Impressive black UFO photographed over Sydney

On September 22, 2015, an inhabitant of Sydney (in Australia) was watching the sky with his telescope when he has noticed a very impressive black UFO moving quickly in the sky. He has taken several photos. What is it? An ultrasecret military prototype or an alien unidentified flying object?

Witness report:

After locking my telescope observatory i walked down the side of my home to check my plants for watering @ which time i looked skyward to check for rain when i saw an object that resembled a large piece of aluminium fluttering in the distance.I watched this object for 30 to 40sec before running inside to grab my camera(Canon400d with 300mm zoom lense)& then running out the back door hopeing it would stay on the same heading,it did & i was able to find it pretty quickly again.I watched it move left,right,descend & ascend at will with no turning circle at all,just direct directional changes of up to 180deg at times with no speed loss before slowing at witch time i engaged the image stabilizer on the camera & took 4 shots,all within 10seconds,after the fourth images it changed direction by 180deg & ascended into the clouds,i wacthed that area of sky for the next 1.30hours with no joy, after witch time i went inside to check the images to find an object unlike anything i've ever seen or researched training to be a pilot in my younger years. Im an Astronomer & have not submitted these images till now because an astronomer may be seen as someone looking for ALIENS witch is not case,i'm a astrophotographer.