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_37866 ( "orbit" text, "center-to-center distance" text, "altitude above the Earth's surface" text, "Orbital period" text, "specific orbital energy" text )

### Question ###
specific orbital energy of 0.5 mj/kg is what altitude above the earth's surface?

### Accurate SQL ###

SELECT "altitude above the Earth's surface" FROM table_37866 WHERE "specific orbital energy" = '−0.5 mj/kg'