Star system
HD 4639
Economy
Government
Allegiance
Independent
Star type
Class K star (orange giant) Scoopable
Coordinates
-1497.84 / -3504.16 / -959.16
Permit required
No
︎ HD 4639 - Class K star (orange giant)
Body distance-Solar masses0.6680Solar radius68.8912︎ HD 4639 1 - Metal-rich body
Body distance471 LsEarth masses1.1842Radius5,092 kmGravity1.86 gSurface temperature2,210 K (1,936°C/3,518°F)Surface pressure1,955.79 atmVolcanismMinor Metallic magmaAtmosphereHot Thick Silicate vapourTerraforming︎ HD 4639 2 - High metal content world
Body distance786 LsEarth masses5.0577Radius9,649 kmGravity2.21 gSurface temperature3,865 K (3,592°C/6,498°F)Surface pressure11,626.15 atmVolcanismMajor Silicate vapour geysersAtmosphereHot Thick Carbon dioxide-richTerraforming︎ HD 4639 3 - High metal content world
Body distance1,310 LsEarth masses3.7111Radius8,873 kmGravity1.92 gSurface temperature3,297 K (3,023°C/5,474°F)Surface pressure2,991.04 atmVolcanismMetallic magmaAtmosphereHot Thick Carbon dioxide-richTerraforming︎ HD 4639 4 c - Rocky body Landable
Body distance2,344 LsEarth masses0.0002Radius410 kmGravity0.05 gSurface temperature662 K (389°C/731°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Polonium: 0.5%︎ Selenium: 3.0%︎ Cadmium: 1.5%︎ Tin: 1.2%︎ Chromium: 8.7%︎ Germanium: 5.6%︎ Carbon: 16.0%︎ Iron: 19.4%︎ Nickel: 14.7%︎ Phosphorus: 10.3%︎ Sulphur: 19.0%︎ HD 4639 4 b - Rocky body Landable
Body distance2,344 LsEarth masses0.0003Radius451 kmGravity0.05 gSurface temperature662 K (389°C/731°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Tellurium: 1.4%︎ Cadmium: 1.4%︎ Tungsten: 1.0%︎ Chromium: 8.3%︎ Manganese: 7.6%︎ Vanadium: 4.5%︎ Carbon: 15.2%︎ Iron: 18.5%︎ Nickel: 14.0%︎ Phosphorus: 9.8%︎ Sulphur: 18.1%︎ HD 4639 4 f - Rocky body Landable
Body distance2,345 LsEarth masses0.0002Radius440 kmGravity0.05 gSurface temperature662 K (389°C/731°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Polonium: 0.5%︎ Mercury: 0.9%︎ Tungsten: 1.1%︎ Germanium: 5.8%︎ Manganese: 8.2%︎ Zirconium: 2.3%︎ Carbon: 16.4%︎ Iron: 19.9%︎ Nickel: 15.0%︎ Phosphorus: 10.5%︎ Sulphur: 19.5%︎ HD 4639 4 i - Rocky body Landable
Body distance2,345 LsEarth masses0.0002Radius419 kmGravity0.05 gSurface temperature662 K (389°C/731°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Antimony: 1.2%︎ Selenium: 3.1%︎ Cadmium: 1.6%︎ Mercury: 0.9%︎ Vanadium: 5.0%︎ Zinc: 5.5%︎ Carbon: 16.7%︎ Iron: 20.2%︎ Nickel: 15.3%︎ Phosphorus: 10.7%︎ Sulphur: 19.8%︎ HD 4639 4 a - Rocky body Landable
Body distance2,346 LsEarth masses0.0005Radius568 kmGravity0.07 gSurface temperature662 K (389°C/731°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Tellurium: 1.4%︎ Mercury: 0.8%︎ Molybdenum: 1.2%︎ Chromium: 8.3%︎ Germanium: 5.3%︎ Manganese: 7.6%︎ Carbon: 15.2%︎ Iron: 18.4%︎ Nickel: 13.9%︎ Phosphorus: 9.7%︎ Sulphur: 18.1%︎ HD 4639 4 - High metal content world
Body distance2,346 LsRing/belt typeMetal rich (Pristine)Earth masses5.9233Radius10,055 kmGravity2.38 gSurface temperature2,473 K (2,200°C/3,992°F)Surface pressure861.41 atmVolcanismMajor Silicate vapour geysersAtmosphereHot Thick Carbon dioxideTerraforming︎ HD 4639 4 h - Rocky body Landable
Body distance2,346 LsEarth masses0.0002Radius444 kmGravity0.05 gSurface temperature662 K (389°C/731°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Antimony: 1.2%︎ Molybdenum: 1.2%︎ Tin: 1.1%︎ Germanium: 5.5%︎ Manganese: 7.9%︎ Zinc: 5.2%︎ Carbon: 15.7%︎ Iron: 19.1%︎ Nickel: 14.4%︎ Phosphorus: 10.0%︎ Sulphur: 18.7%︎ HD 4639 4 d - Rocky body Landable
Body distance2,349 LsEarth masses0.0003Radius471 kmGravity0.06 gSurface temperature662 K (389°C/731°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Yttrium: 1.1%︎ Molybdenum: 1.2%︎ Niobium: 1.3%︎ Germanium: 5.5%︎ Manganese: 7.9%︎ Zinc: 5.2%︎ Carbon: 15.7%︎ Iron: 19.0%︎ Nickel: 14.4%︎ Phosphorus: 10.0%︎ Sulphur: 18.6%︎ HD 4639 4 e - Rocky body Landable
Body distance2,349 LsEarth masses0.0003Radius451 kmGravity0.05 gSurface temperature662 K (389°C/731°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Ruthenium: 1.2%︎ Mercury: 0.8%︎ Niobium: 1.3%︎ Chromium: 8.5%︎ Germanium: 5.5%︎ Zinc: 5.2%︎ Carbon: 15.6%︎ Iron: 19.0%︎ Nickel: 14.3%︎ Phosphorus: 10.0%︎ Sulphur: 18.6%︎ HD 4639 4 g - Rocky body Landable
Body distance2,351 LsEarth masses0.0003Radius482 kmGravity0.06 gSurface temperature662 K (389°C/731°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Antimony: 1.1%︎ Molybdenum: 1.2%︎ Tin: 1.1%︎ Chromium: 8.4%︎ Manganese: 7.7%︎ Vanadium: 4.6%︎ Carbon: 15.3%︎ Iron: 18.6%︎ Nickel: 14.1%︎ Phosphorus: 9.8%︎ Sulphur: 18.2%