New insights about surface, structure of asteroid Bennu: OSIRIS-REx data indicates surface, near-subsurface rubble is loosely bound
When NASA’s OSIRIS-REx spacecraft collected samples from asteroid Bennu’s surface in 2020, forces measured during the interaction provided scientists with a direct test of the poorly understood near-subsurface physical properties of rubble-pile asteroids. Now, a Southwest Research Institute-led study has characterized the layer just below the asteroid’s surface as composed of weakly bound rock fragments […]
Arecibo observatory scientists help unravel surprise asteroid mystery
When asteroid 2019 OK suddenly appeared barreling toward Earth on July 25, 2019, Luisa Fernanda Zambrano-Marin and the team at the Arecibo Observatory in Puerto Rico jumped into action. After getting an alert, the radar scientists zoned in on the asteroid, which was coming from Earth’s blind spot — solar opposition. Zambrano-Marin and the team […]
Psyche, the iron giant of asteroids, may be less iron than researchers thought
The asteroid 16 Psyche, which NASA intends to visit with a spacecraft in 2026, may be less heavy metal and more hard rock than scientists have surmised, according to a new study by researchers from Brown and Purdue universities. Psyche, which orbits the sun in the asteroid belt between Mars and Jupiter, is the largest […]
Highest-resolution measurements of asteroid surface temperatures ever obtained from Earth
A close examination of the millimeter-wavelength emissions from the asteroid Psyche, which NASA intends to visit in 2026, has produced the first temperature map of the object, providing new insight into its surface properties. The findings, described in a paper published in Planetary Science Journal (PSJ) on August 5, are a step toward resolving the […]