Key parameters at a glance
- A radius of 15.80 Earth radii
- A mass of 851.78 Earth masses
- Surface gravity around 3.41 g
- An orbital period of 3.856 days
- Semi-major axis 0.0521 AU
- Equilibrium temperature 1,624 K (1351 °C)
- Distance from Earth 1,593.79 light-years
- Earth Similarity Index 0.085
- Travel time at Voyager 1 speed 28,106,554 years
WASP-61 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#174of 1771
top 9.8%
This planet
15.80R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-61 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.80 | 11.21 |
| Mass (M⊕) | 1.00 | 851.78 | 317.83 |
| Density (g/cm³) | 5.51 | 1.42 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.41 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,062.03 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 851.784 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 13021029
Gaia DR2
Gaia DR2 2959177048983750016
Gaia DR3
Gaia DR3 2959177048983750016
System
WASP-61
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.86 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0521 AU.
Transit Fingerprint
Depth
0.880 %
Duration
3.950 h
Impact parameter b
0.100
Rp / R★
0.093800
Transit midpoint (BJD)
2,457,128.1189
Photometric dip
Transit produces a flux drop of 8,800 ppm lasting ≈ 3.95 h.
Extended Orbital Architecture
Planet / star radius ratio
0.093800
Semi-major axis / stellar radius
8.150
Impact parameter (b)
0.100
RV semi-amplitude (K)
233.000 m/s
Transit mid-time (BJD)
2,457,128.1189
Sky-projected obliquity (λ)
4.00°
Angular separation (arcsec)
0.10700
Eq. Temperature
1,624K
(1351 °C)
Insolation (S⊕)
1,062.03
Earth = 1.00
Earth Similarity (ESI)
0.085
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. 2012Instrument
iKon-L CCD Camera
Publication
2012-10
Observation locale
Ground
Discovery cohort
Planets confirmed in 2012 at SuperWASP (12 shown).
Host System: WASP-61
Spectral Class
F-type yellow-white
Effective Temperature
6,250 K — hotter than the Sun (5,778 K)
Estimated Age
2.70 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.550 R☉
Stellar Mass
1.820 M☉
Metallicity [Fe/H]
-0.10
Extended Stellar Properties
Surface gravity (log g)
4.260 dex
Stellar density
0.690 g/cm³
Systemic radial velocity
18.90 km/s
Rotational v·sin i
10.30 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.018 mas
Total Proper Motion
3.208 mas/yr
PM Right Ascension
0.49 mas/yr
PM Declination
3.17 mas/yr
Galactic Cartesian (pc)
x = 0.228 · y = 0.869 · z = -0.439
Equatorial (J2000)
RA 75.29966° · Dec -26.05414°
Galactic ℓ, b
227.121° · -34.765°
Ecliptic λ, β
69.884° · -48.472°
HTM-20 index
-695753707
Similar Worlds
WASP-15 b
Gas Giant · F-type yellow-white
Radius 15.80 R⊕ · 920.1 ly
CoRoT-36 b
Gas Giant · F-type yellow-white
Radius 15.80 R⊕ · 3,020.1 ly
HATS-66 b
Gas Giant · F-type yellow-white
Radius 15.82 R⊕ · 4,820.5 ly
KELT-16 b
Gas Giant · F-type yellow-white
Radius 15.86 R⊕ · 1,450.0 ly
Kepler-8 b
Gas Giant · F-type yellow-white
Radius 15.87 R⊕ · 3,332.9 ly
HAT-P-8 b
Gas Giant · F-type yellow-white
Radius 15.69 R⊕ · 690.0 ly