Introduction[]
Hello. This is going to be simple, just a paste of what @DontTalkDT already did for us in this thread:
Basically, we have this character, Hudra, who is stated through databook information to have created a pocket dimension where we see starry skies, plus some nebulas. Despite contradictions shown in the video, they can easily be chalked up to Plot-Induced Occurrences as they have little bearing to the actual feat showcased. That aside, this blog is for evaluations purpose only, so let's get to it.
Lumagion's Size[]
Here is the calculation DT made in regards to the size of the realm, using the nebulas shown as basis:
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For reference, for nebula being 1ly is normal and the closest nebula to earth is 650ly away.
Both of those numbers are too small.
It should still be by far large enough for above baselines 4-A, though.
If we assume a sun-like star in the nebula and use 650ly = 6.149e+18m distance we can easily do a calculation, though.
Using the E = 4*U*(Er/Tr)^2 from here we get:
E = 4*5.693*10^41*(6.149e+18/696340000)^2 = 1.7756913328792954943e62 J
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That's roughly 9.5x lower than the result from the base calculation it used (This), but still a good way into 4-A.