Word of the Week: Ephemeris - OSIRIS-REx Mission

Ephemeris Definition and Illustration

Word of the Week: Ephemeris

A data set that describes an object’s exact position in space, which includes its location and velocity at regular intervals [Plural: ephemerides]

The mission team uses ephemerides from OSIRIS-REx to navigate the spacecraft and plan observations of asteroid Bennu.

Credit: University of Arizona

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