If the canon gods say 200 gigatons, 200 gigatons it will be. Lucasfilm > you on the canon scale. Before you scream "SCREW CANON!" you should realize that a defined canon is the ONLY way to carry out versus debates. Most prominent universes have canon policies, ranging from strict ones like that of Star Trek (Gene Roddenberry said "It's not Star Trek until I say it's Star Trek!") to relaxed ones like the SW policy to the almost useless, like that of 40k ("The Black Library books are canon...sort of, and the Imperial Armour books are canon...sometimes" is the general attitude).