Key parameters at a glance
- A radius of 9.42 Earth radii
- A mass of 1,366.67 Earth masses
- Surface gravity around 15.42 g
- An orbital period of 9.243 days
- Semi-major axis 0.0900 AU
- Equilibrium temperature 1,024 K (751 °C)
- Distance from Earth 2,752.96 light-years
- Earth Similarity Index 0.168
- Travel time at Voyager 1 speed 48,548,369 years
1 sibling around CoRoT-20
CoRoT-20 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| CoRoT-20 b this | Neptune-like | 9.42 | 1,366.67 | 9.243 | 1,024 | 2011 |
| CoRoT-20 c | Gas Giant | 12.20 | 5,403.11 | 1,675.000 | — | 2018 |
CoRoT-20 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#48of 574
top 8.2%
This planet
9.42R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | CoRoT-20 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 9.42 | 11.21 |
| Mass (M⊕) | 1.00 | 1,366.67 | 317.83 |
| Density (g/cm³) | 5.51 | 8.87 | 1.33 |
| Surface Gravity (g) | 1.00 | 15.42 | 2.53 |
| Insolation (S⊕) | 1.00 | 180.87 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,366.669 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 234825296
Gaia DR2
Gaia DR2 3120122805143587328
Gaia DR3
Gaia DR3 3120122805143587328
System
CoRoT-20
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 9.24 Earth days (2.5% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0900 AU.
Transit Fingerprint
Depth
1.088 %
Duration
2.225 h
Impact parameter b
0.260
Rp / R★
0.084200
Transit midpoint (BJD)
2,455,266.0001
Photometric dip
Transit produces a flux drop of 10,880 ppm lasting ≈ 2.22 h.
Extended Orbital Architecture
Planet / star radius ratio
0.084200
Semi-major axis / stellar radius
18.950
Impact parameter (b)
0.260
RV semi-amplitude (K)
467.000 m/s
Transit mid-time (BJD)
2,455,266.0001
Long. of periastron (ω)
60.10°
Angular separation (arcsec)
0.10700
Eq. Temperature
1,024K
(751 °C)
Insolation (S⊕)
180.87
Earth = 1.00
Earth Similarity (ESI)
0.168
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
Deleuil et al. 2012Instrument
CoRoT CCD Array
Publication
2012-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2011 at CoRoT (5 shown).
Host System: CoRoT-20
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,880 K — hotter than the Sun (5,778 K)
Estimated Age
0.10 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.020 R☉
Stellar Mass
1.140 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
4.350 dex
Stellar density
1.510 g/cm³
Systemic radial velocity
60.62 km/s
Rotational v·sin i
4.50 km/s
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
1.157 mas
Total Proper Motion
2.816 mas/yr
PM Right Ascension
-0.26 mas/yr
PM Declination
-2.80 mas/yr
Galactic Cartesian (pc)
x = -0.134 · y = 0.991 · z = 0.004
Equatorial (J2000)
RA 97.72042° · Dec 0.22689°
Galactic ℓ, b
210.381° · -4.469°
Ecliptic λ, β
98.387° · -22.988°
HTM-20 index
-1653671891
Similar Worlds
HD 10180 h
Neptune-like · G-type yellow (Sun-like)
Radius 9.40 R⊕ · 127.1 ly
WASP-126 c
Neptune-like · G-type yellow (Sun-like)
Radius 9.38 R⊕ · 706.2 ly
HD 24040 c
Neptune-like · G-type yellow (Sun-like)
Radius 9.35 R⊕ · 152.1 ly
K2-287 b
Neptune-like · G-type yellow (Sun-like)
Radius 9.49 R⊕ · 516.4 ly
PH2 b
Neptune-like · G-type yellow (Sun-like)
Radius 9.34 R⊕ · 1,121.5 ly
HD 220197 b
Neptune-like · G-type yellow (Sun-like)
Radius 9.32 R⊕ · 210.1 ly