Whoo! De-Fault! De-Fault!
By the way, the value of losing 280 population in one swing, with 100% allegience, with a full recovery afterwords, is worth about 8000 credits over roughly 37 minutes, with the worst penalty being around the initial loss.
The value of losing that homeworld is worth... uhm... a lot more than that.
A 100% allegience asteroid losing all 20 population and then growing back unmolested costs 200 credits over 15 minutes. The value of losing the asteroid STARTS at over 4 times that value.
This is without tax income upgrades, population upgrades, or population growth upgrades.
The reason your values are higher than what I stated, is because normal income game settings give a 15% boost to income across the board. Sorry, my numbers were off 15% because I forgot about this.
Being pedantic is fun.