Estuary was once a human colony.
History
After 2535, but before the Fall of Reach, the Fleet of Particular Justice found the planet, attacked it, and proceeded to glass it. It is currently unknown if there were any survivors.[1]
Physical Aspects
The planet appears to have at least one large continent. The continent appears to be almost entirely desert. The northern part of the continent appears to have a more reddish hue to it. There also appears to be one large ocean on the planet.[1]