Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_77 (declination___j2000__ VARCHAR, constellation VARCHAR, right_ascension___j2000__ VARCHAR)

### Question ###
what is the declination (j2000) that has a constellation of hydra and a right ascension (j2000) of 10h46m44.9s?

### Accurate SQL ###

SELECT declination___j2000__ FROM table_name_77 WHERE constellation = "hydra" AND right_ascension___j2000__ = "10h46m44.9s"