Planet HD 202206 b

Detailed information about planet HD 202206 b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

HD 202206 b

Planet Status

Confirmed

Discovered in

2002

Publication Status

—

Update

2026-08-23

Mass

21.55 (\begin{matrix} + 0.8 \\ - 0.81 \end{matrix})

M_J 1 publication

Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system

Mass*sin(i)

17.5

M_J 2 publications

Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system
The CORALIE survey for southern extra-solar planets. VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443 and HD 202206: Brown dwarfs or "superplanets"?

Semi-Major Axis

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

AU 2 publications

Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system
The CORALIE survey for southern extra-solar planets. VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443 and HD 202206: Brown dwarfs or "superplanets"?

Orbital Period

256.26 (\pm 0.03)

day 2 publications

Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system
The CORALIE survey for southern extra-solar planets. VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443 and HD 202206: Brown dwarfs or "superplanets"?

Eccentricity

0.426 (\pm 0.002)

2 publications

Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system
The CORALIE survey for southern extra-solar planets. VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443 and HD 202206: Brown dwarfs or "superplanets"?

Angular distance

—

ω

161.64 (\begin{matrix} + 0.29 \\ - 0.28 \end{matrix})

deg 2 publications

Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system
The CORALIE survey for southern extra-solar planets. VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443 and HD 202206: Brown dwarfs or "superplanets"?

T_peri

—

Radius

—

Inclination

51.0 deg 1 publication

Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system

Detection Method

Radial Velocity

Mass Meas. Method

Radial Velocity

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

562.58 (\begin{matrix} + 1.35 \\ - 1.36 \end{matrix})

m/s 2 publications

Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system
The CORALIE survey for southern extra-solar planets. VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443 and HD 202206: Brown dwarfs or "superplanets"?

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

—

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

HD 202206

Distance

45.54 (\pm 0.25)

Spectral type

G2V

Apparent magnitude V

8.07

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

1.06 (\begin{matrix} + 0.07 \\ - 0.06 \end{matrix})

M_Sun 2 publications

The Planet-Metallicity Correlation.
Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system

Age

3.94 (\begin{matrix} + 1.28 \\ - 3.91 \end{matrix})

Gyr 2 publications

On the Ages of Exoplanet Host Stars
Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system

Effective temperature

5764.23 (\begin{matrix} + 64.0 \\ - 58.0 \end{matrix})

K 2 publications

Catalogue of [Fe/H] of F, G, K stars
Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system

Radius

1.04 (\pm 0.02)

R_Sun 2 publications

The Planet-Metallicity Correlation.
Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system

Metallicity [Fe/H]

0.23 (\begin{matrix} + 0.12 \\ - 0.13 \end{matrix})

2 publications

The CORALIE survey for southern extra-solar planets. VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443 and HD 202206: Brown dwarfs or "superplanets"?
Dynamical analysis of the 5:1 mean-motion resonance of the HD 202206 system

Detected Disc

IR Excess 1 publication

On the Relationship Between Debris Disks and Planets

Magnetic Field

—

RA₂₀₀₀

21:14:57.0

Dec₂₀₀₀

-20:47:21.0

Alternate Names

—

Initially reported as brown dwarf + exoplanet host, HD 202206 was revisited as a binary system with an inner very low-mass red dwarf companion and an outer circumbinary planet straddling the H-D burning limit (Benedict & Harrison 2017).
A new stability analysis by Cao et al. (2026) instead favours former orbital solution with two coplanar substellar companions, an inner brown dwarf and an outer gas giant planet.

Papers with primary data: