Planet GJ 229 d

Detailed information about planet GJ 229 d and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

GJ 229 d

Planet Status

Confirmed

Discovered in

2020

Update

2024-08-28

Mass

0.02495 (\begin{matrix} + 0.01067 \\ - 0.01082 \end{matrix})

M_J

Mass*sin(i)

0.02495 (\begin{matrix} + 0.01067 \\ - 0.01082 \end{matrix})

M_J 1 publication

Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs

Semi-Major Axis

0.339 (\begin{matrix} + 0.024 \\ - 0.029 \end{matrix})

AU 1 publication

Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs

Orbital Period

122.005 (\begin{matrix} + 0.364 \\ - 0.382 \end{matrix})

day 1 publication

Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs

Eccentricity

0.29 (\begin{matrix} + 0.06 \\ - 0.26 \end{matrix})

1 publication

Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs

ω

101.0 (\begin{matrix} + 104.0 \\ - 64.0 \end{matrix})

deg 1 publication

Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs

T_peri

—

Radius

—

Inclination

—

Detection Method

Radial Velocity

Mass Meas. Method

Spectrum

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

2.15 (\begin{matrix} + 0.5 \\ - 0.89 \end{matrix})

m/s 1 publication

Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

GJ 229 Ac, HD 42581 d

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Alternative designation is "GJ 229 Ac" if the outer brown dwarf "GJ 229 b" is regarded more like a stellar rather than substellar/planetary component.

No link

Star

Name

GJ 229

Distance

5.75624 (\pm 0.001525)

pc 1 publication

The Revised TESS Input Catalog and Candidate Target List

Spectral type

M1V

Apparent magnitude V

8.125

Mass

0.544 (\pm 0.041)

M_Sun 2 publications

Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs
The Revised TESS Input Catalog and Candidate Target List

Age

2.45 (\pm 0.2)

Gyr 1 publication

The cool brown dwarf Gliese 229 B is a close binary

Effective temperature

3564.0 K 1 publication

Bayesian search for low-mass planets around nearby M dwarfs. Estimates for occurrence rate based on global detectability statistics

Radius

0.548 (\pm 0.043)

R_Sun 1 publication

The Revised TESS Input Catalog and Candidate Target List

Metallicity [Fe/H]

—

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

06:10:34.6

Dec₂₀₀₀

-21:51:52.7

Alternate Names

HD 42581, NAJ 1

No remarks

No link

Simbad
Most recent references (ADS)

Planet GJ 229 d

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 4 planets

Remarks No remark

Other web pages No page

More data 2 references

Planet GJ 229 d

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 4 planets

Remarks No remark

Other web pages No page

More data 2 references

Related publications

Atmospheric abundances and bulk properties of the binary brown dwarf Gliese 229 Bab from JWST/MIRI spectroscopy

Discovery of the Binarity of Gliese 229B, and Constraints on the System's Properties

The cool brown dwarf Gliese 229 B is a close binary

Planetary system architectures with low-mass inner planets: Direct imaging exploration of mature systems beyond 1 au

Investigating Possible Binarity for GJ 229B

The Initial Mass Function Based on the Full-sky 20-pc Census of ∼3,600 Stars and Brown Dwarfs

The Detectability of Nightside City Lights on Exoplanets

Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs

The Revised TESS Input Catalog and Candidate Target List

Physical Properties of Gliese 229B Based on Newly Determined Carbon and Oxygen Abundances of Gliese 229A

Bayesian search for low-mass planets around nearby M dwarfs. Estimates for occurrence rate based on global detectability statistics