Extrasolar Visions - HD 202206 b

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Brown Dwarf

Object Type:

Brown Dwarf

Parent Star:

HD 202206 (G6 V)

Discovery Status:

Confirmed

Habitability:

Planet at inner edge of Habitable Zone at Mean Orbital Distance

Current Planet

Habitability Zone

Mass ( M sin i ):

17.4 Jupiters

Periastron Distance:

0.46 AU

Mean Distance:

0.83 AU

Apastron Distance:

1.19 AU

Orbital Period:

255.87 ± 0.06 Days

Eccentricity:

0.435 ± 0.001

Argument of Perihelion (omega):

161.18 °

Radial Velocity of Star:

14.577 m/s

System Age:

600 Myr

Estimated Radius:

1.026 Jupiters ¹

Estimated Periastron Temp:

386 Kelvin

Estimated Mean Temp:

290 Kelvin

Estimated Apastron Temp:

242 Kelvin

Temp from
Internal Heating :

752.077 Kelvins ²

Max Angular Star Size:

1.306°

Mean Angular Star Size:

0.724°

Min Angular Star Size:

0.505°

Gravitational Influence
(Hill Sphere):

0.14 AU / 20960000 km

Max Stable Prograde Moon Orbit:

0.05 AU / 7540000 km

Max Moon Mass:

> 10 Earths ³

Tidally locked if older than:

> 20 Gyr ⁴

Notes:
    ¹ from planet formation models of Burrows et al
    ² from planet formation models of Burrows et al
    ³ based on periastron due to high eccentricity
    ⁴ orbit may be too eccentric for 1:1 tidal lock

Year Discovered:

2000

Detection Method:

Doppler Spectroscopy

Discovered By:

M. Mayor, D. Naef, F. Pepe, D. Queloz, N.C. Santos, S. Udry

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