No, it is not! You should have asked any Muslim about the direction or any non muslim about the direction of east or north. Even if you couldn’t find anyone to tell you, you should have made your best to face what you think is the qibla and prayed before the time was over.

Recently I was in a shopping mall in the UK and I had just realised I had just about half an hour until Asr adhan and hadn’t done my dhur salah yet. My mother and aunty had gone off somewhere and I was alone with my freind and we are young. I could not tell the direction to pray in as the sun was blocked. What should I have done? I prayed after, is it accepted?