I was taking some pics from my backyard, with camera Nikon DX40 on a steady tripod. My intention was to capture a day-by-day sequence of the conjunction of Jupiter and Mercury. I was supriesed when dowloaded the photos and spoted a greeny glowing object on four pics. I stacked the pics and noted it on 4 diferent positions, I looked up on stelarium software and could not identify any celestial objects on that position. So, what could it be? Thanks to MUFON!