Planet Kepler-18 c

Detailed information about planet Kepler-18 c and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

Kepler-18 c

Planet Status

Confirmed

Discovered in

2011

Update

2021-02-05

Mass

0.054 (\pm 0.006)

M_J 2 publications

Densities and Eccentricities of 139 Kepler Planets from Transit Time Variations
Understanding the Mass-Radius Relation for Sub-Neptunes: Radius as a Proxy for Composition

Mass*sin(i)

—

Semi-Major Axis

0.0752 (\pm 0.0011)

AU 1 publication

Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements

Orbital Period

7.64159 (\pm 3e-05)

day 1 publication

Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements

Eccentricity

— 1 publication

Kepler-18b, c, and d: A System of Three Planets Confirmed by Transit Timing Variations, Light Curve Validation, Warm-Spitzer Photometry, and Radial Velocity Measurements

ω

—

T_peri

—

Radius

0.49 (\pm 0.023)

R_J 2 publications

Understanding the Mass-Radius Relation for Sub-Neptunes: Radius as a Proxy for Composition
Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements

Inclination

87.68 (\pm 0.22)

deg 1 publication

Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements

Detection Method

Primary Transit

Mass Meas. Method

—

Radius Meas. Method

—

Primary transit

2455167.0883 (\pm 0.0023)

JD 1 publication

Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements

Secondary transit

—

λ

—

Impact Parameter b

0.593 (\begin{matrix} + 0.05 \\ - 0.05 \end{matrix})

1 publication

Kepler-18b, c, and d: A System of Three Planets Confirmed by Transit Timing Variations, Light Curve Validation, Warm-Spitzer Photometry, and Radial Velocity Measurements

Time V_r=0

—

Velocity Semiamplitude K

5.1 (\begin{matrix} + 1.9 \\ - 1.9 \end{matrix})

m/s 1 publication

Kepler-18b, c, and d: A System of Three Planets Confirmed by Transit Timing Variations, Light Curve Validation, Warm-Spitzer Photometry, and Radial Velocity Measurements

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

2MASS J19521906+4444467 c, GSC 03149-02089 c, K00137.01, KIC 8644288 c, KOI-137 c, KOI-137.01, WISE J195219.06+444446.6  c

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

No remarks

No link

Star

Name

Kepler-18

Distance

438.51 (\begin{matrix} + 3.24 \\ - 3.24 \end{matrix})

Spectral type

—

Apparent magnitude V

14.0

Mass

0.97 (\begin{matrix} + 0.04 \\ - 0.04 \end{matrix})

M_Sun

Age

10.0 (\pm 2.3)

Gyr 1 publication

Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements

Effective temperature

5345.0 (\begin{matrix} + 100.0 \\ - 100.0 \end{matrix})

Radius

1.11 (\begin{matrix} + 0.05 \\ - 0.05 \end{matrix})

R_Sun

Metallicity [Fe/H]

0.19 (\begin{matrix} + 0.06 \\ - 0.06 \end{matrix})

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

19:52:19.1

Dec₂₀₀₀

+44:44:46.8

Alternate Names

2MASS J19521906+4444467, GSC 03149-02089, KIC 8644288, KOI-137, WISE J195219.06+444446.6

Alias 2MASS J19521906+4444467

No link

Simbad
Most recent references (ADS)

Planet Kepler-18 c

Planet

Basic informations 28 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks No remark

Other web pages No page

Star

Basic informations 13 parameters

Planetary system 3 planets

Remarks Some remarks

Other web pages No page

More data 2 references

Planet Kepler-18 c

Planet

Basic informations 28 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks No remark

Other web pages No page

Star

Basic informations 13 parameters

Planetary system 3 planets

Remarks Some remarks

Other web pages No page

More data 2 references

Related publications

TESS Observations of Kepler Systems with Transit Timing Variations

Revisiting the Kepler field with TESS: Improved ephemerides using TESS 2min data

The Planetary Mass-Radius Relation and its Dependence on Orbital Period as Measured by Transit Timing Variations and Radial Velocities

The destruction of inner planetary systems during high-eccentricity migration of gas giants

Understanding the Mass-Radius Relation for Sub-Neptunes: Radius as a Proxy for Composition

Inside-Out Planet Formation

Densities and Eccentricities of 139 Kepler Planets from Transit Time Variations

A Correlation Between the Eclipse Depths of Kepler Gas Giant Candidates and the Metallicities of their Parent Stars

A Uniformly Derived Catalogue of Exoplanets from Radial Velocities

Extracting Planet Mass and Eccentricity From TTV data

Model-Independent Stellar and Planetary Masses from Multi-Transiting Exoplanetary Systems

Kepler-18b, c, and d: A System of Three Planets Confirmed by Transit Timing Variations, Light Curve Validation, Warm-Spitzer Photometry, and Radial Velocity Measurements

Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements

The Exoplanet Handbook