T+329: Katalyst Space and the Mission to Boost Swift (with Ghonhee Lee, Founder and CEO)

In this episode of Main Engine Cut Off, host Anthony Colangelo interviews Ganhee Lee, founder and CEO of Catalyst Space, about the company's groundbreaking mission to reboost NASA's Swift Observatory—a critical space science satellite facing imminent deorbit due to orbital decay. With just nine months from contract award to launch, Catalyst is executing an ambitious, fast-paced mission using its Link spacecraft, a 400-kilogram robotic vehicle designed to dock with Swift, stabilize it, and boost it to a higher orbit to extend its science mission by up to a decade. The mission, funded at $30 million and launching via a Pegasus air-launched rocket from Kwajalein Atoll, represents a bold departure from traditional NASA timelines and a testament to the power of startup agility. Lee shares how Catalyst overcame technical, logistical, and financial hurdles by leveraging in-house expertise, an acquisition of Atomos, and a 'go-fast' mindset that prioritizes mission success over perfection. The episode explores the broader implications of this mission, including the potential for future robotic servicing of Hubble, derelict satellites, and even lunar infrastructure, positioning Catalyst as a pioneer in on-orbit servicing and reusable space assets. The conversation also delves into the technical innovations behind the Link spacecraft, including its three lightweight, truss-based robot arms with 3-DOF grippers designed to grasp Swift’s unique back-end structure—despite limited visual data. The team is using real-time computer vision and multiple inspection flybys to compensate for missing engineering photos. Lee emphasizes that this mission is not just about saving Swift but proving a new business model: a reusable, modular, refuelable fleet of spacecraft (Nexus) capable of servicing multiple customers across LEO, GEO, and beyond. This 'space truck' approach, combining high Delta-V, robotic arms, and modular payloads, could revolutionize space operations by enabling in-orbit assembly, refueling, and defense applications. The episode closes with a detailed mission timeline—launching in late June 2026, followed by a 3–4 week commissioning and rendezvous phase, culminating in a docking and 4–6 week reboost burn. The mission stands as a powerful demonstration of how commercial innovation can accelerate NASA’s capabilities and redefine what’s possible in space.