So it would be not unreasonable to have an Earth-sized planet with two moons, one at 140K and one at 380K? Or one at 50K and one at 380K?
How about orbital periods for these worlds? Using this calculator
http://www.ajdesigner.com/phpgravity...ion_period.php
I get a period of about 1.3 days for the 50Kmoon, and about 6 days for the 140K moon. But that calculator assumes the moons are massless, I think.