Orbital Reef is a low Earth orbit space station under development. It is designed by Blue Origin and Sierra Space for commercial space activities and space tourism uses. Blue Origin has referred to it as a "mixed-use business park". The companies released preliminary concepts for the station on 25 October 2021. The station is being designed to support 10 persons in 830 m³ of volume. As of March 2022, the station was projected to be operational by 2027.