: WASP-70 A
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,763 K — cooler than the Sun (5,778 K)
Estimated Age
9.50 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.215 R☉
Stellar Mass
1.106 M☉
Metallicity [Fe/H]
-0.01
Extended Stellar Properties
Surface gravity (log g)
4.314 dex
Stellar density
0.872 g/cm³
Systemic radial velocity
-65.39 km/s
Rotational v·sin i
1.80 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.470 mas
Total Proper Motion
53.479 mas/yr
PM Right Ascension
44.24 mas/yr
PM Declination
-30.04 mas/yr
Galactic Cartesian (pc)
x = 0.693 · y = -0.682 · z = -0.232
Equatorial (J2000)
RA 315.47719° · Dec -13.43338°
Galactic ℓ, b
35.190° · -34.927°
Ecliptic λ, β
313.995° · 3.333°
HTM-20 index
165984719
Similar Worlds
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Radius 13.07 R⊕ · 602.9 ly
TOI-3688 A b
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WASP-37 b
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HD 195019 b
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MOA-2022-BLG-091L b
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Radius 13.00 R⊕ · 13,861.6 ly
HD 47186 c
Gas Giant · G-type yellow (Sun-like)
Radius 13.00 R⊕ · 122.2 ly