text: 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_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?
  ### Answer:
  SELECT condition_parameter FROM table_15314901_1 WHERE velocity_angle_η_in_i_radians = "ln[(1 + √5)/2] ≅ 0.481"