Did it blink like morse code "... ... ... ..." ? Or like ".................."
I have been studying some of the satellites. I'll get my starry night going around 9pm last night and see what was up.
Ok, around 9PM AEDT last night. er about 20:37 to be exact a satellite arose from the NW and set in the SE around 20:46. Called the PSSC.
I think you might be looking at the PSSC :
http://www.nasa.gov/mission_pages/st...ents/PSSC.html
Most probably would match your discription, due to the solar cells flashing in sun as it turned.