4th 2012 Nova Sagittarius PNV J18202726-2744263 was discovered in Japan by Koichi Nishiyama and Fujio Kabashima as 7.8 magnitude object on July 7th. S&T sent out an AstroAlert and I was able to follow-up on it using iTelescope T20 in New Mexico. Here's a animation produced by overlaying a SERC survey image taken on 18-May-1987 . Bright star in the upper right corner is HR6842 +4.65m.
AAVSO light curve is here.