User blog comment:DMUA/StarCross: Feats for the whole family/@comment-25603146-20190411134619

I think you might've mis-inputed the mass for the "Equinox kills us all" feat. More specifically, 1.469534618e+22 kilograms isn't 80% of 7.34767309e+22 kilograms; it is closer to 20%...

7.34767309e+22 kilograms * 4/5 = 5.87816e+22 kg, and putting that into the calculator you linked gives me 5.2830e+39 Joules. Or, ~1.263 Ninatons of TNT. About one-sixth of baseline Low 4-C.