So i'm guessing that even with the smarts of the 2 people above this post .... you both clearly missed the fact that it's not 28x all round, so it's not a mission Dyson, period, as ActualFate stated.
Mission Dysons have always been 28x all round since inception.
Now, as to how the passives reached such heights. Here's a sneaky hint for all of you, people used to cheat(some still do)..... shhhhh... don't tell anyone, it's a big ol' secret.
That said, the only exception to someone having cheated the passives onto the planet would be;
If this Dyson was the test Dyson that Dan used to see if the addition of the 10k Passives would take. There are a fair few test planets floating out in the galaxy, so i wouldn't rule this out as being one of them.
Also, when can i get that nice arti planet Deigo?