Confirmed Exoplanet Discovered 2007

CT Cha b

A gas giant orbiting the k-type orange CT Cha, located approximately 622.0 light-years from Earth.

Key parameters at a glance

  • A radius of 24.66 Earth radii
  • A mass of 5,403.00 Earth masses
  • Surface gravity around 8.88 g
  • Semi-major axis 440.0000 AU
  • Equilibrium temperature 2,600 K (2327 °C)
  • Distance from Earth 622.04 light-years
  • Earth Similarity Index 0.043
  • Travel time at Voyager 1 speed 10,969,758 years

CT Cha b Planet Profile

Physical Specs

Radius
24.66 R⊕
Radius (Jupiter)
2.200 R♃
Mass
5,403.00 M⊕
Mass (Jupiter)
17.000 M♃
Density
1.98 g/cm³
Surface Gravity
8.88 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.043
HZ Position Unknown
Controversial No

Discovery

Year 2007
Method Imaging
Facility Paranal Observatory
Telescope 8.2 m ESO VLT UT4 Yepun Telescope

Size rank in cohort

Rank by radius

#7of 1771

top 0.3%

This planet

24.66R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-1408 b 25.00 R⊕ HAT-P-67 b 23.99 R⊕ TOI-3540 A b 23.54 R⊕
Metric Earth CT Cha b Jupiter
Radius (R⊕)1.0024.6611.21
Mass (M⊕)1.005,403.00317.83
Density (g/cm³)5.511.981.33
Surface Gravity (g)1.008.882.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 5,403.000 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 454259409

Gaia DR2

Gaia DR2 5201360671411974912

Gaia DR3

Gaia DR3 5201360671411974912

System

CT Cha

Percentile among Gas Giant cohort

Radius 24.660 R⊕ · percentile 100 / cohort 1771
Mass 5,403.000 M⊕ · percentile 95 / cohort 1747
Distance 190.72 pc · percentile 49 / cohort 1759
ESI 0.043 · percentile 2 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
— days
Semi-major axis
440.0000 AU
Eccentricity
—
Inclination
— °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

2,600K

(2327 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.043

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched.

Discovery Paper

Primary reference

Schmidt et al. 2008

Instrument

NACO Camera

Publication

2008-11

Observation locale

Ground

Host System: CT Cha

Spectral Class

K-type orange

Effective Temperature

4,403 K — cooler than the Sun (5,778 K)

Estimated Age

0.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.680 R☉

Stellar Mass

—

Metallicity [Fe/H]

-0.56

Extended Stellar Properties

Surface gravity (log g)

3.660 dex

Rotational v·sin i

13.97 km/s

Metallicity ratio

[Fe/H]

Distance
190.72 parsec
Light-years 622.04 ly
V-band magnitude
12.34 mag
Voyager-speed travel 10,969,758 yr

Multi-band Host Photometry — 11 bands

2.713.813.80B12.34V11.77Gaia10.94TESS9.72J8.94H8.66K7.90W17.07W24.86W32.73W4

Astrometric Data

Parallax

5.214 mas

Total Proper Motion

22.210 mas/yr

PM Right Ascension

-22.21 mas/yr

PM Declination

-0.18 mas/yr

Galactic Cartesian (pc)

x = -0.227 · y = 0.057 · z = -0.972

Equatorial (J2000)

RA 166.03750° · Dec -76.45537°

Galactic ℓ, b

296.654° · -14.909°

Ecliptic λ, β

235.830° · -66.127°

HTM-20 index

-1350315203

Similar Worlds

HIP 65 A b

Gas Giant · K-type orange

Radius 22.75 R⊕ · 201.5 ly

PDS 70 c

Gas Giant · K-type orange

Radius 22.19 R⊕ · 368.8 ly

PDS 70 b

Gas Giant · K-type orange

Radius 21.97 R⊕ · 368.8 ly

GSC 06214-00210 b

Gas Giant · K-type orange

Radius 20.18 R⊕ · 353.9 ly

TOI-2669 b

Gas Giant · K-type orange

Radius 19.73 R⊕ · 1,283.2 ly

1RXS J160929.1-210524 b

Gas Giant · K-type orange

Radius 18.65 R⊕ · 453.8 ly

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