Planet Kepler-109 Ac

Detailed information about planet Kepler-109 Ac and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

Kepler-109 Ac

Planet Status

Confirmed

Discovered in

2014

Publication Status

Published in a refereed paper

Update

2025-09-05

Mass

0.06859 (\begin{matrix} + 0.0 \\ - 0.06859 \end{matrix})

M_J 1 publication

Masses, radii, and orbits of small Kepler planets: the transition from gaseous to rocky planets

Mass*sin(i)

—

Semi-Major Axis

—

Orbital Period

21.2227 day 1 publication

Masses, radii, and orbits of small Kepler planets: the transition from gaseous to rocky planets

Eccentricity

0.03 (\begin{matrix} + 0.19 \\ - 0.03 \end{matrix})

1 publication

Eccentricity from transit photometry: small planets in Kepler multi-planet systems have low eccentricities

Angular distance

—

ω

—

T_peri

—

Radius

0.225 (\begin{matrix} + 0.006 \\ - 0.006 \end{matrix})

R_J 1 publication

Masses, radii, and orbits of small Kepler planets: the transition from gaseous to rocky planets

Inclination

—

Detection Method

Primary Transit

Mass Meas. Method

—

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

0.16 (\pm 0.08)

1 publication

Masses, radii, and orbits of small Kepler planets: the transition from gaseous to rocky planets

Time V_r=0

—

Velocity Semiamplitude K

0.43 (\pm 1.5)

m/s 1 publication

Masses, radii, and orbits of small Kepler planets: the transition from gaseous to rocky planets

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

2MASS J19213425+4017055 c, K00123.02, KIC 5094751 c, KOI-123 c, KOI-123.02, WISE J192134.24+401705.6  c

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Star

Name

Kepler-109 A

Distance

474.861 (\begin{matrix} + 5.349 \\ - 5.233 \end{matrix})

Spectral type

G0IV-V

Apparent magnitude V

12.365

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

1.094 (\begin{matrix} + 0.086 \\ - 0.078 \end{matrix})

M_Sun 1 publication

Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems

Age

6.2 (\begin{matrix} + 2.7 \\ - 2.2 \end{matrix})

Gyr 1 publication

Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems

Effective temperature

5950.0 (\pm 62.0)

K 2 publications

Masses, radii, and orbits of small Kepler planets: the transition from gaseous to rocky planets
Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems

Radius

1.387 (\pm 0.021)

R_Sun 1 publication

Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems

Metallicity [Fe/H]

-0.02 (\pm 0.065)

2 publications

Masses, radii, and orbits of small Kepler planets: the transition from gaseous to rocky planets
Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

19:21:34.3

Dec₂₀₀₀

+40:17:05.5

Alternate Names

KOI-123, KIC 5094751, 2MASS J19213425+4017055, WISE J192134.24+401705.6

Eeles-Nolle & Armstrong (2025): A faint companion, likely an M dwarf (Gaia DR3 2101175929094120960, G = 19.12), lies 13.54 arcseconds away (6,430 AUs at 475 pc).

No link

Simbad
Most recent references (ADS)

Planet Kepler-109 Ac

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 17 parameters

Planetary system 2 planets

Remarks Some remarks

Other web pages No page

More data 2 references

Planet Kepler-109 Ac

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 17 parameters

Planetary system 2 planets

Remarks Some remarks

Other web pages No page

More data 2 references

Related publications

A high stellar multiplicity rate amongst TESS planet candidates in the Neptunian desert using Gaia DR3 astrometry

Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems

Hidden Planetary Friends: On the Stability Of 2-Planet Systems in the Presence of a Distant, Inclined Companion

Eccentricity from transit photometry: small planets in Kepler multi-planet systems have low eccentricities

Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology

Masses, radii, and orbits of small Kepler planets: the transition from gaseous to rocky planets