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Psyche orbit operations At Psyche, the Psyche spacecraft will observe the asteroid from four different orbits, which are labeled A, B, C, and D. Due to changing amounts of sunlight as asteroid Psyche orbits the Sun, spacecraft Psyche will not visit each orbit from highest to lowest. Instead, it will use the order A, B1, D, C, and B2. (The B1 and B2 orbits both refer to orbit B.) NASA/JPL-Caltech