Star system

HR 4721︎

Economy
Colony
Government
Cooperative
Allegiance
Independent
Star type
Class G star Scoopable
Coordinates
145.69 / 59.81 / 78.53
Permit required
No
Powerplay
Unoccupied
Powers

  • ︎ HR 4721 A - Class G star

    Body distance
    -

    Solar masses
    0.9961
    Solar radius
    4.4480

    • ︎ HR 4721 A 1 - Metal-rich body Landable

      Body distance
      38 Ls

      Earth masses
      1.7023
      Radius
      5,649 km
      Gravity
      2.17 g
      Surface temperature
      1,615 K (1,342°C/2,447°F)
      Surface pressure
      0.00 atm
      Volcanism
      Silicate vapour geysers
      Atmosphere
      Terraforming

      ︎ Ruthenium: 2.0%︎ Cadmium: 2.5%︎ Tin: 2.1%︎ Chromium: 14.7%︎ Manganese: 13.5%︎ Vanadium: 8.0%︎ Iron: 32.6%︎ Nickel: 24.6%

    • ︎ HR 4721 A 2 - Metal-rich body Landable

      Body distance
      97 Ls

      Earth masses
      2.4123
      Radius
      6,227 km
      Gravity
      2.53 g
      Surface temperature
      1,019 K (746°C/1,375°F)
      Surface pressure
      0.00 atm
      Volcanism
      Major Silicate vapour geysers
      Atmosphere
      Terraforming

      ︎ Technetium: 1.4%︎ Mercury: 1.7%︎ Molybdenum: 2.5%︎ Germanium: 1.8%︎ Manganese: 15.8%︎ Vanadium: 9.4%︎ Iron: 38.4%︎ Nickel: 29.0%

    • ︎ HR 4721 A 3 - High metal content world

      Body distance
      521 Ls

      Earth masses
      1.6849
      Radius
      7,146 km
      Gravity
      1.34 g
      Surface temperature
      1,409 K (1,136°C/2,077°F)
      Surface pressure
      256.47 atm
      Volcanism
      Minor Metallic magma
      Atmosphere
      Hot Thick Carbon dioxide
      Terraforming

  • ︎ HR 4721 B - Class M star

    Body distance
    4,163 Ls

    Solar masses
    0.4063
    Solar radius
    0.5135

    • ︎ HR 4721 B 1 - Helium-rich gas giant

      Body distance
      3,967 Ls
      Ring/belt type
      Metal rich (Pristine)
      Rocky (Pristine)

      Earth masses
      54.3935
      Radius
      50,104 km
      Gravity
      0.88 g
      Surface temperature
      292 K (18°C/65°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      • ︎ HR 4721 B 1 c - Rocky body Landable

        Body distance
        3,966 Ls

        Earth masses
        0.0005
        Radius
        542 km
        Gravity
        0.06 g
        Surface temperature
        294 K (21°C/69°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Antimony: 1.2%︎ Selenium: 3.0%︎ Molybdenum: 1.3%︎ Tin: 1.2%︎ Germanium: 5.6%︎ Manganese: 8.1%︎ Carbon: 16.0%︎ Iron: 19.5%︎ Nickel: 14.8%︎ Phosphorus: 10.3%︎ Sulphur: 19.1%

      • ︎ HR 4721 B 1 b - Rocky body Landable

        Body distance
        3,966 Ls

        Earth masses
        0.0003
        Radius
        476 km
        Gravity
        0.06 g
        Surface temperature
        294 K (21°C/70°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Technetium: 0.7%︎ Mercury: 0.9%︎ Niobium: 1.4%︎ Arsenic: 2.5%︎ Chromium: 8.9%︎ Vanadium: 4.9%︎ Carbon: 16.2%︎ Iron: 19.8%︎ Nickel: 15.0%︎ Phosphorus: 10.4%︎ Sulphur: 19.3%

      • ︎ HR 4721 B 1 a - Rocky body Landable

        Body distance
        3,967 Ls

        Earth masses
        0.0017
        Radius
        837 km
        Gravity
        0.10 g
        Surface temperature
        295 K (21°C/70°F)
        Surface pressure
        0.00 atm
        Volcanism
        Metallic magma
        Atmosphere
        Terraforming

        ︎ Ruthenium: 1.2%︎ Cadmium: 1.5%︎ Niobium: 1.4%︎ Manganese: 8.2%︎ Vanadium: 4.9%︎ Zirconium: 2.3%︎ Carbon: 16.2%︎ Iron: 19.8%︎ Nickel: 14.9%︎ Phosphorus: 10.4%︎ Sulphur: 19.3%

    • ︎ HR 4721 B 3 - Helium-rich gas giant

      Body distance
      4,135 Ls
      Ring/belt type
      Metal rich (Pristine)

      Earth masses
      398.7590
      Radius
      71,693 km
      Gravity
      3.15 g
      Surface temperature
      302 K (28°C/83°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      • ︎ HR 4721 B 3 b - Icy body Landable

        Body distance
        4,131 Ls

        Earth masses
        0.0190
        Radius
        2,363 km
        Gravity
        0.14 g
        Surface temperature
        232 K (-41°C/-42°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Ruthenium: 0.7%︎ Selenium: 4.2%︎ Mercury: 0.5%︎ Molybdenum: 0.7%︎ Chromium: 5.1%︎ Manganese: 4.7%︎ Carbon: 22.6%︎ Iron: 11.4%︎ Nickel: 8.6%︎ Phosphorus: 14.5%︎ Sulphur: 26.9%

      • ︎ HR 4721 B 3 a - Rocky body

        Body distance
        4,135 Ls

        Earth masses
        0.0030
        Radius
        1,012 km
        Gravity
        0.12 g
        Surface temperature
        928 K (655°C/1,211°F)
        Surface pressure
        48.72 atm
        Volcanism
        Major Rocky magma
        Atmosphere
        Hot Thick Sulphur dioxide
        Terraforming

    • ︎ HR 4721 B 2 - Helium-rich gas giant

      Body distance
      4,323 Ls
      Ring/belt type
      Rocky (Pristine)

      Earth masses
      91.5015
      Radius
      55,503 km
      Gravity
      1.21 g
      Surface temperature
      272 K (-2°C/29°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      • ︎ HR 4721 B 2 a - Rocky body

        Body distance
        4,324 Ls

        Earth masses
        0.0006
        Radius
        605 km
        Gravity
        0.07 g
        Surface temperature
        826 K (553°C/1,028°F)
        Surface pressure
        16.97 atm
        Volcanism
        Atmosphere
        Hot Thick Water
        Terraforming