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_15314901_1 ( condition_parameter VARCHAR, velocity_angle_η_in_i_radians VARCHAR )

### Question ###
If the velocity angle is ln[(1 + 5)/2] 0.481, what is the condition/parameter?

### Accurate SQL ###

SELECT condition_parameter FROM table_15314901_1 WHERE velocity_angle_η_in_i_radians = "ln[(1 + √5)/2] ≅ 0.481"