Planet K2-121 b

Detailed information about planet K2-121 b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

K2-121 b

Planet Status

Confirmed

Discovered in

2017

Update

2021-02-05

Mass

—

Mass*sin(i)

—

Semi-Major Axis

0.0525 (\begin{matrix} + 0.0003 \\ - 0.0003 \end{matrix})

AU 1 publication

Sixty Validated Planets from K2 Campaigns 5-8

Orbital Period

5.185761 (\begin{matrix} + 2.9e-05 \\ - 3e-05 \end{matrix})

day 1 publication

Sixty Validated Planets from K2 Campaigns 5-8

Eccentricity

0.22 1 publication

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

ω

72.97 deg 1 publication

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

T_peri

—

Radius

0.669 (\begin{matrix} + 0.012 \\ - 0.012 \end{matrix})

R_J 1 publication

Sixty Validated Planets from K2 Campaigns 5-8

Inclination

87.25 deg 1 publication

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

Detection Method

Primary Transit

Mass Meas. Method

—

Radius Meas. Method

Primary Transit

Primary transit

2457143.561 (\pm 0.001)

JD 1 publication

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

Secondary transit

—

λ

—

Impact Parameter b

0.21 (\begin{matrix} + 0.17 \\ - 0.15 \end{matrix})

1 publication

Sixty Validated Planets from K2 Campaigns 5-8

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

723.0 (\begin{matrix} + 13.0 \\ - 13.0 \end{matrix})

K 1 publication

Sixty Validated Planets from K2 Campaigns 5-8

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

EPIC 211818569 b, 2MASS J08274481+1734457 b, EPIC 211818569.01, WISE J082744.80+173445.6 b

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Denning et al., 2017 : The credibility of this planet is based on VESPA framework (Morton et al., 2015): The probability that the transit-like event is caused by an astrophysical false positive rather than a genuine planetary transit is smaller than 1%.

No link

Star

Name

K2-121

Distance

170.37 (\begin{matrix} + 1.08 \\ - 1.08 \end{matrix})

Spectral type

K5V

Apparent magnitude V

—

Mass

0.72 (\begin{matrix} + 0.01 \\ - 0.01 \end{matrix})

M_Sun

Age

—

Effective temperature

4551.0 (\begin{matrix} + 74.0 \\ - 74.0 \end{matrix})

Radius

0.68 (\begin{matrix} + 0.01 \\ - 0.01 \end{matrix})

R_Sun

Metallicity [Fe/H]

-0.04 (\begin{matrix} + 0.1 \\ - 0.1 \end{matrix})

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

08:27:44.8

Dec₂₀₀₀

+17:34:45.8

Alternate Names

EPIC 211818569, 2MASS J08274481+1734457, WISE J082744.80+173445.6

No remarks

No link

Simbad
Most recent references (ADS)

Planet K2-121 b

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 1 planet

Remarks No remark

Other web pages No page

More data 2 references

Planet K2-121 b

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 1 planet

Remarks No remark

Other web pages No page

More data 2 references

Related publications

Sixty Validated Planets from K2 Campaigns 5-8

Characterizing K2 Candidate Planetary Systems Orbiting Low-Mass Stars I: Classifying Low-mass Host Stars Observed During Campaigns 1-7

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