Question: This constellation, abbreviated as 'oph' has how many right ascension (in hm)?
Schema: create table table_177766_1 (right_ascension__hm_ varchar, abbre­viation varchar, PRIMARY KEY (right_ascension__hm_))
SQL: select count(right_ascension__hm_) from table_177766_1 where abbre­viation = "oph"