Planet K2-18 c

Detailed information about planet K2-18 c and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

K2-18 c

Planet Status

Confirmed

Discovered in

2017

Update

2021-02-05

Mass

0.02363 (\begin{matrix} + 0.00418 \\ - 0.00418 \end{matrix})

M_J

Mass*sin(i)

0.02363 (\begin{matrix} + 0.00418 \\ - 0.00418 \end{matrix})

M_J

Semi-Major Axis

0.06 (\begin{matrix} + 0.003 \\ - 0.003 \end{matrix})

AU 1 publication

Characterization of the K2-18 multi-planetary system with HARPS: A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit

Orbital Period

8.962 (\pm 0.008)

day 2 publications

Tidal evolution of exoplanetary systems hosting potentially habitable exoplanets. The cases of LHS-1140 b-c and K2-18 b-c
Characterization of the K2-18 multi-planetary system with HARPS: A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit

Eccentricity

0.47

1 publication

Characterization of the K2-18 multi-planetary system with HARPS: A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit

ω

—

T_peri

—

Radius

—

Inclination

—

Detection Method

Radial Velocity

Mass Meas. Method

Radial Velocity

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

4.63 (\pm 0.72)

m/s 1 publication

Characterization of the K2-18 multi-planetary system with HARPS: A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit

Calculated temperature

363.0 (\begin{matrix} + 14.0 \\ - 14.0 \end{matrix})

K 1 publication

Characterization of the K2-18 multi-planetary system with HARPS: A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

2MASS J11301450+0735180 c, EPIC 201912552 c, WISE J113014.45+073516.8 c

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Sarkis et al. 2018 : Analysis of CARMENES data favor stellar activity for the VR signal origin.

No link

Star

Name

K2-18

Distance

38.07 (\begin{matrix} + 0.08 \\ - 0.08 \end{matrix})

Spectral type

M2.5 V

Apparent magnitude V

13.5

Mass

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

M_Sun

Age

—

Effective temperature

3457.0 (\begin{matrix} + 39.0 \\ - 39.0 \end{matrix})

Radius

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

R_Sun

Metallicity [Fe/H]

0.12 (\begin{matrix} + 0.16 \\ - 0.16 \end{matrix})

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

11:30:14.5

Dec₂₀₀₀

+07:35:18.2

Alternate Names

EPIC 201912552, 2MASS J11301450+0735180, WISE J113014.45+073516.8

No remarks

No link

Simbad
Most recent references (ADS)

Planet K2-18 c

Planet

Basic informations 28 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 13 parameters

Planetary system 2 planets

Remarks No remark

Other web pages No page

More data 2 references

Planet K2-18 c

Planet

Basic informations 28 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 13 parameters

Planetary system 2 planets

Remarks No remark

Other web pages No page

More data 2 references

Related publications

High-resolution Elemental Abundance Measurements of Cool JWST Planet Hosts Using AutoSpecFit: An Application to the Sub-Neptune K2-18b's Host M dwarf

Secular Orbital Dynamics of the Possibly Habitable Planet K2-18 b with and without the Proposed Inner Companion

The CARMENES search for exoplanets around M dwarfs. Guaranteed time observations Data Release 1 (2016-2020)

Revisiting Radial Velocity Measurements of the K2-18 System with the Line-by-Line Framework

Tidal evolution of exoplanetary systems hosting potentially habitable exoplanets. The cases of LHS-1140 b-c and K2-18 b-c

Reconciling the planetary interpretation of the radial velocity super-Earth K2-18c

The K2-18b Planetary System: Estimates of the Age and X-UV Irradiances of a Habitable Zone "Wet" Sub-Neptune Planet

Confirmation of the radial velocity super-Earth K2-18c with HARPS and CARMENES

The CARMENES search for exoplanets around M dwarfs: A low-mass planet in the temperate zone of the nearby K2-18

The CARMENES Search for Exoplanets around M Dwarfs: A Low-mass Planet in the Temperate Zone of the Nearby K2-18

Characterization of the K2-18 multi-planetary system with HARPS: A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit

Stellar and Planetary Properties of K2 Campaign 1 Candidates and Validation of 17 Systems, Including a Planet Receiving Earth-like Insolation