A spent SpaceX Falcon 9 rocket stage is projected to impact the Moon on August 5, 2026. Astronomers expect the collision, occurring near the lunar Einstein Crater, to provide a rare opportunity to observe an artificial impact, potentially revealing new data about lunar regolith and the dynamics of space debris.
The Drift of a Spent Rocket Stage
The object at the center of this event is a spent upper stage of a SpaceX Falcon 9 rocket, cataloged as 2025-010D. Launched on January 15, 2025, from NASA’s Kennedy Space Center, the mission successfully deployed two private robotic landers: Firefly Aerospace’s Blue Ghost and ispace’s Resilience. Following the delivery, the rocket’s upper stage failed to reenter Earth’s atmosphere, instead entering a highly elliptical orbit that eventually placed it on a collision course with the Moon.
For more than a year, the roughly 12-meter-long, 4,000-kilogram metal shell has been tumbling through space. Bill Gray, an independent orbital analyst and creator of the Project Pluto software, first identified the trajectory and alerted the scientific community to the impending impact. Tracking the object has proven difficult due to the influence of solar radiation pressure, a subtle force that affects the rocket’s path in ways that are difficult to forecast.
Impact Expectations Near Einstein Crater
The collision is scheduled for August 5, 2026, at approximately 06:35 UTC, according to Newsweek. The rocket is expected to strike the lunar surface at a velocity of roughly 5,400 mph (8,750 kilometers per hour). Because the stage is a hollow metal structure rather than a dense, solid asteroid, simulations suggest it will crumple on impact, likely carving out a crater between 20 and 30 meters wide.
For more on this story, see SpaceX Launches 27 Starlink Satellites from Vandenberg on Falcon 9 Rocket.
Astronomers are particularly interested in the potential for an ejecta plume. As the rocket impacts the sunlit terrain near the Moon’s eastern limb, it is expected to kick up significant amounts of lunar regolith. It will excavate that out of the crater and this may create a plume that will be illuminated by the sun,
said William Cooke, program manager of NASA’s Meteoroid Environment Office at Marshall Space Flight Center.
Scientific Opportunities for Observation
The event serves as an open invitation for both professional and amateur astronomers to document a real-time lunar impact. While no artificial or natural impact flashes have been previously recorded on the sunlit surface of the Moon, researchers believe this collision offers a unique set of circumstances. Potential observables from this event include the flash at the time of impact,
noted scientists involved in the primary tracking effort, as reported by Newsweek.
The Impact Flash! program, facilitated by NASA’s Solar System Exploration Research Virtual Institute (SSERVI), is encouraging citizen scientists to participate. One of the things that is really important here with this impact that is coming up is it serves as a reminder to us that the moon is a dynamic environment. We think of it as being static. It is not. It is being whacked. It is changing,
said Brian Day, SSERVI’s lead for citizen science and community development.
This follows our earlier report, SpaceX Marks Milestone with 600th Reusable Falcon Booster Flight.
Safety and Future Lunar Exploration
Despite the spectacle, experts emphasize that the impact poses no threat to Earth. The debris of this small impact will remain at the moon,
explained Steven A. Hauck, chair of the Department of Earth, Environmental and Planetary Sciences at Case Western Reserve University. Hauck noted that while the event itself has little impact on Earth, it serves as a valuable learning opportunity for future missions, particularly those involving lunar seismometers designed to study the Moon’s interior.
Tracking this specific piece of space junk also provides insight into the hazards of artificial debris in lunar orbit—a growing concern as space agencies plan for more frequent human missions and permanent lunar bases. Usually, these are natural asteroids, but because scientists know when and where the impact will happen, as well as the mass and velocity of the SpaceX booster, observations of this impact can help us improve our understanding of the properties and number of very small asteroids that hit the moon when we see their impact flashes,
Hauck added.
Read also: NASA Shifts SunRISE Mission to Falcon Heavy After Vulcan Anomaly.
Visibility and Tracking Uncertainties
Whether the impact will be visible remains a point of debate among the tracking community. Because the rocket is traveling at such high speeds and the target location is near the lunar limb, observations may be subtle or even impossible to capture. Gray, who has tracked the object since its 2025 launch, admitted that his confidence in the visibility of the event has fluctuated over time.
I’ve gone from ‘probably’ to ‘probably not,’ and more recently, to ‘maybe,’
said Bill Gray, creator of the Project Pluto software. Despite the uncertainty, the consensus among observers is that the attempt is worth the effort, as it provides a controlled environment to test tracking methods and refine the science of lunar impact monitoring for future, more complex missions.
Worth a look
