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_2150068_1 (decay VARCHAR, mass_kg_ VARCHAR)

### Question ###
What was the decay for the sattelite that was 180 kg?

### Accurate SQL ###

SELECT decay FROM table_2150068_1 WHERE mass_kg_ = "180"