Key parameters at a glance

A radius of 12.20 Earth radii
A mass of 5,689.16 Earth masses
Surface gravity around 38.22 g
An orbital period of 1,260.000 days
Semi-major axis 2.4100 AU
Distance from Earth 149.92 light-years
Earth Similarity Index 0.307
Travel time at Voyager 1 speed 2,643,883 years

brightness_6

Circumbinary planet

HD 202206 c orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.

HD 202206 c Planet Profile

Physical Specs

Radius

12.20 R⊕

Radius (Jupiter)

1.080 R♃

Mass

5,689.16 M⊕

Mass (Jupiter)

17.900 M♃

Density

17.20 g/cm³

Surface Gravity

38.22 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.307

HZ Position Unknown

Controversial No

Discovery

Year 2004

Method Radial Velocity

Facility La Silla Observatory

Telescope 1.2 m Leonhard Euler Telescope

Size rank in cohort

Rank by radius

#1410of 1771

top 79.6%

This planet

12.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

FU Tau b 12.20 R⊕ HD 168443 c 12.20 R⊕ HIP 5158 c 12.20 R⊕

Metric	Earth	HD 202206 c	Jupiter
Radius (R⊕)	1.00	12.20	11.21
Mass (M⊕)	1.00	5,689.16	317.83
Density (g/cm³)	5.51	17.20	1.33
Surface Gravity (g)	1.00	38.22	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	5,689.157 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	731.009 M⊕	Lower bound from radial-velocity fitting.
Computed mass	776.000 M⊕	Model-computed mass (e.g. from mass-radius relation).

Star Catalogue Identifiers

HD 202206

HIP

HIP 104903

TIC

TIC 24294415

Gaia DR2

Gaia DR2 6832155218215202944

Gaia DR3

Gaia DR3 6832155218215202944

System

HD 202206

Percentile among Gas Giant cohort

Radius 12.200 R⊕ · percentile 19 / cohort 1771

Mass 5,689.157 M⊕ · percentile 95 / cohort 1747

Orbital period 1,260.00 d · percentile 80 / cohort 1533

Distance 45.97 pc · percentile 17 / cohort 1759

ESI 0.307 · percentile 60 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,260.000 days

Semi-major axis

2.4100 AU

Eccentricity

0.220

Inclination

7.70 °

Year Length

A year here lasts about 3.45 Earth years on a mildly elliptical path at a mean orbital distance of 2.4100 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.307

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Correia et al. 2005

Instrument

CORALIE Spectrograph

Publication

2005-09

Observation locale

Ground

Discovery cohort

Planets confirmed in 2004 at La Silla Observatory (3 shown).

HD 41004 A b · Gas Giant HD 160691 d · Sub-Neptune HD 330075 b · Gas Giant

Host System: HD 202206

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,766 K — cooler than the Sun (5,778 K)

Estimated Age

2.90 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.040 R☉

Stellar Mass

1.070 M☉

Metallicity [Fe/H]

0.30

Extended Stellar Properties

Surface gravity (log g)

4.500 dex

Stellar density

1.250 g/cm³

Systemic radial velocity

14.72 km/s

Rotational v·sin i

2.30 km/s

Metallicity ratio

[Fe/H]

Distance

45.97 parsec

Light-years 149.92 ly

V-band magnitude

8.08 mag

Voyager-speed travel 2,643,883 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

21.726 mas

Total Proper Motion

126.202 mas/yr

PM Right Ascension

-39.08 mas/yr

PM Declination

-120.00 mas/yr

Galactic Cartesian (pc)

x = 0.703 · y = -0.617 · z = -0.355

Equatorial (J2000)

RA 318.74052° · Dec -20.78973°

Galactic ℓ, b

27.949° · -40.505°

Ecliptic λ, β

314.831° · -4.612°

HTM-20 index

-1736437849

Observation Record

Photometric series

RV measurements

Archive notes