They say if you want to see the rainbow, you'll have to bear with the rain. But this particular rainbow just appeared in the sky, once upon an Idul Adha (if I remember correctly), along with no rain.
It's a full circle around the sun. But it seems like diameter of the rainbow itself was too big for my little pocket camera to capture whole of it.
it is called halo.
that's also occurred in full moon :)