Key parameters at a glance
- A radius of 16.43 Earth radii
- A mass of 1,102.82 Earth masses
- Surface gravity around 4.08 g
- An orbital period of 1.743 days
- Semi-major axis 0.0280 AU
- Equilibrium temperature 1,521 K (1248 °C)
- Distance from Earth 695.64 light-years
- Earth Similarity Index 0.090
- Travel time at Voyager 1 speed 12,267,528 years
CoRoT-2 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#136of 1771
top 7.6%
This planet
16.43R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | CoRoT-2 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 16.43 | 11.21 |
| Mass (M⊕) | 1.00 | 1,102.82 | 317.83 |
| Density (g/cm³) | 5.51 | 1.47 | 1.33 |
| Surface Gravity (g) | 1.00 | 4.08 | 2.53 |
| Insolation (S⊕) | 1.00 | 932.91 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,102.820 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 391958006
Gaia DR2
Gaia DR2 4287820848378092672
Gaia DR3
Gaia DR3 4287820848378092672
System
CoRoT-2
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.74 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0280 AU.
Transit Fingerprint
Depth
2.750 %
Duration
2.267 h
Impact parameter b
0.221
Rp / R★
0.166700
Transit midpoint (BJD)
2,454,237.5356
Photometric dip
Transit produces a flux drop of 27,500 ppm lasting ≈ 2.27 h.
Extended Orbital Architecture
Planet / star radius ratio
0.166700
Semi-major axis / stellar radius
6.700
Impact parameter (b)
0.221
RV semi-amplitude (K)
603.000 m/s
Transit mid-time (BJD)
2,454,237.5356
Long. of periastron (ω)
102.00°
Sky-projected obliquity (λ)
4.00°
Angular separation (arcsec)
0.13100
Eq. Temperature
1,521K
(1248 °C)
Insolation (S⊕)
932.91
Earth = 1.00
Earth Similarity (ESI)
0.090
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.
Transit timing variations
Gravitational interactions from neighbours have been detected.
Discovery Paper
Primary reference
Alonso et al. 2008Instrument
CoRoT CCD Array
Publication
2008-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2008 at CoRoT (3 shown).
Host System: CoRoT-2
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,625 K — cooler than the Sun (5,778 K)
Estimated Age
2.70 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.906 R☉
Stellar Mass
0.960 M☉
Metallicity [Fe/H]
0.04
Extended Stellar Properties
Surface gravity (log g)
4.530 dex
Stellar density
1.814 g/cm³
Systemic radial velocity
23.25 km/s
Rotational v·sin i
10.87 km/s
Rotation period
4.52 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.661 mas
Total Proper Motion
11.455 mas/yr
PM Right Ascension
-3.41 mas/yr
PM Declination
-10.94 mas/yr
Galactic Cartesian (pc)
x = 0.371 · y = -0.928 · z = 0.024
Equatorial (J2000)
RA 291.77705° · Dec 1.38366°
Galactic ℓ, b
38.263° · -7.291°
Ecliptic λ, β
293.765° · 23.044°
HTM-20 index
182839079
Observation Record
Photometric series
20
RV measurements
5
Emission spectra
7
Archive notes
7
Similar Worlds
TOI-3023 b
Gas Giant · G-type yellow (Sun-like)
Radius 16.43 R⊕ · 1,271.7 ly
TOI-2295 b
Gas Giant · G-type yellow (Sun-like)
Radius 16.48 R⊕ · 411.9 ly
WASP-183 b
Gas Giant · G-type yellow (Sun-like)
Radius 16.48 R⊕ · 1,061.2 ly
CoRoT-31 b
Gas Giant · G-type yellow (Sun-like)
Radius 16.37 R⊕ · 6,541.9 ly
NGTS-3 A b
Gas Giant · G-type yellow (Sun-like)
Radius 16.59 R⊕ · 2,426.5 ly
TOI-5322 b
Gas Giant · G-type yellow (Sun-like)
Radius 16.61 R⊕ · 1,555.4 ly