HD 82943

HD 82943 Planetary System

Yellow Main Sequence Star

 Location
Constellation:  Hydra
Right Ascension:  09 34 50.7361
Declination:  -12 07 46.365
Distance from Sol:  89.56 Light Years

 Basic Data
Spectral Type:  G0
Apparent Magnitude:  6.54
B-V Color:  0.623
Mass:  1.05 Solar Masses
Radius:  1.17 Solar Radii
Effective Temperature:  6010 Kelvin
Age:  5000 Million Years
Rotation:  20.9 days

 Habitability

Inner Edge of Habitability Zone:  0.63 AU
Outer Edge of Habitability Zone:  1.97 AU
Estimated Stellar Lifespan  8638 million years

System Components
(Mass in Multiples of Jupiter's Mass)

HD 82943 c

Sulfur Giant, Eccentric

  Basic Data
Parent Star:  HD 82943 (G0)
Discovery Status:  Confirmed
Planet Type:  Sulfur Giant, Eccentric
Habitability:  Planet at inner edge of Habitable Zone at Mean Orbital Distance

  Physical Data
Mass ( M sin i ):  0.88 Jupiters
Periastron Distance:  0.33 AU
Mean Distance:  0.73 AU
Apastron Distance:  1.12 AU
Orbital Period:  221.6 Days
Eccentricity:  0.54
Radial Velocity of Star:  34 m/s

  Inferred Properties
Average Angular Size of Star:  0.852°
Planet Appearance:
 Yellowish H2SO4 clouds
Periastron Temp:  485 Kelvin
Mean Temp:  329 Kelvin
Apastron Temp:  265 Kelvin

  Discovery Facts
Year Discovered:  2001
Detection Method:  Doppler Spectroscopy
Discovered By:  Michel Mayor, Dominique Naef, Francesco Pepe, Didier Queloz, Nuno Santos, Stephane Udry and Michel Burnet
 

HD 82943 b

Water Giant, Eccentric

 Basic Data
Parent Star:  HD 82943 (G0)
Discovery Status:  Confirmed
Planet Type:  Water Giant, Eccentric
Habitability:  Planet at Earthlike Temperatures at Mean Orbital Distance

Physical Data
Mass ( M sin i ):  1.63 Jupiters
Periastron Distance:  0.68 AU
Mean Distance:  1.16 AU
Apastron Distance:  1.63 AU
Orbital Period:  444.6 Days
Eccentricity:  0.41
Radial Velocity of Star:  46 m/s

  Inferred Properties
Average Angular Size of Star:  0.536°
Planet Appearance:
 White water ice clouds
Periastron Temp:  339 Kelvin
Mean Temp:  261 Kelvin
Apastron Temp:  219 Kelvin

Discovery Facts
 Year Discovered:  2000
Detection Method:  Doppler Spectroscopy
Discovered By:  Michel Mayor, Dominique Naef, Francesco Pepe, Didier Queloz,
Nuno Santos, Stephane Udry and Michel Burnet

Planetary Orbits Around HD 82943

Position In Hydra