May has an abundance of wonderful subjects to image, in the South the Milky Way arches above the horizon and you are spoilt for choice, the globular cluster Omega Centauri (recently imaged by iTelescope user Gordon Mandell) but you might like to try the spectacular split galaxy Centuarus A. It is high in the southern sky around midnight, and makes for a very nice colour portrait.
In the northern sky the Virgo cluster of galaxies are still high in the sky near midnight. This group is attractive in several instruments from the wide scal T-14 to the T-05 imager.
Iconic Pluto is still close to M25. Pluto is currently magnitude 14, within reach of the T-05 and T-09 instruments.
Comet 2010 X1 Elenin is currently magnitude 13.7, a bit dimmer than the predicited 13.2 at this stage. It passes close to several small, magnitude 15 and 16 galaxies as it journeys through the constellation of Leo. Updated orbital elements for downloading into a planetarium program or directly into GRAS are at the Minor Planet Ephemeris Center.
Comet C/2009 F4 McNaught is currently magnitude 13.2, brighter than expected. It is only visible from the southern hemisphere near Ocatnis. On May 1st it is 8' from manitude 10 IC 4499, then on May 10 and 11 it is within 19' of the 14th magnitude galaxy PGC 49670.