Not to detract from the planet found by Maddox, which actually has better numbers, you will still die a slow death by progressive Hyperoxia on the one I just posted above. If I can stay longer than 1 hour without experiencing a horrible, painful death, I'm thrilled. I'd still rather hang out on RS 0-7-1161177-888-21-8-3121149-2720 4 even if the radiation exposure is the same, his is a bit warmer.
And that is the Mountain Nebula. It's HUGE with plenty of nice places to view everything. It includes The Homunculus Nebula, which is surrounding Eta Carinae and is especially cool, with binary suns and two sets of binary planets!