St Hildegards Prophecy and Comet Ison

St. Hildegard’s Prophecy "A powerful wind will rise in the North carrying heavy fog and the densest dust (darkness?) by divine command and it will fill their throats and eyes so they will cease their savagery and be stricken with a great fear...
Before the Comet comes, many nations, the good excepted, will be scoured with want and famine. The great nation [the United States] in the ocean that is inhabited by people of different tribes and descent by an earthquake, storm and tidal waves will be devastated.
It will be divided, and in great part be submerged... The Comet by its tremendous pressure, will force much out of the ocean and flood many countries, causing much want and many plagues.
All sea coast cities will be fearful and many of them will be destroyed by tidal waves, and most living creatures will be killed and even those who escape will die from a horrible disease."

This is a thousand year old prophecy.
I think most would agree that 'the great nation' spoken here is the USA. But would most agree that the comet spoken here is comet Ison?