HD 23472 is an orange K-type dwarf (about 0.67 solar masses, 4,684 K, 0.71 solar radii), 39.0 light-years from Earth. The system hosts 5 confirmed planets on orbits ranging from 4.0 days to 29.8 days. With 5 confirmed worlds, HD 23472 is a densely packed system whose resonances, spacing, and formation history are active research topics. Mutual gravitational tugs between the planets can slowly reshape their orbits, preserving clues to the system's assembly. HD 23472 d skims its star closer than Mercury orbits the Sun.