NASA Orbiter Finds 728-Foot Moon Crater; Debris Disturbed Terrain 75 Miles Away

A 728-foot-wide crater appeared on the moon in 2024, but the impact’s measurable reach extended much farther: ejected material disturbed terrain more than 75 miles away. Data from NASA’s Lunar Reconnaissance Orbiter also revealed a broad nighttime temperature change, giving future lunar-mission planners direct observations of how one impact can alter ground conditions far beyond its rim.

Two studies published September 16 in Science Advances describe the newly named McGetchin crater and its surrounding surface changes. Before-and-after orbital images constrain its formation to between April 11 and May 22, 2024. The crater measures 728 feet across and 141 feet deep, and researchers estimate that an asteroid or comet comparable in size to a three- to six-story building produced it.

A wide disturbance around a much smaller crater

The crater’s dimensions are only the starting point. Researchers examining changes in surface reflectance found disturbances extending more than 75 miles from the impact site over 1,000 crater radii. That does not mean a continuous, thick debris blanket covers the entire distance. The distant signature includes subtle changes in the uppermost lunar surface, detected by comparing composites of images taken before and after the impact.

This distinction matters operationally. The observations show that an impact’s affected area cannot be defined solely by the visible crater or its immediate ejecta blanket. Fine material arriving farther away can churn or roughen the shallow surface enough to change how it reflects light. The exact mechanisms that produced the most distant patterns remain an area for modeling, but the measured footprint establishes that surface modification can extend across a far larger area than the crater itself.

The finding was possible because the Lunar Reconnaissance Orbiter has repeatedly mapped the moon since launching in 2009. Robert Wagner, an image-processing specialist at Intuitive Machines, noticed a bright area surrounded by a dark halo in October 2025. Comparing it with older imagery established that the feature was new, while later high-resolution observations provided measurements of its depth, shape and surrounding deposits.

Orbital temperatures reveal loosened lunar soil

A separate instrument aboard the orbiter added another layer to the analysis. Diviner, which measures lunar surface temperatures, identified a roughly four-mile-wide region around McGetchin crater that was approximately 16 degrees Fahrenheit cooler than nearby ground at night.

Researchers attribute that cold spot to regolith the moon’s fragmented surface material being loosened or “fluffed” by the impact. Lower-density regolith retains less heat and cools more rapidly during the lunar night. The thermal footprint is much smaller than the 75-mile-plus optical disturbance because the instruments respond to different physical changes: nighttime temperatures reflect modification at greater depth, while visible imaging can detect much finer alterations at the surface.

That difference is useful for mission planning. Orbital images can show where an impact changed surface texture, while thermal measurements offer evidence that the regolith’s bulk properties also changed closer to the crater. Neither measurement alone establishes how a specific rover or structure would perform there, but together they provide boundaries for assessing wheel interaction, mobility, construction and long-duration exposure to impact-generated debris.

Why before-and-after data are unusually valuable

Crater-production models estimate that an impact on this scale occurs on the moon approximately once every 132 years. That figure is a statistical average, not a fixed schedule. Its scientific value comes from timing: the orbiter had already photographed and thermally mapped the region before the event, allowing researchers to compare the same terrain under pre-impact and post-impact conditions.

The moon has no atmosphere capable of slowing or burning up most incoming space rocks. Future crews, rovers and infrastructure will therefore operate on a surface that continues to be modified by impacts, including events occurring many miles from an asset’s location. McGetchin does not by itself dictate a new base design or safety rule, but it supplies measured scale for risk models that previously depended more heavily on older craters and simulations.

The next useful step is continued orbital monitoring to determine how quickly the optical and thermal signatures fade. Researchers also identified surface measurements by a mobile asset as a way to connect orbital temperature and reflectance data with actual regolith density and mechanical behavior. Until such measurements are available, McGetchin’s strongest contribution is the documented mismatch in scale: a crater hundreds of feet wide produced detectable changes across more than 75 miles of lunar terrain.

By David Whitaker — Associate editor for AMI’s aerospace and drone systems desk, translating flight systems, aircraft programs, spaceflight, and UAV developments into accessible technical stories.