Key parameters at a glance
- A radius of 14.01 Earth radii
- A mass of 311.47 Earth masses
- Surface gravity around 1.59 g
- An orbital period of 9.388 days
- Semi-major axis 0.0904 AU
- Equilibrium temperature 1,160 K (887 °C)
- Distance from Earth 911.12 light-years
- Earth Similarity Index 0.114
- Travel time at Voyager 1 speed 16,067,544 years
WASP-185 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#408of 1771
top 23.0%
This planet
14.01R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-185 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.01 | 11.21 |
| Mass (M⊕) | 1.00 | 311.47 | 317.83 |
| Density (g/cm³) | 5.51 | 0.66 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.59 | 2.53 |
| Insolation (S⊕) | 1.00 | 662.33 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 311.473 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 46020827
Gaia DR2
Gaia DR2 6284007337003799552
Gaia DR3
Gaia DR3 6284007337003799552
System
WASP-185
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 9.39 Earth days (2.6% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0904 AU.
Transit Fingerprint
Depth
0.730 %
Duration
4.608 h
Impact parameter b
0.810
Transit midpoint (BJD)
2,456,935.9820
Photometric dip
Transit produces a flux drop of 7,300 ppm lasting ≈ 4.61 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
12.900
Impact parameter (b)
0.810
RV semi-amplitude (K)
88.000 m/s
Transit mid-time (BJD)
2,456,935.9820
Long. of periastron (ω)
-42.00°
Angular separation (arcsec)
0.32400
Eq. Temperature
1,160K
(887 °C)
Insolation (S⊕)
662.33
Earth = 1.00
Earth Similarity (ESI)
0.114
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. 2019Instrument
iKon-L CCD Camera
Publication
2019-11
Observation locale
Ground
Discovery cohort
Planets confirmed in 2019 at WASP-South (9 shown).
Host System: WASP-185
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,900 K — hotter than the Sun (5,778 K)
Estimated Age
6.60 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.500 R☉
Stellar Mass
1.120 M☉
Metallicity [Fe/H]
-0.02
Extended Stellar Properties
Surface gravity (log g)
4.130 dex
Stellar density
0.470 g/cm³
Systemic radial velocity
23.87 km/s
Rotational v·sin i
2.80 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.552 mas
Total Proper Motion
14.709 mas/yr
PM Right Ascension
-13.40 mas/yr
PM Declination
-6.06 mas/yr
Galactic Cartesian (pc)
x = -0.781 · y = -0.528 · z = -0.335
Equatorial (J2000)
RA 214.05958° · Dec -19.54231°
Galactic ℓ, b
328.945° · 39.008°
Ecliptic λ, β
218.328° · -5.564°
HTM-20 index
1900764971
Similar Worlds
TOI-4465 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.01 R⊕ · 395.1 ly
OGLE-TR-10 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.01 R⊕ · 4,386.7 ly
HATS-32 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.00 R⊕ · 2,430.2 ly
HATS-29 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.02 R⊕ · 1,154.2 ly
HD 360 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.00 R⊕ · 363.8 ly
HD 211810 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.00 R⊕ · 210.8 ly