Key parameters at a glance
- A radius of 12.11 Earth radii
- A mass of 1,001.12 Earth masses
- Surface gravity around 6.83 g
- An orbital period of 3.093 days
- Semi-major axis 0.0378 AU
- Equilibrium temperature 1,370 K (1097 °C)
- Distance from Earth 459.87 light-years
- Earth Similarity Index 0.127
- Travel time at Voyager 1 speed 8,109,868 years
- Almost certainly tidally locked to its host star given the close orbit
WASP-10 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1450of 1771
top 81.8%
This planet
12.11R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-10 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.11 | 11.21 |
| Mass (M⊕) | 1.00 | 1,001.12 | 317.83 |
| Density (g/cm³) | 5.51 | 4.14 | 1.33 |
| Surface Gravity (g) | 1.00 | 6.83 | 2.53 |
| Insolation (S⊕) | 1.00 | 174.03 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,001.120 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 431701493
Gaia DR2
Gaia DR2 1909762228985058944
Gaia DR3
Gaia DR3 1909762228985058944
System
WASP-10
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.09 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0378 AU.
Transit Fingerprint
Depth
2.525 %
Duration
2.227 h
Impact parameter b
0.299
Rp / R★
0.159180
Transit midpoint (BJD)
2,454,664.0373
Photometric dip
Transit produces a flux drop of 25,250 ppm lasting ≈ 2.23 h.
Extended Orbital Architecture
Planet / star radius ratio
0.159180
Semi-major axis / stellar radius
11.650
Impact parameter (b)
0.299
RV semi-amplitude (K)
533.100 m/s
Transit mid-time (BJD)
2,454,664.0373
Long. of periastron (ω)
165.60°
Angular separation (arcsec)
0.26800
Eq. Temperature
1,370K
(1097 °C)
Insolation (S⊕)
174.03
Earth = 1.00
Earth Similarity (ESI)
0.127
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.
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
Christian et al. 2009Instrument
iKon-L CCD Camera
Publication
2009-02
Observation locale
Ground
Discovery cohort
Planets confirmed in 2008 at SuperWASP (5 shown).
Host System: WASP-10
Spectral Class
K-type orange
Effective Temperature
4,675 K — cooler than the Sun (5,778 K)
Estimated Age
7.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.698 R☉
Stellar Mass
0.750 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
4.627 dex
Stellar density
2.130 g/cm³
Systemic radial velocity
-11.44 km/s
Rotational v·sin i
3.00 km/s
Rotation period
11.91 days
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
7.064 mas
Total Proper Motion
35.624 mas/yr
PM Right Ascension
25.11 mas/yr
PM Declination
-25.27 mas/yr
Galactic Cartesian (pc)
x = 0.837 · y = -0.163 · z = 0.522
Equatorial (J2000)
RA 348.99305° · Dec 31.46275°
Galactic ℓ, b
100.112° · -27.144°
Ecliptic λ, β
3.972° · 32.933°
HTM-20 index
1843516215
Observation Record
Photometric series
23
RV measurements
2
Transmission spectra
1
Emission spectra
6
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