Key parameters at a glance
- A radius of 12.78 Earth radii
- A mass of 432.25 Earth masses
- Surface gravity around 2.65 g
- An orbital period of 2.073 days
- Semi-major axis 0.0330 AU
- Equilibrium temperature 1,555 K (1282 °C)
- Distance from Earth 492.72 light-years
- Earth Similarity Index 0.092
- Travel time at Voyager 1 speed 8,689,070 years
WASP-97 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1118of 1771
top 63.1%
This planet
12.78R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-97 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.78 | 11.21 |
| Mass (M⊕) | 1.00 | 432.25 | 317.83 |
| Density (g/cm³) | 5.51 | 1.21 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.65 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,414.87 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 432.249 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 230982885
Gaia DR2
Gaia DR2 4911563216311083392
Gaia DR3
Gaia DR3 4911563216311083392
System
WASP-97
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.07 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0330 AU.
Transit Fingerprint
Depth
1.200 %
Duration
2.582 h
Impact parameter b
0.400
Rp / R★
0.109300
Transit midpoint (BJD)
2,458,355.4904
Photometric dip
Transit produces a flux drop of 12,000 ppm lasting ≈ 2.58 h.
Extended Orbital Architecture
Planet / star radius ratio
0.109300
Semi-major axis / stellar radius
6.720
Impact parameter (b)
0.400
RV semi-amplitude (K)
194.500 m/s
Transit mid-time (BJD)
2,458,355.4904
Angular separation (arcsec)
0.21900
Eq. Temperature
1,555K
(1282 °C)
Insolation (S⊕)
1,414.87
Earth = 1.00
Earth Similarity (ESI)
0.092
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
Hellier et al. 2014Instrument
iKon-L CCD Camera
Publication
2014-05
Observation locale
Ground
Discovery cohort
Planets confirmed in 2014 at SuperWASP (12 shown).
Host System: WASP-97
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,640 K — cooler than the Sun (5,778 K)
Estimated Age
4.80 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.080 R☉
Stellar Mass
1.180 M☉
Metallicity [Fe/H]
0.23
Extended Stellar Properties
Surface gravity (log g)
4.450 dex
Stellar density
1.340 g/cm³
Systemic radial velocity
6.81 km/s
Rotational v·sin i
1.10 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
6.591 mas
Total Proper Motion
98.418 mas/yr
PM Right Ascension
96.16 mas/yr
PM Declination
20.95 mas/yr
Galactic Cartesian (pc)
x = 0.511 · y = 0.234 · z = -0.827
Equatorial (J2000)
RA 24.60514° · Dec -55.77200°
Galactic ℓ, b
289.641° · -60.127°
Ecliptic λ, β
347.428° · -58.401°
HTM-20 index
1936703412
Similar Worlds
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Gas Giant · G-type yellow (Sun-like)
Radius 12.78 R⊕ · 533.4 ly
TOI-1820 b
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XO-5 b
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Radius 12.78 R⊕ · 900.9 ly
HATS-57 b
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TOI-2295 c
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HD 75302 b
Gas Giant · G-type yellow (Sun-like)
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