Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_177766_1 (right_ascension__hm_ VARCHAR, abbre­viation VARCHAR)
### Question:
This constellation, abbreviated as 'oph' has how many right ascension (in hm)?
### Answer:
SELECT COUNT(right_ascension__hm_) FROM table_177766_1 WHERE abbre­viation = "Oph"