Planet Kepler-21 b

Detailed information about planet Kepler-21 b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

Kepler-21 b

Planet Status

Confirmed

Discovered in

2012

Publication Status

Announced on a professional conference

Update

2021-02-05

Mass

0.01598 (\begin{matrix} + 0.00541 \\ - 0.00541 \end{matrix})

M_J 1 publication

Kepler-21b: A rocky planet around a V = 8.25 magnitude star

Mass*sin(i)

—

Semi-Major Axis

0.042717 (\begin{matrix} + 0.0 \\ - 0.0 \end{matrix})

AU 1 publication

Kepler-21b: A rocky planet around a V = 8.25 magnitude star

Orbital Period

2.78578 (\pm 3e-05)

day 2 publications

Kepler-21b: A rocky planet around a V = 8.25 magnitude star
Kepler 21b - Kepler's Brightest Host Star Harbors a 1.6 R_Earth Planet

Eccentricity

0.02 (\begin{matrix} + 0.1 \\ - 0.02 \end{matrix})

2 publications

Kepler-21b: A rocky planet around a V = 8.25 magnitude star
Kepler-21b: A 1.6REarth Planet Transiting the Bright Oscillating F Subgiant Star HD 179070

Angular distance

0.000394

arcsec

ω

-15.0 (\begin{matrix} + 79.0 \\ - 79.0 \end{matrix})

deg 1 publication

Kepler-21b: A rocky planet around a V = 8.25 magnitude star

T_peri

2456797.9 (\pm 0.7)

JD 1 publication

Kepler-21b: A rocky planet around a V = 8.25 magnitude star

Radius

0.146 (\begin{matrix} + 0.002 \\ - 0.001 \end{matrix})

R_J 1 publication

Kepler-21b: A rocky planet around a V = 8.25 magnitude star

Inclination

83.2 (\begin{matrix} + 0.28 \\ - 0.26 \end{matrix})

deg 1 publication

Kepler-21b: A rocky planet around a V = 8.25 magnitude star

Detection Method

Primary Transit

Mass Meas. Method

—

Radius Meas. Method

Primary Transit

Primary transit

2455093.83716 (\begin{matrix} + 0.00062 \\ - 0.00085 \end{matrix})

JD 2 publications

Kepler-21b: A rocky planet around a V = 8.25 magnitude star
Kepler-21b: A 1.6REarth Planet Transiting the Bright Oscillating F Subgiant Star HD 179070

Secondary transit

—

λ

—

Impact Parameter b

0.584 (\begin{matrix} + 0.018 \\ - 0.02 \end{matrix})

1 publication

Kepler-21b: A rocky planet around a V = 8.25 magnitude star

Time V_r=0

—

Velocity Semiamplitude K

1.99 (\pm 0.65)

m/s 1 publication

Kepler-21b: A rocky planet around a V = 8.25 magnitude star

Calculated temperature

2025.0 K 1 publication

Kepler-21b: A rocky planet around a V = 8.25 magnitude star

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

Kepler-21 b, 2MASS J19092683+3842505 b, BD+38 3455 b, HD 179070 b, HIP 94112 b, K00975.01, KIC 3632418 b, KOI-975 b, KOI-975.01, Kepler-21 A b, SAO 67891 b, TYC 3120-00963-1 b, WISE J190926.86+384250.7  b

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-21

Distance

108.86 (\begin{matrix} + 0.38 \\ - 0.38 \end{matrix})

Spectral type

F6 IV

Apparent magnitude V

8.27

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

1.41 (\begin{matrix} + 0.02 \\ - 0.03 \end{matrix})

M_Sun

Age

3.03 (\begin{matrix} + 0.35 \\ - -0.35 \end{matrix})

Gyr

Effective temperature

6305.0 (\begin{matrix} + 50.0 \\ - 50.0 \end{matrix})

Radius

1.9 (\begin{matrix} + 0.02 \\ - 0.01 \end{matrix})

R_Sun

Metallicity [Fe/H]

-0.03 (\begin{matrix} + 0.1 \\ - 0.1 \end{matrix})

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

19:09:26.8

Dec₂₀₀₀

+38:42:50.5

Alternate Names

Kepler-21, 2MASS J19092683+3842505, BD+38 3455, HD 179070, HIP 94112, KIC 3632418, KOI-975, Kepler-21 A, SAO 67891, TYC 3120-00963-1, WISE J190926.86+384250.7

Alias HD 179070

No link

Simbad
Most recent references (ADS)

Planet Kepler-21 b

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks No remark

Other web pages No page

Star

Basic informations 17 parameters

Planetary system 1 planet

Remarks Some remarks

Other web pages No page

More data 2 references

Planet Kepler-21 b

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks No remark

Other web pages No page

Star

Basic informations 17 parameters

Planetary system 1 planet

Remarks Some remarks

Other web pages No page

More data 2 references

Related publications

Detailed chemical compositions of planet-hosting stars: II. Exploration of the interiors of terrestrial-type exoplanets

The dynamical evolution of close-in binary systems formed by a super-earth and its host star. Case of the Kepler-21 system

Covariance of lucky images: performance analysis

The Densities of Planets in Multiple Stellar Systems

Kepler-21b: A rocky planet around a V = 8.25 magnitude star

A lucky imaging multiplicity study of exoplanet host stars II

Detailed Abundances of Stars with Small Planets Discovered by Kepler I: The First Sample

Dynamics of Rotation of Super-Earths

Validation of the Exoplanet Kepler-21b using PAVO/CHARA Long-Baseline Interferometry

A Uniformly Derived Catalogue of Exoplanets from Radial Velocities

An Efficient Automated Validation Procedure for Exoplanet Transit Candidates

The Exoplanet Handbook

Kepler 21b - Kepler's Brightest Host Star Harbors a 1.6 R_Earth Planet

Kepler-21b: A 1.6REarth Planet Transiting the Bright Oscillating F Subgiant Star HD 179070