Star system
BD+21 717
Economy
Government
Allegiance
Independent
Star type
Class K star Scoopable
Coordinates
-1.22 / -19.41 / -84.38
Permit required
No
Powerplay
Unoccupied
Powers
︎ BD+21 717 - Class K star
Body distance-Solar masses0.6875Solar radius0.8098︎ BD+21 717 1 - Helium-rich gas giant
Body distance838 LsRing/belt typeIcy (Pristine)Earth masses166.7210Radius61,752 kmGravity1.78 gSurface temperature137 K (-136°C/-212°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ BD+21 717 1 a - Icy body Landable
Body distance837 LsEarth masses0.0017Radius1,009 kmGravity0.07 gSurface temperature112 K (-161°C/-259°F)Surface pressure0.00 atmVolcanismCarbon dioxide geysersAtmosphereTerraforming︎ Selenium: 4.1%︎ Technetium: 0.5%︎ Niobium: 1.0%︎ Tin: 0.9%︎ Germanium: 4.1%︎ Zirconium: 1.6%︎ Carbon: 22.2%︎ Iron: 14.2%︎ Nickel: 10.7%︎ Phosphorus: 14.2%︎ Sulphur: 26.4%︎ BD+21 717 1 b - Icy body Landable
Body distance841 LsEarth masses0.0022Radius1,107 kmGravity0.07 gSurface temperature111 K (-162°C/-260°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Yttrium: 0.8%︎ Cadmium: 1.0%︎ Tin: 0.8%︎ Chromium: 6.0%︎ Manganese: 5.5%︎ Vanadium: 3.3%︎ Carbon: 21.0%︎ Iron: 13.3%︎ Nickel: 10.0%︎ Phosphorus: 13.4%︎ Sulphur: 24.9%︎ BD+21 717 1 d - Icy body Landable
Body distance841 LsEarth masses0.0011Radius869 kmGravity0.06 gSurface temperature110 K (-163°C/-261°F)Surface pressure0.00 atmVolcanismCarbon dioxide geysersAtmosphereTerraforming︎ Technetium: 0.5%︎ Niobium: 0.9%︎ Tin: 0.8%︎ Chromium: 6.0%︎ Manganese: 5.5%︎ Zinc: 3.6%︎ Carbon: 21.0%︎ Iron: 13.2%︎ Nickel: 10.0%︎ Phosphorus: 13.5%︎ Sulphur: 25.0%︎ BD+21 717 1 f - Icy body Landable
Body distance841 LsEarth masses0.0016Radius1,004 kmGravity0.07 gSurface temperature110 K (-164°C/-263°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Antimony: 0.8%︎ Selenium: 4.0%︎ Niobium: 0.9%︎ Tin: 0.8%︎ Chromium: 6.2%︎ Zirconium: 1.6%︎ Carbon: 21.8%︎ Iron: 13.7%︎ Nickel: 10.4%︎ Phosphorus: 13.9%︎ Sulphur: 25.9%︎ BD+21 717 1 c - Icy body Landable
Body distance842 LsEarth masses0.0016Radius1,006 kmGravity0.07 gSurface temperature110 K (-163°C/-261°F)Surface pressure0.00 atmVolcanismMinor Carbon dioxide geysersAtmosphereTerraforming︎ Tellurium: 1.0%︎ Molybdenum: 0.9%︎ Niobium: 0.9%︎ Arsenic: 1.8%︎ Chromium: 6.2%︎ Vanadium: 3.4%︎ Carbon: 21.8%︎ Iron: 13.7%︎ Nickel: 10.4%︎ Phosphorus: 14.0%︎ Sulphur: 25.9%︎ BD+21 717 1 e - Icy body Landable
Body distance844 LsEarth masses0.0016Radius1,001 kmGravity0.07 gSurface temperature110 K (-163°C/-262°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Selenium: 3.9%︎ Tellurium: 1.0%︎ Mercury: 0.6%︎ Niobium: 0.9%︎ Chromium: 5.9%︎ Manganese: 5.4%︎ Carbon: 20.9%︎ Iron: 13.2%︎ Nickel: 10.0%︎ Phosphorus: 13.4%︎ Sulphur: 24.9%︎ BD+21 717 2 - Gas giant with ammonia-based life
Body distance1,043 LsRing/belt typeIcy (Pristine)Earth masses294.2890Radius68,874 kmGravity2.52 gSurface temperature143 K (-130°C/-201°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ BD+21 717 3 - Gas giant with water-based life
Body distance1,445 LsRing/belt typeIcy (Pristine)Earth masses708.5860Radius75,200 kmGravity5.09 gSurface temperature200 K (-73°C/-99°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ BD+21 717 3 b - Icy body
Body distance1,437 LsRing/belt typeIcy (Pristine)Earth masses0.1423Radius4,515 kmGravity0.28 gSurface temperature93 K (-180°C/-292°F)Surface pressure4.14 atmVolcanismAtmosphereArgon-richTerraforming︎ BD+21 717 3 a - Icy body Landable
Body distance1,444 LsEarth masses0.0261Radius2,583 kmGravity0.16 gSurface temperature106 K (-167°C/-269°F)Surface pressure0.00 atmVolcanismMajor Water geysersAtmosphereTerraforming︎ Ruthenium: 0.8%︎ Selenium: 4.3%︎ Molybdenum: 0.8%︎ Niobium: 0.8%︎ Manganese: 5.0%︎ Zirconium: 1.4%︎ Carbon: 23.1%︎ Iron: 12.2%︎ Nickel: 9.2%︎ Phosphorus: 14.8%︎ Sulphur: 27.5%︎ BD+21 717 4 - Gas giant with water-based life
Body distance1,758 LsRing/belt typeIcy (Pristine)
Rocky (Pristine)Earth masses648.0100Radius73,736 kmGravity4.84 gSurface temperature180 K (-93°C/-136°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ BD+21 717 4 f - Icy body Landable
Body distance1,740 LsEarth masses0.0045Radius1,455 kmGravity0.09 gSurface temperature80 K (-193°C/-316°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Ruthenium: 0.7%︎ Selenium: 4.2%︎ Molybdenum: 0.8%︎ Tin: 0.7%︎ Manganese: 5.0%︎ Vanadium: 3.0%︎ Carbon: 22.8%︎ Iron: 12.0%︎ Nickel: 9.1%︎ Phosphorus: 14.6%︎ Sulphur: 27.1%︎ BD+21 717 4 g - Icy body Landable
Body distance1,747 LsRing/belt typeIcy (Pristine)Earth masses0.1654Radius4,736 kmGravity0.30 gSurface temperature79 K (-194°C/-318°F)Surface pressure0.04 atmVolcanismAtmosphereThin Argon-richTerraforming︎ Selenium: 4.3%︎ Yttrium: 0.7%︎ Niobium: 0.8%︎ Tungsten: 0.6%︎ Chromium: 5.3%︎ Zinc: 3.2%︎ Carbon: 22.9%︎ Iron: 11.7%︎ Nickel: 8.8%︎ Phosphorus: 14.6%︎ Sulphur: 27.2%︎ BD+21 717 4 c - Icy body Landable
Body distance1,755 LsEarth masses0.0040Radius1,401 kmGravity0.08 gSurface temperature88 K (-185°C/-301°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Selenium: 4.1%︎ Yttrium: 0.7%︎ Mercury: 0.5%︎ Niobium: 0.8%︎ Chromium: 5.3%︎ Manganese: 4.9%︎ Carbon: 22.3%︎ Iron: 11.8%︎ Nickel: 8.9%︎ Phosphorus: 14.3%︎ Sulphur: 26.5%︎ BD+21 717 4 d - Icy body Landable
Body distance1,755 LsEarth masses0.0092Radius1,835 kmGravity0.11 gSurface temperature85 K (-188°C/-307°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Selenium: 4.4%︎ Technetium: 0.4%︎ Cadmium: 1.0%︎ Niobium: 0.9%︎ Vanadium: 3.1%︎ Zirconium: 1.5%︎ Carbon: 23.6%︎ Iron: 12.6%︎ Nickel: 9.5%︎ Phosphorus: 15.1%︎ Sulphur: 28.0%︎ BD+21 717 4 e - Icy body Landable
Body distance1,757 LsEarth masses0.0043Radius1,434 kmGravity0.09 gSurface temperature82 K (-191°C/-312°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ Ruthenium: 0.7%︎ Mercury: 0.5%︎ Tungsten: 0.7%︎ Chromium: 5.4%︎ Manganese: 4.9%︎ Vanadium: 2.9%︎ Carbon: 22.6%︎ Iron: 11.9%︎ Nickel: 9.0%︎ Phosphorus: 14.5%︎ Sulphur: 26.9%︎ BD+21 717 4 a - Icy body Landable
Body distance1,757 LsEarth masses0.0041Radius1,405 kmGravity0.08 gSurface temperature99 K (-174°C/-282°F)Surface pressure0.00 atmVolcanismMajor Water geysersAtmosphereTerraforming︎ Yttrium: 0.7%︎ Mercury: 0.5%︎ Tungsten: 0.7%︎ Chromium: 5.4%︎ Manganese: 4.9%︎ Vanadium: 2.9%︎ Carbon: 22.6%︎ Iron: 11.9%︎ Nickel: 9.0%︎ Phosphorus: 14.5%︎ Sulphur: 26.9%︎ BD+21 717 4 b - Icy body Landable
Body distance1,760 LsEarth masses0.0048Radius1,480 kmGravity0.09 gSurface temperature93 K (-180°C/-292°F)Surface pressure0.00 atmVolcanismMajor Water geysersAtmosphereTerraforming︎ Polonium: 0.3%︎ Selenium: 4.3%︎ Cadmium: 0.9%︎ Molybdenum: 0.8%︎ Germanium: 3.6%︎ Vanadium: 3.0%︎ Carbon: 23.2%︎ Iron: 12.2%︎ Nickel: 9.2%︎ Phosphorus: 14.8%︎ Sulphur: 27.6%︎ BD+21 717 5 - Helium-rich gas giant
Body distance2,593 LsRing/belt typeIcy (Pristine)Earth masses326.5520Radius67,685 kmGravity2.90 gSurface temperature109 K (-164°C/-263°F)Surface pressure0.00 atmVolcanismAtmosphereTerraforming︎ BD+21 717 5 e - Icy body
Body distance2,571 LsEarth masses0.0739Radius3,660 kmGravity0.22 gSurface temperature65 K (-208°C/-342°F)Surface pressure2.26 atmVolcanismAtmosphereNitrogenTerraforming︎ BD+21 717 5 b - Icy body
Body distance2,592 LsEarth masses0.0032Radius1,293 kmGravity0.08 gSurface temperature202 K (-71°C/-96°F)Surface pressure28.52 atmVolcanismMajor Water geysersAtmosphereThick MethaneTerraforming︎ BD+21 717 5 a - Icy body
Body distance2,592 LsEarth masses0.0020Radius1,110 kmGravity0.07 gSurface temperature194 K (-79°C/-110°F)Surface pressure20.74 atmVolcanismMajor Water geysersAtmosphereThick MethaneTerraforming︎ BD+21 717 5 d - Icy body
Body distance2,593 LsEarth masses0.0029Radius1,254 kmGravity0.07 gSurface temperature110 K (-163°C/-261°F)Surface pressure0.27 atmVolcanismAtmosphereMethaneTerraforming︎ BD+21 717 5 c - Icy body
Body distance2,595 LsEarth masses0.0051Radius1,517 kmGravity0.09 gSurface temperature203 K (-71°C/-95°F)Surface pressure37.04 atmVolcanismAtmosphereThick MethaneTerraforming︎ BD+21 717 6 - Icy body
Body distance3,533 LsRing/belt typeIcy (Pristine)Earth masses34.9225Radius19,754 kmGravity3.64 gSurface temperature56 K (-217°C/-358°F)Surface pressure6.88 atmVolcanismWater geysersAtmosphereThick HeliumTerraforming