Planet GJ 143 b

Detailed information about planet GJ 143 b and its parameters.

Planet parameters Publications Observability Predictor Exo3D

Planet

Name

GJ 143 b

Planet Status

Confirmed

Discovered in

2018

Publication Status

—

Update

2026-07-06

Mass

0.0815 (\pm 0.0041)

M_J 1 publication

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities

Mass*sin(i)

—

Semi-Major Axis

0.1904 (\pm 0.0005)

AU 2 publications

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities
TESS exoplanet candidates validated with HARPS archival data. A massive Neptune around GJ 143 and two Neptunes around HD 23472

Orbital Period

35.613442 (\pm 1.6e-05)

day 2 publications

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities
TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

Eccentricity

0.122 (\pm 0.022)

2 publications

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities
TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

Angular distance

—

ω

146.0 (\begin{matrix} + 23.4 \\ - 313.7 \end{matrix})

deg 2 publications

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities
TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

T_peri

—

Radius

0.2506 (\pm 0.00553)

R_J 2 publications

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities
TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

Inclination

89.38 (\pm 0.33)

deg 1 publication

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities

Detection Method

Primary Transit

Mass Meas. Method

Radial Velocity

Radius Meas. Method

Primary Transit

Primary transit

2458385.92502 (\begin{matrix} + 0.00054 \\ - 0.00055 \end{matrix})

Secondary transit

—

λ

—

Impact Parameter b

0.584 (\begin{matrix} + 0.066 \\ - 0.077 \end{matrix})

2 publications

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities
TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

Time V_r=0

—

Velocity Semiamplitude K

6.24 (\begin{matrix} + 0.3 \\ - 0.31 \end{matrix})

m/s 2 publications

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities
TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

Calculated temperature

436.0 (\pm 2.0)

K 1 publication

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

HD 21749 b, TOI-186 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

GJ 143

Distance

16.33 (\pm 0.03)

pc 2 publications

TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune
TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

Spectral type

K4.5V

Apparent magnitude V

8.3

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

0.76 (\pm 0.007)

M_Sun 1 publication

TESS exoplanet candidates validated with HARPS archival data. A massive Neptune around GJ 143 and two Neptunes around HD 23472

Age

3.8 (\pm 3.7)

Gyr

Effective temperature

4640.0 (\pm 100.0)

K 1 publication

TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

Radius

0.73 (\pm 0.01)

R_Sun 1 publication

TESS exoplanet candidates validated with HARPS archival data. A massive Neptune around GJ 143 and two Neptunes around HD 23472

Metallicity [Fe/H]

0.003 (\pm 0.06)

1 publication

TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

03:26:59.0

Dec₂₀₀₀

-63:29:57.0

Alternate Names

HD 21749, TOI-186

No remarks

No link

Simbad
Most recent references (ADS)

Planet GJ 143 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 2 planets

Remarks No remark

Other web pages No page

More data 2 references

Planet GJ 143 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 2 planets

Remarks No remark

Other web pages No page

More data 2 references

Related publications

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities

The Search for the Inbetweeners: How packed are TESS planetary systems?

Revisiting the HD 21749 Planetary System with Stellar Activity Modeling

TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

TESS exoplanet candidates validated with HARPS archival data. A massive Neptune around GJ 143 and two Neptunes around HD 23472