Most likely no - while you can 'push zone' a little, you take chances. If it is a small plant, maybe you should lift it in late fall, put in a pot and overwinter indoors - just to be on safe side. If larger plant, you could keep part of it outdoors and another part in a pot indoors and see what happens. It depends very much on site - if protected by a wall or something similar, it could be creating a mini-climate that would be just little 'warmer'.

If I bring it in for winter and keep it properly watered and in sun, how long could this planet live?

Growing mine in San Diego.

What I've learned about this plant is:

1) likes part sun/part shade

2) does not like extreme heat and...

3) Prefers being moist instead of dry.

I would bring it inside for the winter. If it should ever approach Zero or below, it would not survive.

I would think it will live for a long time as long as you treat it right - like other succulents. I have Angelina which is hardier, and it grows and propagates easily - just stick a piece of it in the planting spot and it grows. You could do that with yours when you bring it outside again.

I'm in zone 5 (recently updated from zone 4) and I had a patch of lemon coral sedum that survived last winter. Granted, it was a warmer than average winter with little to no snowfall, and it was buried under dry leaves.

In the past, I have overwintered lemon coral sedum indoors in the pretty sunny loca of my south facing porch where stays pretty much between 40° and 70°. It survives but gets leggy and fragile by the end of winter .I have also left some in a pot on my garage (minimum temp around 35°, pretty dark), and a basement closet (59-65°, very dark), and both came back beautifully in the spring. One LCS plant that I had in my bedroom in a west facing window survived as well, but looked sad by the end of winter.

Overall, my LCS survived -- but not necessarily thrived -- over winter.