A steady hand needed - Jupiter shot hand-held

Had a really nice clear sky earlier, (just before the fog and cloud rolled in). Noticed Jupiter was looking nice and bright in the sky so tried a hand-held shot using a Canon EOS 7D with a 100-300 lens attached. Put the lense on manual focus and set it to infinity, whacked the zoom up to 300mm, set the camera at f5.6 and 1/60th sec at ISO 6400. Got this result, (heavily cropped) ... Will try same shot another night on a tripod and compare the results!