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April 30, 2022

Image of millimeter-wavelength emissions from surface of asteroid

Image of millimeter-wavelength emissions from the surface of the asteroid Psyche as it rotates through space. The emission reveals the surface temperature of Psyche and how it changes with the asteroid's time of day and the location on the surface. The image is constructed from data from the Atacama Large (sub)Millimeter Array. This is the first time the surface temperature an asteroid has been mapped at such high resolution from Earth-based telescopes.

[ALMA is supported by U.S. National Science Foundation grant AST 1647375.]

Learn more in the Caltech news story Observatory in Chile takes highest-resolution measurements of asteroid surface temperatures ever obtained from Earth. Or learn more about ALMA. (Date image taken: Aug. 5, 2021; date originally posted to NSF Multimedia Gallery: April 30, 2022)

Credit: Katherine de Kleer, Caltech

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