You lost it through your own fault, which means you can't get it back unless the recipient is very wholesome, in which case he or she will return it, but mostly not, so it was lost and gone forever in your wallet. That is why you should double check it before sending it, but my question is: why are you mistakenly sending it to the wrong address? Do you type or write the address and don't copy and paste it? or you just sent it while you were drunk? since it is difficult to send it to an address that you don't own.