Chart of comet P/2012 NJ in Pegasus as seen from Mayhill NM around the time of closest approach. The various rectangles show the field of view of T14, T11 and T20 (click to embiggen).
The asteroidal object 2012 NJ, which had a comet like orbit, is now designated as a comet - P/2012 NJ (La Sagra) (http://www.minorplanetcenter.net/mpec/K12/K12O08.html). Cbet 3178 reports that a 35" tail has been reported by observers using the 1.23-m telescope on Calar Alto on July 16, 17, and 18 UT (http://www.cbat.eps.harvard.edu/iau/cbet/003100/CBET003178.txt )
Perihelion was on June 12, and the comet's closest approach to Earth is on July 222 at 08:15 UT, when it will be only 0.58 AU away, but sadly it will be only magnitude 14.8 and getting dimmer. It transits around 4 am, but is high enough shortly after midnight for imaging.
Alos, don't forget the close approach of NEO 2002 AM2 on July 22.