The Saga of an Astronomer’s Hat

I am reading this article The Saga of an Astronomer’s Hat By Robert H. McNaught here (http://www.skyandtelescope.com/astronomy-news/the-saga-of-an-astronomers-hat/#sthash.0Scx77VC.dpuf) He discovered the comet known as Siding Spring (C/2013 A1).