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physical object > natural object > celestial body > collection of stars > star system > binary star > close binary > nova > recurrent nova > RS Ophiuchi
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RS Ophiuchi comparison table
Subject is an instance of is a kind of
recurrent nova nova
RS Ophiuchirecurrent nova 

Next recurrent novaT Pyxidis    Uprecurrent nova    Previous recurrent novaWZ Sagittae