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16 Cygni Ab, it is named like this since it orbits the main star, with two stars orbiting outside it's orbit. there are four objects in that system. 16 Cygni A, 16 Cygni B, 16 Cygni C, and 16Cygni Ab. to find out how the names work, there are plenty of lists out there on binary star/planet system naming.

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14y ago

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