HD 10180 - System
Simulates HD 10180, one of the richest radial-velocity systems. At least six planets, mostly packed inside Earth's orbit, orbit this quiet Sun-like star.
Exoplanets
6-Planet System
Rare six-planet systems, typically compact and near-resonant. These packed architectures are sensitive tests of whether published elements remain stable under full n-body gravity.
HD 110067 - System
Simulates HD 110067, six sub-Neptunes in a resonant chain about 105 light-years away. Their periods follow a neat near-integer pattern around a bright K dwarf.
HD 191939 - System
Simulates HD 191939, a Sun-like G-type star of 0.81 solar masses, with its 6 planets on orbits from 8.9 days to 7.93 years.
HD 219134 - System
Simulates HD 219134, one of the nearest multi-planet systems. This K dwarf, 21 light-years away, has transiting super-Earths plus outer giants. At 21 light-years, several of its planets transit.
HD 34445 - System
Simulates HD 34445, a Sun-like G-type star of 1.07 solar masses, with its 6 planets on orbits from 49.2 days to 15.6 years.
K2-138 - System
Simulates K2-138, a chain of six sub-Neptunes near resonance, found by citizen scientists. The planets form an even, peas-in-a-pod sequence. The star is a K dwarf, and the chain was found in K2 data.
Kepler-11 - System
Simulates Kepler-11, the first compact six-planet system. Six low-density worlds orbit inside the distance of Venus and continually perturb one another.
Kepler-20 - System
Simulates Kepler-20, the first system with Earth-sized planets. Kepler-20 e and f alternate with larger worlds in a tight, mixed-size chain. Earth-sized e and f were announced together in 2011.
TOI-1136 - System
Simulates TOI-1136, a young compact six-planet system. The planets are still losing formation heat, so they look puffier than older worlds of the same mass.
TOI-178 - System
Simulates TOI-178, six planets in a Laplace-like resonant chain. Five outer worlds keep a repeating period pattern while differing wildly in density. The inner planet sits just outside the resonant chain.