Hi bartman, there are three options for this problem.
First, you could change the session timeout on the account (go to Settings -> Manage Accounts -> Select the account and click Edit -> Change 'Disable Session Timeout' to Yes).
Second, you could pass the login credentials directly in the URL. Here is an example of how this works:
Third, you could use windows account authentication. This way, as long as you are logged in with an account that has access, the Orion login will be bypassed and you will be sent directly to that URL.