» Extrasolar Planet Guide » HD 80606 » HD 80606 b

Sulfurous Cloud Jovian, Eccentric
Object Type: Sulfurous Cloud Jovian, Eccentric
Parent Star: HD 80606 (G5 V)
Discovery Status: Confirmed
Habitability: Planet at inner edge of Habitable Zone at Mean Orbital Distance
Orbit of HD 80606 b Current Planet
Habitability Zone Habitability Zone
Mass ( M sin i ): 3.41 Jupiters
Periastron Distance: 0.03 AU
Mean Distance: 0.439 AU
Apastron Distance: 0.84 AU
Orbital Period: 111.78 ± 0.21 Days
Eccentricity: 0.927 ± 0.012
Argument of Perihelion (omega):
291.5 °
Radial Velocity of Star: 414 m/s
Planet Appearance:
Sulfur stained clouds of water or H2SO4
Estimated Radius:
1.039 Jupiters 1
Estimated Periastron Temp: 1266 Kelvin
Estimated Mean Temp: 342 Kelvin
Estimated Apastron Temp: 246 Kelvin
Temp from
Internal Heating :

164.552 Kelvins 2
Max Angular Star Size: 15.248°
Mean Angular Star Size: 1.042°
Min Angular Star Size: 0.544°
Gravitational Influence
(Hill Sphere): 		0.046 AU / 6980000 km
Max Stable Prograde Moon Orbit: 0.016 AU / 2510000 km
Max Moon Mass: < 0.0001 Earths 3,4
1.9216 x Miranda
Tidally locked if older than: > 20 Gyr 5
Estimated Bond Albedo: ~ 0.79 6
Notes:
     1 from planet formation models of Burrows et al
     2 from planet formation models of Burrows et al
     3 assuming age of 5 Gyr
     4 based on periastron due to high eccentricity
     5 orbit may be too eccentric for 1:1 tidal lock
     6 from Sudarsky et al. 2000
Year Discovered: 2001
Detection Method: Doppler Spectroscopy
Discovered By: Michel Mayor, Dominique Naef, Francesco Pepe, Didier Queloz, Nuno C. Santos, Stephane Udry, Michel Burnet

As of April 2001, HD 80606 b has the is the highest eccentricity of any known exoplanet.

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