The highlight is Whanu GO-R c5-1 B 4, a 49-Earth-mass Class I gas giant surrounded by two distinct, pristine rings: a narrow, metal-rich inner ring followed immediately by a much broader, icy ring. Five icy moons accompany the planet, several of them geologically active. But B 4 a and B 4 b are unlike the others.

B 4 a and B 4 b form an extraordinarily tight binary moon pair. Both orbit a common barycentre, and that barycentre in turn orbits B 4 at roughly 149,600 kilometres from the planet’s centre, only about 22,000 kilometres beyond the outer edge of its icy ring. The two moons complete an orbit around one another every 8 hours and 44 minutes.

Their average centre-to-centre separation is only about 3,590 kilometres. B 4 a has a radius of roughly 1,031 kilometres and B 4 b about 1,275 kilometres, leaving on average only 1,290 kilometres of empty space between their surfaces. Both worlds are landable, both sit near 78 K, and both show water-geyser volcanism and geological signals.

The visual effect from either surface should be remarkable. From the side of B 4 a facing its companion, B 4 b can span roughly 60 degrees of sky when overhead. Behind the pair lies the enormous bulk of ringed B 4. The binary’s shared orbit places them just beyond the planetary rings, making the B 4 system a particularly strong candidate for surface sightseeing and an orbital curiosity.

Whanu GO-R c5-1

• 🌌 Whanu GO-R c5-1 None · None · anarchy
  • ⊕ Barycenter
    • ✨ Whanu GO-R c5-1 A
      K · Distance: 0 Ls · Radius: 483,484 km · Temp: 4,403 K · Orbit: 143,865.1 d · Day: 2.6 d
      first discovery
      Rocky ring
      • 🪐 Whanu GO-R c5-1 A 1
        Gas giant with water based life · Distance: 450 Ls · Mass: 356 M⊕ · Radius: 73,436 km · Gravity: 2.68 g · Temp: 225 K · Orbit: 413.7 d · Day: 414.5 d
        first discovery
        Rocky ring
        • ❍ Whanu GO-R c5-1 A 1 c
          Icy body · Distance: 445 Ls · Mass: 0.00145 M⊕ · Radius: 988 km · Gravity: 0.06 g · Temp: 167 K · Orbit: 19.1 d · Day: 19.1 d
          landable · first discovery · Materials: sulphur 26%, carbon 22%, phosphorus 14%, iron 13%
        • ❍ Whanu GO-R c5-1 A 1 a
          Rocky body · Distance: 450 Ls · Mass: 0.000249 M⊕ · Radius: 444 km · Gravity: 0.05 g · Temp: 192 K · Orbit: 4.4 d · Day: 4.4 d
          landable · first discovery · Materials: iron 19%, sulphur 18%, carbon 15%, nickel 14%
        • ❍ Whanu GO-R c5-1 A 1 d
          Icy body · Distance: 451 Ls · Mass: 0.00195 M⊕ · Radius: 1,089 km · Gravity: 0.07 g · Temp: 166 K · Orbit: 30.5 d · Day: 30.5 d
          landable · first discovery · Materials: sulphur 26%, carbon 22%, phosphorus 14%, iron 13%
        • ❍ Whanu GO-R c5-1 A 1 b
          Icy body · Distance: 453 Ls · Mass: 0.00119 M⊕ · Radius: 886 km · Gravity: 0.06 g · Temp: 168 K · Orbit: 11.3 d · Day: 11.3 d
          landable · first discovery · Materials: sulphur 25%, carbon 21%, iron 15%, phosphorus 14%
      • ❍ Whanu GO-R c5-1 A 2
        Gas giant with water based life · Distance: 641 Ls · Mass: 251 M⊕ · Radius: 69,898 km · Gravity: 2.09 g · Temp: 182 K · Orbit: 703.6 d · Day: 1.3 d
        first discovery
        • ❍ Whanu GO-R c5-1 A 2 d
          Icy body · Distance: 638 Ls · Mass: 0.00609 M⊕ · Radius: 1,616 km · Gravity: 0.09 g · Temp: 287 K · Orbit: 19.5 d · Day: 19.5 d
          Atmosphere: thick carbon dioxide atmosphere · first discovery
        • ❍ Whanu GO-R c5-1 A 2 b
          Icy body · Distance: 642 Ls · Mass: 0.0079 M⊕ · Radius: 1,759 km · Gravity: 0.10 g · Temp: 537 K · Orbit: 3.4 d · Day: 3.4 d
          Atmosphere: hot thick carbon dioxide atmosphere · Volcanism: minor carbon dioxide geysers volcanism · first discovery
        • ❍ Whanu GO-R c5-1 A 2 c
          Icy body · Distance: 642 Ls · Mass: 0.0121 M⊕ · Radius: 2,022 km · Gravity: 0.12 g · Temp: 307 K · Orbit: 7.7 d · Day: 7.7 d
          Atmosphere: thick carbon dioxide atmosphere · first discovery
        • ❍ Whanu GO-R c5-1 A 2 a
          Icy body · Distance: 643 Ls · Mass: 0.00304 M⊕ · Radius: 1,285 km · Gravity: 0.07 g · Temp: 511 K · Orbit: 2.0 d · Day: 2.0 d
          Atmosphere: hot thick carbon dioxide atmosphere · Volcanism: major water geysers volcanism · first discovery
        • ❍ Whanu GO-R c5-1 A 2 e
          Icy body · Distance: 648 Ls · Mass: 0.00818 M⊕ · Radius: 1,780 km · Gravity: 0.10 g · Temp: 293 K · Orbit: 32.2 d · Day: 32.2 d
          Atmosphere: thick carbon dioxide atmosphere · first discovery
      • ⊕ Barycenter
        • ❍ Whanu GO-R c5-1 A 3
          Sudarsky class I gas giant · Distance: 840 Ls · Mass: 39.5 M⊕ · Radius: 47,163 km · Gravity: 0.72 g · Temp: 138 K · Orbit: 411.3 d · Day: 23.7 h
          first discovery
          • ❍ Whanu GO-R c5-1 A 3 d
            Icy body · Distance: 839 Ls · Mass: 0.0005 M⊕ · Radius: 702 km · Gravity: 0.04 g · Temp: 123 K · Orbit: 20.4 d · Day: 20.4 d
            landable · first discovery · Materials: sulphur 27%, carbon 23%, phosphorus 15%, iron 12%
          • ❍ Whanu GO-R c5-1 A 3 b
            Icy body · Distance: 840 Ls · Mass: 0.000388 M⊕ · Radius: 645 km · Gravity: 0.04 g · Temp: 123 K · Orbit: 6.7 d · Day: 6.7 d
            landable · first discovery · Materials: sulphur 28%, carbon 23%, phosphorus 15%, iron 12%
          • ❍ Whanu GO-R c5-1 A 3 a
            Icy body · Distance: 840 Ls · Mass: 0.00168 M⊕ · Radius: 1,049 km · Gravity: 0.06 g · Temp: 123 K · Orbit: 3.1 d · Day: 3.1 d
            Volcanism: minor carbon dioxide geysers volcanism · landable · first discovery · Materials: sulphur 28%, carbon 23%, phosphorus 15%, iron 12%
            Geological ×2
          • ❍ Whanu GO-R c5-1 A 3 c
            Icy body · Distance: 842 Ls · Mass: 0.000492 M⊕ · Radius: 698 km · Gravity: 0.04 g · Temp: 123 K · Orbit: 11.6 d · Day: 11.6 d
            landable · first discovery · Materials: sulphur 27%, carbon 22%, phosphorus 14%, iron 12%
          • ❍ Whanu GO-R c5-1 A 3 e
            Icy body · Distance: 844 Ls · Mass: 0.000435 M⊕ · Radius: 670 km · Gravity: 0.04 g · Temp: 122 K · Orbit: 35.1 d · Day: 35.1 d
            landable · first discovery · Materials: sulphur 28%, carbon 23%, phosphorus 15%, iron 13%
        • ❍ Whanu GO-R c5-1 A 4
          Ammonia world · Distance: 868 Ls · Mass: 4.26 M⊕ · Radius: 12,898 km · Gravity: 1.04 g · Temp: 136 K · Orbit: 411.3 d · Day: 2.0 d
          first discovery
      • 🪐 Whanu GO-R c5-1 A 5
        Icy body · Distance: 1,097 Ls · Mass: 6.47 M⊕ · Radius: 13,243 km · Gravity: 1.50 g · Temp: 1,404 K · Orbit: 1,580.8 d · Day: 1.3 d
        Atmosphere: hot thick water atmosphere · Volcanism: major water geysers volcanism · first discovery
        Icy ring
    • ✨ Whanu GO-R c5-1 B
      M · Distance: 28,310 Ls · Radius: 405,779 km · Temp: 3,463 K · Orbit: 143,865.1 d · Day: 2.7 d
      first discovery
      Metal Rich ring
      • ❍ Whanu GO-R c5-1 B 1
        Rocky ice body · Distance: 28,019 Ls · Mass: 0.979 M⊕ · Radius: 6,345 km · Gravity: 0.99 g · Temp: 192 K · Orbit: 280.5 d · Day: 1.9 d
        Atmosphere: thick argon rich atmosphere · first discovery
      • ❍ Whanu GO-R c5-1 B 3
        Rocky ice body · Distance: 28,395 Ls · Mass: 1.42 M⊕ · Radius: 7,944 km · Gravity: 0.91 g · Temp: 478 K · Orbit: 676.8 d · Day: 1.2 d
        Atmosphere: thick ammonia rich atmosphere · Volcanism: water geysers volcanism · first discovery
      • ❍ Whanu GO-R c5-1 B 2
        High metal content body · Distance: 28,609 Ls · Mass: 1.3 M⊕ · Radius: 6,570 km · Gravity: 1.23 g · Temp: 396 K · Orbit: 378.4 d · Day: 3.1 d
        Atmosphere: thick methane atmosphere · first discovery
        • ❍ Whanu GO-R c5-1 B 2 a
          Icy body · Distance: 28,610 Ls · Mass: 0.0802 M⊕ · Radius: 3,605 km · Gravity: 0.25 g · Temp: 339 K · Orbit: 43.0 d · Day: 44.3 d
          Atmosphere: thick carbon dioxide atmosphere · first discovery
      • 🪐 Whanu GO-R c5-1 B 4
        Sudarsky class I gas giant · Distance: 29,867 Ls · Mass: 49.4 M⊕ · Radius: 51,135 km · Gravity: 0.77 g · Temp: 89 K · Orbit: 3,080.1 d · Day: 19.6 h
        first discovery
        Metal Rich ringIcy ring
        • ❍ Whanu GO-R c5-1 B 4 c
          Icy body · Distance: 29,866 Ls · Mass: 0.00167 M⊕ · Radius: 1,046 km · Gravity: 0.06 g · Temp: 78 K · Orbit: 2.1 d · Day: 2.1 d
          Volcanism: major water geysers volcanism · landable · first discovery · Materials: sulphur 28%, carbon 23%, phosphorus 15%, iron 13%
          Geological ×2
        • ⊕ Barycenter
          • ❍ Whanu GO-R c5-1 B 4 a
            Icy body · Distance: 29,867 Ls · Mass: 0.00159 M⊕ · Radius: 1,031 km · Gravity: 0.06 g · Temp: 78 K · Orbit: 8.7 h · Day: 11.4 h
            Volcanism: water geysers volcanism · landable · first discovery · Materials: sulphur 27%, carbon 23%, phosphorus 15%, iron 12%
            Geological ×2
          • ❍ Whanu GO-R c5-1 B 4 b
            Icy body · Distance: 29,867 Ls · Mass: 0.00305 M⊕ · Radius: 1,275 km · Gravity: 0.08 g · Temp: 78 K · Orbit: 8.7 h · Day: 15.8 h
            Volcanism: water geysers volcanism · landable · first discovery · Materials: sulphur 27%, carbon 23%, phosphorus 15%, iron 13%
            Geological ×2
        • ❍ Whanu GO-R c5-1 B 4 e
          Icy body · Distance: 29,867 Ls · Mass: 0.00113 M⊕ · Radius: 919 km · Gravity: 0.05 g · Temp: 77 K · Orbit: 5.8 d · Day: 5.8 d
          landable · first discovery · Materials: sulphur 27%, carbon 23%, phosphorus 15%, iron 12%
        • ❍ Whanu GO-R c5-1 B 4 d
          Icy body · Distance: 29,868 Ls · Mass: 0.00114 M⊕ · Radius: 922 km · Gravity: 0.05 g · Temp: 77 K · Orbit: 3.7 d · Day: 3.7 d
          Volcanism: major water magma volcanism · landable · first discovery · Materials: sulphur 28%, carbon 23%, phosphorus 15%, iron 13%
          Geological ×2
      • 🪐 Whanu GO-R c5-1 B 5
        Sudarsky class I gas giant · Distance: 30,554 Ls · Mass: 22.1 M⊕ · Radius: 38,066 km · Gravity: 0.62 g · Temp: 74 K · Orbit: 5,734.5 d · Day: 1.3 d
        first discovery
        Icy ring
        • ❍ Whanu GO-R c5-1 B 5 f
          Icy body · Distance: 30,553 Ls · Mass: 0.000606 M⊕ · Radius: 748 km · Gravity: 0.04 g · Temp: 98 K · Orbit: 94.7 d · Day: 94.7 d
          Atmosphere: thin methane atmosphere · landable · first discovery · Materials: sulphur 28%, carbon 23%, phosphorus 15%, iron 13%
          Biological ×1
        • ❍ Whanu GO-R c5-1 B 5 c
          Icy body · Distance: 30,554 Ls · Mass: 0.000545 M⊕ · Radius: 721 km · Gravity: 0.04 g · Temp: 97 K · Orbit: 22.7 d · Day: 22.7 d
          Atmosphere: thin methane atmosphere · landable · first discovery · Materials: sulphur 27%, carbon 23%, phosphorus 15%, iron 12%
          Biological ×1
        • ❍ Whanu GO-R c5-1 B 5 d
          Icy body · Distance: 30,554 Ls · Mass: 0.000715 M⊕ · Radius: 789 km · Gravity: 0.05 g · Temp: 99 K · Orbit: 38.4 d · Day: 38.4 d
          Atmosphere: methane atmosphere · first discovery
        • ❍ Whanu GO-R c5-1 B 5 b
          Icy body · Distance: 30,554 Ls · Mass: 0.00036 M⊕ · Radius: 629 km · Gravity: 0.04 g · Temp: 95 K · Orbit: 10.3 d · Day: 10.3 d
          Atmosphere: thin methane atmosphere · landable · first discovery · Materials: sulphur 27%, carbon 23%, phosphorus 15%, iron 12%
          Biological ×1
        • ❍ Whanu GO-R c5-1 B 5 a
          Icy body · Distance: 30,554 Ls · Mass: 0.000323 M⊕ · Radius: 607 km · Gravity: 0.04 g · Temp: 119 K · Orbit: 6.2 d · Day: 6.2 d
          Atmosphere: methane atmosphere · first discovery
        • ❍ Whanu GO-R c5-1 B 5 e
          Icy body · Distance: 30,555 Ls · Mass: 0.000992 M⊕ · Radius: 880 km · Gravity: 0.05 g · Temp: 101 K · Orbit: 56.0 d · Day: 56.0 d
          Atmosphere: methane atmosphere · first discovery
  • ❍ Whanu GO-R c5-1 A A Belt Cluster 2
    Planet · Distance: 4 Ls
    first discovery
  • ❍ Whanu GO-R c5-1 A A Belt Cluster 1
    Planet · Distance: 4 Ls
    first discovery
  • ❍ Whanu GO-R c5-1 A A Belt Cluster 3
    Planet · Distance: 5 Ls
    first discovery
  • ❍ Whanu GO-R c5-1 B A Belt Cluster 5
    Planet · Distance: 28,306 Ls
    first discovery
  • ❍ Whanu GO-R c5-1 B A Belt Cluster 7
    Planet · Distance: 28,306 Ls
    first discovery
  • ❍ Whanu GO-R c5-1 B A Belt Cluster 3
    Planet · Distance: 28,308 Ls
    first discovery
  • ❍ Whanu GO-R c5-1 B A Belt Cluster 1
    Planet · Distance: 28,309 Ls
    first discovery
  • ❍ Whanu GO-R c5-1 B A Belt Cluster 8
    Planet · Distance: 28,311 Ls
    first discovery
  • ❍ Whanu GO-R c5-1 B A Belt Cluster 9
    Planet · Distance: 28,311 Ls
    first discovery
  • ❍ Whanu GO-R c5-1 B A Belt Cluster 4
    Planet · Distance: 28,312 Ls
    first discovery
  • ❍ Whanu GO-R c5-1 B A Belt Cluster 6
    Planet · Distance: 28,313 Ls
    first discovery
  • ❍ Whanu GO-R c5-1 B A Belt Cluster 2
    Planet · Distance: 28,315 Ls
    first discovery