How is market cap calculated?
Price x Number of coins in circulation
Current Auroracoin market cap:
.05225 BTC/AUR x 103,851 AUR = 5426 BTC
So basically what your saying is that when the airdrop happens the market cap will be approximately:
.05225 BTC/AUR x 10,500,000 AUR = 548625 BTC
That's a lot of Bitcoin.