C/2012 S1 also known as Comet ISON or Comet Nevski–Novichonok can be seen right now below the constellation LEO (and below the planet Mars). It is a very hard to find binocular object and a hard to find object in a small refractor in fairly dark urban skies. A 6-inch or larger scope is best. Apps such as Sky Safari have the position of ISON right on the mark. It will help to have stars plotted (visible) to magnitude 8. Best time to look is 5:00-5:30AM. It is not a “wow” comet to-date but a good comet for folks who love the thrill of the hunt. Lots of good images of comet are at Spaceweather.com (http://spaceweathergallery.com/index.php?title=ison) such as this one by Mike Broussard on November 3, 2013 Maurice, Louisiana:
Astronomical observer for 20 years and optical engineer. I design non-imaging prism and reflector optics for commercial, medical and high-end retail lighting.