Find Site owners with Powershell

I need to find out who the site owners are for about 50 sharePoint sites. We need to contact site owners.

Is there a powershell script that will tell me who site owners are for all of my sites.

I have tried  get-spweb http://site/subsite | format-table -property URL, owner, quota

This only gives me the url though, The site field has no data, nor does the quota (don't need quota, this was just added as a test)

Thanks

LSTalbot