Key parameters at a glance

A radius of 11.95 Earth radii
A mass of 266.98 Earth masses
Surface gravity around 1.87 g
An orbital period of 95.273 days
Semi-major axis 0.4021 AU
Equilibrium temperature 420 K (147 °C)
Distance from Earth 1,346.96 light-years
Earth Similarity Index 0.337
Travel time at Voyager 1 speed 23,753,622 years

CoRoT-9 b Planet Profile

Physical Specs

Radius

11.95 R⊕

Radius (Jupiter)

1.066 R♃

Mass

266.98 M⊕

Mass (Jupiter)

0.840 M♃

Density

0.86 g/cm³

Surface Gravity

1.87 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.337

HZ Position Unknown

Controversial No

Discovery

Year 2009

Method Transit

Facility CoRoT

Telescope 0.27 m CoRoT Telescope

Size rank in cohort

Rank by radius

#1521of 1771

top 85.8%

This planet

11.95R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Kepler-1704 b 11.95 R⊕ HATS-44 b 11.96 R⊕ TOI-6420 b 11.94 R⊕

Metric	Earth	CoRoT-9 b	Jupiter
Radius (R⊕)	1.00	11.95	11.21
Mass (M⊕)	1.00	266.98	317.83
Density (g/cm³)	5.51	0.86	1.33
Surface Gravity (g)	1.00	1.87	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	266.977 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 130162252

Gaia DR2

Gaia DR2 4285571629874670080

Gaia DR3

Gaia DR3 4285571629874670080

System

CoRoT-9

Percentile among Gas Giant cohort

Radius 11.949 R⊕ · percentile 14 / cohort 1771

Mass 266.977 M⊕ · percentile 29 / cohort 1747

Orbital period 95.27 d · percentile 53 / cohort 1533

Distance 412.98 pc · percentile 70 / cohort 1759

ESI 0.337 · percentile 67 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

95.273 days

Semi-major axis

0.4021 AU

Eccentricity

0.133

Inclination

89.90 °

Year Length

A year here lasts approximately 95.27 Earth days (26.1% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.4021 AU.

Transit Fingerprint

Depth

1.550 %

Duration

8.268 h

Impact parameter b

0.160

Rp / R★

0.114020

Transit midpoint (BJD)

2,455,365.5272

Photometric dip

Transit produces a flux drop of 15,500 ppm lasting ≈ 8.27 h.

Extended Orbital Architecture

Planet / star radius ratio

0.114020

Semi-major axis / stellar radius

89.900

Impact parameter (b)

0.160

RV semi-amplitude (K)

39.000 m/s

Transit mid-time (BJD)

2,455,365.5272

Long. of periastron (ω)

41.00°

Angular separation (arcsec)

0.97400

Eq. Temperature

420K

(147 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.337

0 = alien, 1 = Earth-identical

Insufficient insolation data — the surface is too hot to retain surface water.

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

Deeg et al. 2010

Instrument

CoRoT CCD Array

Publication

2010-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2009 at CoRoT (4 shown).

CoRoT-7 c · Sub-Neptune CoRoT-6 b · Gas Giant CoRoT-7 b · Super-Earth CoRoT-5 b · Gas Giant

Host System: CoRoT-9

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,625 K — cooler than the Sun (5,778 K)

Estimated Age

6.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.960 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

-0.01

Extended Stellar Properties

Surface gravity (log g)

4.540 dex

Stellar density

1.510 g/cm³

Systemic radial velocity

19.82 km/s

Rotational v·sin i

3.50 km/s

Metallicity ratio

[Fe/H]

Distance

412.98 parsec

Light-years 1,346.96 ly

V-band magnitude

13.64 mag

Voyager-speed travel 23,753,622 yr

Multi-band Host Photometry — 13 bands

Astrometric Data

Parallax

2.393 mas

Total Proper Motion

20.784 mas/yr

PM Right Ascension

-14.47 mas/yr

PM Declination

-14.92 mas/yr

Galactic Cartesian (pc)

x = 0.186 · y = -0.977 · z = 0.108

Equatorial (J2000)

RA 280.78665° · Dec 6.20408°

Galactic ℓ, b

37.523° · 4.662°

Ecliptic λ, β

282.301° · 29.184°

HTM-20 index

1097746628