The Sun has a mass of about 2x10^30 kg. 4 orders of magnitude smaller would be 2x10^26 kg which is somewhere between the mass of Saturn and Neptune. So turn on

The Sun has a mass of about 2x10^30 kg. 4 orders of magnitude smaller would be 2x10^26 kg which is somewhere between the mass of Saturn and Neptune. So turn one of those into energy and you're good to go.