The more important question is, how can you tell?
Remember if you type your whole exact title into Google, it will always show as #1. That means nothing, because nobody is searching for that exact title.
Also, Google shows different results to different people depending on where they are, what their previous searches were, etc. So you may see your Hub on the first page, but that doesn't mean anyone else does.
There used to be a site called Scroogle where you could find out the real position of your Hub. These days you have to use a special program and many of them cost money.