» Extrasolar Planet Guide » iota Horologii » iota Horologii b


Sulfurous Cloud Jovian, Eccentric
Object Type: Sulfurous Cloud Jovian, Eccentric
Parent Star: iota Horologii (G0V pecul.)
Discovery Status: Likely
Habitability: Planet at inner edge of Habitable Zone at Mean Orbital Distance
Orbit of iota Horologii b Current Planet
Habitability Zone Habitability Zone
Mass ( M sin i ): 1.94 ± 0.18 Jupiters
Periastron Distance: 0.69 AU
Mean Distance: 0.91 ± 0.104 AU
Apastron Distance: 1.12 AU
Orbital Period: 311.288 ± 2.1 Days
Eccentricity: 0.24 ± 0.07
Argument of Perihelion (omega):
343 °
Radial Velocity of Star: 30 m/s
Planet Appearance:
Sulfur stained clouds of water or H2SO4
Estimated Radius:
1.026 Jupiters 1
Estimated Periastron Temp: 358 Kelvin
Estimated Mean Temp: 312 Kelvin
Estimated Apastron Temp: 280 Kelvin
Temp from
Internal Heating :

131.944 Kelvins 2
Max Angular Star Size: 1.079°
Mean Angular Star Size: 0.818°
Min Angular Star Size: 0.664°
Gravitational Influence
(Hill Sphere):
0.076 AU / 11470000 km
Max Stable Prograde Moon Orbit: 0.027 AU / 4120000 km
Max Moon Mass: > 10 Earths 3,4
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: 1998
Detection Method: Doppler Spectroscopy
Discovered By: Kurster et al

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