Jupiter is a proposed space tug spacecraft concept by Lockheed Martin, which was initially conceptualized as a 2015 bid proposal to NASA for an International Space Station (ISS) cargo resupply services contract. The proposal was not accepted by NASA, and future Lockheed plans for the concept are unknown.
The conceptual spacecraft is designed to operate in orbit indefinitely, and be refueled from cargo pods delivered to the craft. Other proposed uses for the technology include on-orbit space tug services, according to company officials in a March 2015 presentation made in Washington, D.C.[1]