And your battery will be drained by the time you want to start it. Worse the battery drain will be enough so you may not be able to open the hood to get at the battery...and that may have already happened in the 6 weeks it has been stored.
So what I'd do TODAY is open the hood and put a charger on the battery on low for as long as it takes to get the battery back up to full charge.
Then you have 2 choices:
1. Unhook the battery so it doesn't drain. Downside is you will have to reset every thing like the radio, etc when you reconnect it in the spring. Key out of ignition switch when you do the connect/reconnect.
2. Or get a battery tender. (doesn't have to be expensive, WalMart for less than $25)
Starting it as you propose is not thought to be good for the insides of the engine...more wear.
Mine is sitting with a tender on it as I'm away from it for 7 weeks.
A Boxster in Winter