It is located roughly 12.3 light years from Sol and is tidally locked to its star. Down is made habitable mainly due to its large moon called Sheila.
Once belonged to the Kzin Patriarchy before it was liberated by the humans. Humans have placed a Bussard Ramjet Field Generator in close orbit about Down's sun to destroy the Grog population, should they take threatening action against any sentient species. Ultraviolet lights are needed to grow any plants on Down due to the lack of good UV from its sun.