From Remus , the closer moon , Sylvia appears very big , about 30 Â Ã -- 18 Â across , while its view of Romulus varies between 1.59 and 0.50 Â across . From Remus , the inner moon , Sylvia appears huge , roughly 30 Â Ã -- 18 Â across , while its view of Romulus varies between 1.59 and 0.50 Â across .