Abandoned Falcon 9 Stage Set To Slam Moon

The rocket stage wasn't supposed to be there. That's the part that stuck with people. What Happened Back in 2022 A SpaceX Falcon 9 second stage — left over from the DSCOVR launch in February 2015 — had been drifting in a chaotic Earth-Moon orbit for seven years. No one meant to leave it there.

The mission went fine. The satellite reached its destination at Lagrange point 1. But the upper stage didn't have enough fuel to return to Earth or escape the system entirely. So it just.

stayed. Circling. Drifting. Slowly nudged by gravity from the Earth, the Moon, and the Sun.

By early 2022, astronomers calculated the inevitable: impact on the lunar far side. March 4.12:25 UTC. Near Hertzsprung crater. It wasn't the first human-made object to hit the Moon.

Not even close. But it was the first unintentional* one we saw coming. Why It Mattered Look, space junk in low Earth orbit gets all the attention. Thousands of tracked objects.

Collision risks. Debris fields. But cislunar space? That was supposed to be empty.

Clean. The Falcon 9 stage changed that conversation overnight. Suddenly people asked: how many other dead rockets are out there? How many missions left hardware in unstable orbits?

The answer, it turns out, is more than zero. Several upper stages from the 1960s and 70s are still unaccounted for. Some may have hit the Moon decades ago. Others could still be out there, waiting for gravity to finish the job.

The 2022 impact forced space agencies to start tracking cislunar debris seriously. Not just "would be nice" — necessary*. With Artemis ramping up, Gateway station planning, commercial landers lining up. you don't want a surprise four-ton projectile crossing your landing trajectory.

How the Impact Played Out The stage came in at roughly 2.6 kilometers per second. Shallow angle. Far side, so no direct Earth observation. But we had eyes nearby.

LRO Was Watching NASA's Lunar Reconnaissance Orbiter wasn't in position for the moment of impact. Orbital mechanics don't cooperate on command. But the LRO team adjusted the orbit weeks later to photograph the crash site. They found it: a fresh double crater.

Roughly 18 meters across for the eastern lobe, 16 for the western. Two distinct pits, not one. That double crater told us something important. The stage wasn't a uniform cylinder of mass.

Most of the weight — engines, tanks, plumbing — sat at the bottom. The top was mostly empty fuel tank. When it hit at a shallow angle, the heavy end dug in first, then the lighter top section followed milliseconds later. Two impacts.

One object. Seismic Data From the Past Here's where it gets interesting. The Apollo seismic network shut down in 1977. But the data?

Still usable. Researchers went back and modeled what a Falcon 9 impact would* have looked like on those old seismometers. The signal would've been clear. Distinct from meteoroid impacts. Took long enough.

Longer duration. Lower frequency. We basically calibrated a 50-year-old instrument with a 2022 event we couldn't directly measure. That kind of cross-era science doesn't happen often.

It reminded people that Apollo's legacy isn't just flags and footprints — it's infrastructure that keeps paying dividends. What Most People Got Wrong "SpaceX Should Have Prevented This" Easy to say in hindsight. The 2015 launch predated modern disposal guidelines for high-energy orbits. The stage couldn't* do a controlled reentry — not enough delta-v after pushing DSCOVR to its transfer orbit.

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Could they have aimed for heliocentric disposal? Maybe. But that requires precise targeting and extra fuel margins that didn't exist on that mission profile. The real failure wasn't SpaceX's.

It was systemic. No international regulation required disposal planning for that orbit type in 2015. The stage followed the rules that existed. The rules just had a gap.

"It Created a Massive Crater" People imagined a spectacular scar. Reality: 18 meters. The Moon gets hit by natural objects that size every year*. The difference?

We knew exactly* what hit, exactly* when, exactly* how fast, and exactly* what it was made of. That's the scientific gold. Not the hole. The known variables.

"This Never Happens" It happens. We just didn't track it. The Apollo 10 ascent stage ("Snoopy") is still out there somewhere. Several Soviet Luna stages.

Ranger impactors. Surveyor centaurs. The difference with the Falcon 9 stage? We saw it coming.

That's new. What Actually Works: Tracking and Mitigation Cislunar Space Situational Awareness Post-2022, the U. S. Space Force stood up a dedicated cislunar tracking cell.

Not just radar — optical telescopes, too. The geometry out there is nasty. Objects alternate between Earth-dominated and Moon-dominated orbits. They can disappear for months behind the Moon, then reappear on a different trajectory.

Traditional LEO tracking doesn't work. Commercial players joined in. Companies like ExoAnalytic and Numerica now offer cislunar catalog services. Universities contribute telescope time.

It's a patchwork, but it's a patchwork. Better than nothing. Disposal by Design New missions now require end-of-life plans for high-energy upper stages.

• Earth reentry — if margins allow
• Heliocentric injection — solar orbit, effectively gone forever
• Lunar impact — planned*, targeted, documented
• Graveyard orbit — stable, high, out of the way The key word: planned*. No more "oops, it hit the Moon." International Standards The UN Committee on the Peaceful Uses of Outer Space (COPUOS) adopted voluntary guidelines in 2024 for cislunar debris mitigation. Not binding. But they exist. China, India, Japan, ESA — all participated. Artemis Accords signatories went further, committing to shared tracking data and disposal transparency. Will everyone follow them? Probably not. But the norm is established. That matters. The Crater Today LRO imaged the site again in 2024. The ejecta blanket has faded — space weathering works fast. Micrometeorite gardening. Solar wind sputtering. The bright rays are gone. In another decade, the crater will look like any other small, fresh-ish crater. Anonymous. But we know*.