Planet K2-21 c

Detailed information about planet K2-21 c and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

K2-21 c

Planet Status

Confirmed

Discovered in

2015

Update

2023-05-22

Mass

0.01561 (\pm 0.0012)

M_J 1 publication

The 14 Her Planetary System: Companion Masses and Architecture from Radial Velocities and Astrometry

Mass*sin(i)

—

Semi-Major Axis

0.107 (\begin{matrix} + 0.003 \\ - 0.004 \end{matrix})

AU 1 publication

Characterizing K2 Candidate Planetary Systems Orbiting Low-Mass Stars II: Planetary Systems Observed During Campaigns 1-7

Orbital Period

15.0 (\pm 0.0001)

day 2 publications

The 14 Her Planetary System: Companion Masses and Architecture from Radial Velocities and Astrometry
Characterizing K2 Candidate Planetary Systems Orbiting Low-Mass Stars II: Planetary Systems Observed During Campaigns 1-7

Eccentricity

0.21 (\begin{matrix} + 0.20677 \\ - 0.173719 \end{matrix})

1 publication

Characterizing K2 Candidate Planetary Systems Orbiting Low-Mass Stars II: Planetary Systems Observed During Campaigns 1-7

ω

59.96 (\begin{matrix} + 75.6752 \\ - 120.5778 \end{matrix})

deg 1 publication

Characterizing K2 Candidate Planetary Systems Orbiting Low-Mass Stars II: Planetary Systems Observed During Campaigns 1-7

T_peri

—

Radius

0.222 (\begin{matrix} + 0.015 \\ - 0.017 \end{matrix})

R_J 1 publication

Characterizing K2 Candidate Planetary Systems Orbiting Low-Mass Stars II: Planetary Systems Observed During Campaigns 1-7

Inclination

89.21 (\pm 0.26)

deg 2 publications

The 14 Her Planetary System: Companion Masses and Architecture from Radial Velocities and Astrometry
Characterizing K2 Candidate Planetary Systems Orbiting Low-Mass Stars II: Planetary Systems Observed During Campaigns 1-7

Detection Method

Primary Transit

Mass Meas. Method

TTV

Radius Meas. Method

Primary Transit

Primary transit

2456988.4708 (\begin{matrix} + 0.0021 \\ - 0.0017 \end{matrix})

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

2MASS J22411288-1429202 c, EPIC 206011691 c, EPIC 206011691.02, WISE J224112.90-142921.1 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

K2-21

Distance

83.85 (\begin{matrix} + 0.26 \\ - 0.26 \end{matrix})

Spectral type

M0.0

Apparent magnitude V

12.85

Mass

0.68 (\begin{matrix} + 0.07 \\ - 0.07 \end{matrix})

M_Sun

Age

—

Effective temperature

4222.06 (\begin{matrix} + 88.15 \\ - 84.41 \end{matrix})

Radius

0.65 (\begin{matrix} + 0.03 \\ - 0.03 \end{matrix})

R_Sun

Metallicity [Fe/H]

-0.11 (\pm 0.13)

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

22:41:12.9

Dec₂₀₀₀

-14:29:20.4

Alternate Names

2MASS 22411288-1429202, 2MASS J22411288-1429202, EPIC 206011691, WISE J224112.90-142921.1

No remarks

No link

Simbad
Most recent references (ADS)

Planet K2-21 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 2 planets

Remarks No remark

Other web pages No page

More data 2 references

Planet K2-21 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 2 planets

Remarks No remark

Other web pages No page

More data 2 references

Related publications

The 14 Her Planetary System: Companion Masses and Architecture from Radial Velocities and Astrometry

Mass derivation of planets K2-21b and K2-21c from transit timing variations

High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). II. Lucky Imaging results from 2015 and 2016

Characterizing K2 Candidate Planetary Systems Orbiting Low-Mass Stars II: Planetary Systems Observed During Campaigns 1-7

Two Transiting Earth-size Planets Near Resonance Orbiting a Nearby Cool Star