High altitude oval traveling from SW to the NE, stopped then ascended upward until it vanishedAt approximately 10:45 am I was taking some photos of my Sister-in Laws house. An object caught my eye in the SW sky at a very high altitude. It was hard to make out the shape of the object however it appeared to be oval & silver/white w/ blue skies as a background. This object was traveling very slow & left no contrail. I compared this object to surrounding air traffic which all were leaving contrails at 35k feet. I watched as the object moved in a NE direction but not in a linear direction. I watched as it appeared to stop & ascend upward until it vanished out of sight. This entire event lasted about ten minutes. I don’t know of any aircraft that moves like this. I was able to capture some photos & upon zooming in on them w/ my computer, it certainly was not an airplane. My guess is that this object was at a very high altitude because even using 9x zoom, it was hard to make the shape out. One thing I did notice on the zoomed photos was defined shading on the bottom of the object.I work in the aerospace industry & I’ve seen many unexplained objects in the sky, mainly the reddish orange orbs typically seen in Gilbert, AZ.((NUFORC Note: We suspect the witness means a date of February 09, 2003. We have amended the date here, and we will confirm it with the witness. PD))