HD 216489

E1988459 UNEXPLORED

HD 216489, also known as IM Pegasi, is a variable binary star system in the constellation Pegasus that served as a key guide star for NASA’s Gravity Probe B relativity experiment.

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All labels observed (1)

Label	Occurrences
HD 216489 canonical	1

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

IM Pegasi → catalogDesignation → HD 216489 ⓘ