In what year was AB Andromedae discovered: 1902, 1927, 1928 or 1961?

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AB Andromedae (AB And) is a binary star in the constellation Andromeda, discovered to be an eclipsing binary by Paul Guthnick and Richard Prager in 1927.

Dig deeper: codexery.com/variable-stars-part-2/e/part-1/ab-andromedae/

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