Planet is anywhere from 45 to 78 lunar distances from the red dwarf, distances presumably being measured from center to center, rather than surface to surface. I do get stable solutions though, if the moon is very small-about the size of Dione-or rather, about the MASS of Dione, and orbiting at a distance of about 26000 to 45000 AU.
Tv/whatdamathFacebook: This is an updated tutorial for how to terraform planets in Universe Sandbox 2This. Can't seem to get any respectably sized moon to orbit, though-Hill-sphere too small-the red dwarf primary yanks the moon away from Kesh, and the moon ends up in its own orbit. You can buy Universe Sandbox 2 game here: amzn.
Atmospheric pressure is a little higher at 1.06. Magnetic field on, and mass is somewhere about 70 to 90% of earth's. Generally, I am able to get a "probability of life" of somewhere between 0.4 and 0.6, and that's not half bad, considering that we're talking about a remarkably arid world orbiting an M0.5 red dwarf primary that shares its orbit with an F8-type star that is in the process of evolving into a red giant! I am also using a modified "Mars" to model the desert world of Kesh from "Kesh: The Sands of Destiny". All very good points worth further research.