Key parameters at a glance
- A radius of 4.31 Earth radii
- A mass of 17.14 Earth masses
- Surface gravity around 0.92 g
- An orbital period of 8.966 days
- Distance from Earth 521.54 light-years
- Earth Similarity Index 0.521
- Travel time at Voyager 1 speed 9,197,411 years
Context from the literature
CoRoT-7 is a binary star system made up of a late G-type star and a M-dwarf star that was discovered in 2021. The primary star has three exoplanets, including CoRoT-7b, a super-Earth exoplanet that is remarkable due to its extremely high temperature and very short orbital period, around 20 hours. It was the first exoplanet shown to be rocky. The system has the name CoRoT-7 after the CoRoT space telescope, which discovered the exoplanets around the star CoRoT-7A. The stellar system is 520 light-years from the Earth.
Excerpted from Wikipedia · full article
2 siblings around CoRoT-7
CoRoT-7 d shares its host star with 2 other confirmed planets. Side-by-side measurements below.
CoRoT-7 d Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#491of 574
top 85.4%
This planet
4.31R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | CoRoT-7 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 4.31 | 11.21 |
| Mass (M⊕) | 1.00 | 17.14 | 317.83 |
| Density (g/cm³) | 5.51 | 1.18 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.92 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 17.142 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 280304863
Gaia DR2
Gaia DR2 3107267177757848576
Gaia DR3
Gaia DR3 3107267177757848576
System
CoRoT-7
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.97 Earth days (2.5% of a terrestrial year).
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.521
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
John et al. 2022Instrument
HARPS Spectrograph
Publication
2022-07
Observation locale
Ground
Discovery cohort
Planets confirmed in 2022 at La Silla Observatory (12 shown).
Host System: CoRoT-7
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,250 K — cooler than the Sun (5,778 K)
Estimated Age
1.80 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.839 R☉
Stellar Mass
0.915 M☉
Metallicity [Fe/H]
0.12
Extended Stellar Properties
Surface gravity (log g)
4.573 dex
Stellar density
2.354 g/cm³
Systemic radial velocity
31.17 km/s
Rotational v·sin i
3.50 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 13 bands
Astrometric Data
Parallax
6.225 mas
Total Proper Motion
10.961 mas/yr
PM Right Ascension
10.96 mas/yr
PM Declination
-0.11 mas/yr
Galactic Cartesian (pc)
x = -0.190 · y = 0.982 · z = -0.019
Equatorial (J2000)
RA 100.95617° · Dec -1.06301°
Galactic ℓ, b
213.010° · -2.179°
Ecliptic λ, β
102.006° · -24.047°
HTM-20 index
155434600
Similar Worlds
HD 204313 c
Neptune-like · G-type yellow (Sun-like)
Radius 4.31 R⊕ · 155.9 ly
HD 109271 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.31 R⊕ · 182.2 ly
KOI-984 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.30 R⊕ · 824.1 ly
Kepler-501 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.30 R⊕ · 3,670.0 ly
Kepler-38 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.30 R⊕ · 3,831.0 ly
Kepler-554 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.29 R⊕ · 2,252.2 ly