Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
specific orbital energy of −29.8 mj/kg has what orbit?

### Inputs:
table_name: table, columns: ['orbit', 'center-to-center distance', "altitude above the Earth's surface", 'Orbital period', 'specific orbital energy']

### Response:
SELECT orbit FROM table WHERE specific orbital energy = −29.8 mj/kg