Otter Spacecraft Inspects Dead Satellites

Starfish Space's Otter 24C spacecraft launched Oct. 1 from Vandenberg Space Force Base in California on NASA's SSPICY mission, NASA said, to inspect up to four dead U.S. objects in orbit.

The mission's full name is Small Spacecraft Propulsion and Inspection Capability, and NASA calls it SSPICY for short. According to NASA's release, it is a technology demonstration. The Otter spacecraft will approach up to four inoperable space objects of U.S. origin in low Earth orbit. NASA says those targets could be satellites or rocket bodies, the spent upper stages left behind after a launch.

The release does not give a launch time or name the rocket, so neither appears here.

The close-up work does not start right away. NASA says that in early 2027 the Otter will begin to navigate within hundreds of yards of each object. It will do this with autonomous guidance and control software, meaning the spacecraft makes its own calls with minimal input from ground controllers. NASA says computer vision and sensors let the software make real-time navigation decisions as the spacecraft closes in on each target.

At each stop, NASA says, Otter will collect information on the object's spin rate, its orientation and the condition of its surface. A dead satellite that is tumbling, or one with a damaged surface, is a very different job from one sitting still and intact.

Starfish Space developed and operates the Otter 24C, according to NASA. The agency's Small Spacecraft and Distributed Systems program, inside its Research and Technology Mission Directorate, funds and manages the demonstration. NASA also says its Small Business Innovation Research and Small Business Technology Transfer programs funded awards to Starfish Space for early development of the spacecraft's key technologies.

How it moves

Two pieces of hardware get a test here. NASA says an electric propulsion system will carry the spacecraft from one object to the next. It also says an articulating robotic boom, an arm that can swing, will test pointing the spacecraft's thrusters for precise maneuvering between different orbits.

NASA describes this as the first time these technologies will be tested together as an integrated system. It says that paves the way for future autonomous servicing and orbital debris inspection.

One detail worth reading twice: during SSPICY, NASA says, the Otter will not touch or dock with any satellite. This flight is about looking, not grabbing. The agency says the mission tests the technologies needed to one day enable missions that service or repair objects in orbit, or safely remove them by pulling them into Earth's atmosphere for disposal.

Why it matters

NASA's release lays out the problem. Rocket bodies and satellites that have problems or are no longer in service can break apart or collide with one another. That creates orbital debris, from large fragments down to small particles. NASA says thousands of satellites are launched each year to provide communications, weather forecasting, navigation and other services people rely on daily. In its words, keeping the space near Earth safe for operations is increasingly critical.

Knowing what a dead object is doing comes first. If a controller can see how fast a rocket body is spinning and what shape its surface is in, a later mission has a better chance of dealing with it safely. That is an inference from NASA's description of the inspection work, not a NASA statement.

What is next

The Otter is in orbit now, and NASA says the inspections begin in early 2027. The release gives no more exact date. It also does not say which four objects will be visited, so the targets are not known yet. NASA says the mission will approach up to four, which means the final count is not fixed in the release.

Docking, repair and removal are all later missions, not this one. For now, NASA says, the job is to get close, look carefully and prove the pieces work together.

Stay curious.

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