First,I'm Chinese,my English is poor.The story:i was waked up by the noisy of somebody's ring tone outside.it's about 1:40,i saw a lightspot in the sky, i thought it might be a star,quickly i found it was impossible,for it's too light to the bad air in ShangHai.Then i thought it's a plane or satellite,it can't be a plane because it didn't move,i don't know if it's a satellite,so i took it a pic.before i took the pic,i thought it mast be a star or satellite an so on,when i saw the pic,i was confused,i really don't know what's on this pic.i suspected that,although i use the selfshot mode to take the photo,it took 15s to exposure,maybe the wind or something else swayed the camera.when i want to take another photo,the cloud hid the lightspot.