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NASA's Lunar Reconnaissance Orbiter Documents New 225-Meter Crater on Moon

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NASA's LRO Captures Largest New Crater Formed on the Moon Since 2009

NASA's Lunar Reconnaissance Orbiter Camera (LROC) has documented the formation of a new impact crater on the Moon. The crater, measuring approximately 225 meters in diameter and 43 meters deep, was identified through the comparison of images taken before and after its formation in late spring 2024.

This is the largest crater observed forming since the Lunar Reconnaissance Orbiter mission began in 2009.

Discovery and Documentation

The findings were presented at the 57th Lunar and Planetary Science Conference in March. The formation was confirmed by comparing high-resolution images taken before and after the impact event.

Crater Characteristics

The newly formed crater has several distinct physical features:

  • Dimensions: Approximately 225 meters in diameter and 43 meters deep.
  • Shape: Described as funnel-shaped with steep walls.
  • Ejecta: Large blocks of ejected rock surround the crater's rim. The largest of these blocks measures about 13 meters across.
  • Impact Direction: Analysis of the debris pattern suggests the object arrived from the south-southwest, ejecting material northward.
  • Interior Material: Dark, glassy material observed inside the crater is consistent with rock that was flash-melted by the heat of the impact and subsequently solidified.

Context and Frequency

  • The previous largest crater discovered forming during the mission was 70 meters across.
  • Impact frequency models estimate that an impact creating a crater of this scale on any given area of the lunar surface occurs approximately once every 139 years.
  • The Moon's surface preserves impact craters because it lacks an atmosphere and the weathering processes, such as wind and water erosion, that occur on Earth.

Scientific Significance

The event provides a unique dataset for planetary scientists.

Researchers state this is the first time meter-scale photographs have been obtained of a crater this size, both before and after its formation.

The availability of this before-and-after imagery allows scientists to test and refine models of how impact craters form. This data is applicable to understanding impact processes not only on the Moon but on other bodies throughout the Solar System.